# V. S. Morozov - Michigan

## Contact Details

NameV. S. Morozov |
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AffiliationMichigan |
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CountryUnited States |
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## Pubs By Year |
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## Pub CategoriesPhysics - Accelerator Physics (14) Physics - Statistical Mechanics (9) High Energy Physics - Experiment (8) Quantum Physics (7) Physics - Soft Condensed Matter (6) Nuclear Experiment (6) Quantitative Biology - Biomolecules (5) Physics - Plasma Physics (5) Nuclear Theory (3) High Energy Physics - Phenomenology (3) Physics - General Physics (2) Physics - Biological Physics (2) Instrumentation and Methods for Astrophysics (2) High Energy Physics - Theory (2) Physics - Disordered Systems and Neural Networks (2) Cosmology and Nongalactic Astrophysics (2) Physics - Fluid Dynamics (1) Physics - Data Analysis; Statistics and Probability (1) Quantitative Biology - Genomics (1) Physics - Atomic Physics (1) Physics - Chemical Physics (1) Computer Science - Computer Vision and Pattern Recognition (1) Physics - Strongly Correlated Electrons (1) General Relativity and Quantum Cosmology (1) Mathematics - Mathematical Physics (1) Mathematical Physics (1) Physics - Mesoscopic Systems and Quantum Hall Effect (1) Computer Science - Distributed; Parallel; and Cluster Computing (1) Physics - Computational Physics (1) Computer Science - Performance (1) Physics - Materials Science (1) |

## Publications Authored By V. S. Morozov

Current searches for a dark photon in the mass range below 1 GeV require an electron-positron collider with a luminosity at the level of at least $10^{34}$ cm$^{-2}$s$^{-1}$. The challenge is that, at such low energies, the collider luminosity rapidly drops off due to increase in the beam sizes, strong mutual focusing of the colliding beams, and enhancement of collective effects. Using recent advances in accelerator technology such as the nano-beam scheme of SuperKEK-B, high-current Energy Recovery Linacs (ERL), and magnetized beams, we propose a new configuration of an electron-positron collider based on a positron storage ring and an electron ERL. Read More

The ion collider ring of Jefferson Lab Electron-Ion Collider (JLEIC) accommodates a wide range of ion energies, from 20 to 100 GeV for protons or from 8 to 40 GeV per nucleon for lead ions. In this medium energy range, ions are not fully relativistic, which means values of their relativistic beta are slightly below 1, leading to an energy dependence of revolution time of the collider ring. On the other hand, electrons with energy 3 GeV and above are already ultra-relativistic such that their speeds are effectively equal to the speed of light. Read More

Application of electron cooling at ion energies above a few GeV has been limited due to reduction of electron cooling efficiency with energy and difficulty in producing and accelerating a high-current high-quality electron beam. A high-current storage-ring electron cooler offers a solution to both of these problems by maintaining high cooling beam quality through naturally-occurring synchrotron radiation damping of the electron beam. However, the range of ion energies where storage-ring electron cooling can be used has been limited by low electron beam damping rates at low ion energies and high equilibrium electron energy spread at high ion energies. Read More

The choice of a figure 8 shape for the booster and collider rings of MEIC opens wide possibilities for preservation of the ion polarization during beam acceleration as well as for control of the polarization at the collider's interaction points. As in the case of accelerators with Siberian snakes, the spin tune is energy independent but is equal to zero instead of one half. The figure-8 topology eliminates the effect of arcs on the spin motion. Read More

**Authors:**S. Abeyratne, D. Barber, A. Bogacz, P. Brindza, Y. Cai, A. Camsonne, A. Castilla, P. Chevtsov, E. Daly, Y. S. Derbenev, D. Douglas, V. Dudnikov, R. Ent, B. Erdelyi, Y. Filatov, D. Gaskell, J. Grames, J. Guo, L. Harwood, A. Hutton, C. Hyde, K. Jordan, A. Kimber, G. A. Krafft, A. Kondratenko, M. Kondratenko, R. Li, F. Lin, T. Mann, P. McIntyre, T. Michalski, V. S. Morozov, P. Nadel-Turonski, Y. M. Nosochkov, P. N. Ostroumov, K. Park, F. Pilat, M. Poelker, N. J. Pogue, R. Rimmer, Y. Roblin, T. Satogata, A. Sattarov, M. Spata, R. Suleiman, M. Sullivan, A. Sy, C. Tennant, H. Wang, M-H Wang, S. Wang, U. Wienands, H. Zhang, Y. Zhang, Z. Zhao

**Category:**Physics - Accelerator Physics

This document summarizes the design of Jefferson Lab's electron-ion collider, MEIC, as of January 20, 2015, and describes the facility whose cost was estimated for the United States Department of Energy Nuclear Sciences Advisory Committee EIC cost review of January 26-28, 2015. In particular, each of the main technical systems within the collider is presented to the level of the best current information. Read More

The influence of the initial preparation on dephasing in open quantum dynamics is studied using an exactly solvable model of a two-level system (qubit) interacting with a bosonic bath. It is found that for some classes of non-selective preparation measurements, qubit-bath correlations lead to a significant enhancement of coherence in the qubit at the initial stage of evolution. The time behavior of the qubit purity and entropy in the regime of enhancement of coherence is considered for different temperatures and coupling strengths. Read More

Current and future surveys of large-scale cosmic structure are associated with a massive and complex datastream to study, characterize, and ultimately understand the physics behind the two major components of the 'Dark Universe', dark energy and dark matter. In addition, the surveys also probe primordial perturbations and carry out fundamental measurements, such as determining the sum of neutrino masses. Large-scale simulations of structure formation in the Universe play a critical role in the interpretation of the data and extraction of the physics of interest. Read More

**Authors:**A. Mishchenko, J. S. Tu, Y. Cao, R. V. Gorbachev, J. R. Wallbank, M. T. Greenaway, V. E. Morozov, S. V. Morozov, M. J. Zhu, S. L. Wong, F. Withers, C. R. Woods, Y. -J. Kim, K. Watanabe, T. Taniguchi, E. E. Vdovin, O. Makarovsky, T. M. Fromhold, V. I. Falko, A. K. Geim, L. Eaves, K. S. Novoselov

Recent developments in the technology of van der Waals heterostructures made from two-dimensional atomic crystals have already led to the observation of new physical phenomena, such as the metal-insulator transition and Coulomb drag, and to the realisation of functional devices, such as tunnel diodes, tunnel transistors and photovoltaic sensors. An unprecedented degree of control of the electronic properties is available not only by means of the selection of materials in the stack but also through the additional fine-tuning achievable by adjusting the built-in strain and relative orientation of the component layers. Here we demonstrate how careful alignment of the crystallographic orientation of two graphene electrodes, separated by a layer of hexagonal boron nitride (hBN) in a transistor device, can achieve resonant tunnelling with conservation of electron energy, momentum and, potentially, chirality. Read More

Here we are talking about the equivalence of Einsteinian gravitational equations solutions to relativist accelerated frames. It was established that there is a uniformly accelerated frame. Such a frame is deformed as an acceleration result, but it is a stiff frame according to Born, i. Read More

Muon colliders have been proposed for the next generation of particle accelerators that study high-energy physics at the energy and intensity frontiers. In this paper we study a possible implementation of muon ionization cooling, Parametric-resonance Ionization Cooling (PIC), in the twin helix channel. The resonant cooling method of PIC offers the potential to reduce emittance beyond that achievable with ionization cooling with ordinary magnetic focusing. Read More

We analyze the problem of the helix-coil transition in explicit solvents analytically by using spin-based models incorporating two different mechanisms of solvent action: explicit solvent action through the formation of solvent-polymer hydrogen bonds that can compete with the intrinsic intra-polymer hydrogen bonded configurations (competing interactions) and implicit solvent action, where the solvent-polymer interactions tune biopolymer configurations by changing the activity of the solvent (non-competing interactions). The overall spin Hamiltonian is comprised of three terms: the background \emph{in vacuo} Hamiltonian of the "Generalized Model of Polypeptide Chain" type and two additive terms that account for the two above mechanisms of solvent action. We show that on this level the solvent degrees of freedom can be {\sl explicitly} and {\sl exactly} traced over, the ensuing effective partition function combining all the solvent effects in a unified framework. Read More

We study the bath dynamics in the dephasing model of a two-state quantum system (qubit) coupled to an environment of harmonic oscillators. This model was shown [Morozov et al., Phys. Read More

Solenoid Siberian snakes have successfully maintained polarization in particle rings below 1 GeV, but never in multi-GeV rings because the Lorentz contraction of a solenoid's integral B dl would require impractically long high-field solenoids. High energy rings, such as Brookhaven's 255 GeV Relativistic Heavy Ion Collider (RHIC), use only odd multiples of pairs of transverse B-field Siberian snakes directly opposite each other. When it became impractical to use a pair of Siberian Snakes in Fermilab's 120 GeV Main Injector, we searched for a new type of single Siberian snake, which should overcome all depolarizing resonances in the 8. Read More

Problem solutions in area of diffraction and of scattering theory are considered from one point of view. The method common for them is based on approximate orthogonality of solution constituents, which oscillate on a body long frontier. Method potentiality is discussed. Read More

A. Einstein's question is answered, 'How does a body form change under acceleration?' Equivalency is proved between solutions of Nordstrom's equation and equation of uniformly accelerating reference frame. Read More

We present analytical results for the time-dependent information entropy in exactly solvable two-state (qubit) models. The first model describes dephasing (decoherence) in a qubit coupled to a bath of harmonic oscillators. The entropy production for this model in the regimes of "complete" and "incomplete" decoherence is discussed. Read More

**Authors:**A. Accardi, J. L. Albacete, M. Anselmino, N. Armesto, E. C. Aschenauer, A. Bacchetta, D. Boer, W. K. Brooks, T. Burton, N. -B. Chang, W. -T. Deng, A. Deshpande, M. Diehl, A. Dumitru, R. Dupré, R. Ent, S. Fazio, H. Gao, V. Guzey, H. Hakobyan, Y. Hao, D. Hasch, R. Holt, T. Horn, M. Huang, A. Hutton, C. Hyde, J. Jalilian-Marian, S. Klein, B. Kopeliovich, Y. Kovchegov, K. Kumar, K. Kumerički, M. A. C. Lamont, T. Lappi, J. -H. Lee, Y. Lee, E. M. Levin, F. -L. Lin, V. Litvinenko, T. W. Ludlam, C. Marquet, Z. -E. Meziani, R. McKeown, A. Metz, R. Milner, V. S. Morozov, A. H. Mueller, B. Müller, D. Müller, P. Nadel-Turonski, H. Paukkunen, A. Prokudin, V. Ptitsyn, X. Qian, J. -W. Qiu, M. Ramsey-Musolf, T. Roser, F. Sabatié, R. Sassot, G. Schnell, P. Schweitzer, E. Sichtermann, M. Stratmann, M. Strikman, M. Sullivan, S. Taneja, T. Toll, D. Trbojevic, T. Ullrich, R. Venugopalan, S. Vigdor, W. Vogelsang, C. Weiss, B. -W. Xiao, F. Yuan, Y. -H. Zhang, L. Zheng

This White Paper presents the science case of an Electron-Ion Collider (EIC), focused on the structure and interactions of gluon-dominated matter, with the intent to articulate it to the broader nuclear science community. It was commissioned by the managements of Brookhaven National Laboratory (BNL) and Thomas Jefferson National Accelerator Facility (JLab) with the objective of presenting a summary of scientific opportunities and goals of the EIC as a follow-up to the 2007 NSAC Long Range plan. This document is a culmination of a community-wide effort in nuclear science following a series of workshops on EIC physics and, in particular, the focused ten-week program on "Gluons and quark sea at high energies" at the Institute for Nuclear Theory in Fall 2010. Read More

Remarkable observational advances have established a compelling cross-validated model of the Universe. Yet, two key pillars of this model -- dark matter and dark energy -- remain mysterious. Sky surveys that map billions of galaxies to explore the `Dark Universe', demand a corresponding extreme-scale simulation capability; the HACC (Hybrid/Hardware Accelerated Cosmology Code) framework has been designed to deliver this level of performance now, and into the future. Read More

Helix-coil transition in polypeptides is an example of a spin model with a preferred spin direction, in the sense that a theoretical formulation of this problem requires to assign a preferred value of spin to the helical conformation in order to account for different symmetries of the helical {\sl vs.} the coil states. This leads to the spin Hamiltonian of the {\sl Generalized Model of Polypeptide Chain} (GMPC) variety as opposed to the Potts model variety, both with many-body interactions. Read More

**Authors:**S. Abeyratne, A. Accardi, S. Ahmed, D. Barber, J. Bisognano, A. Bogacz, A. Castilla, P. Chevtsov, S. Corneliussen, W. Deconinck, P. Degtiarenko, J. Delayen, Ya. Derbenev, S. DeSilva, D. Douglas, V. Dudnikov, R. Ent, B. Erdelyi, P. Evtushenko, Yu. Filatov, D. Gaskell, R. Geng, V. Guzey, T. Horn, A. Hutton, C. Hyde, R. Johnson, Y. Kim, F. Klein, A. Kondratenko, M. Kondratenko, G. Krafft, R. Li, F. Lin, S. Manikonda, F. Marhauser, R. McKeown, V. Morozov, P. Nadel-Turonski, E. Nissen, P. Ostroumov, M. Pivi, F. Pilat, M. Poelker, A. Prokudin, R. Rimmer, T. Satogata, H. Sayed, M. Spata, M. Sullivan, C. Tennant, B. Terzić, M. Tiefenback, H. Wang, S. Wang, C. Weiss, B. Yunn, Y. Zhang

This report presents a brief summary of the science opportunities and program of a polarized medium energy electron-ion collider at Jefferson Lab and a comprehensive description of the conceptual design of such a collider based on the CEBAF electron accelerator facility. Read More

We present a new symmetry-based concept for an achromatic low-beta collider interaction region design. A specially-designed symmetric Chromaticity Compensation Block (CCB) induces an angle spread in the passing beam such that it cancels the chromatic kick of the final focusing quadrupoles. Two such CCBs placed symmetrically around an interaction point allow simultaneous compensation of the 1st-order chromaticities and chromatic beam smear at the IP without inducing significant 2nd-order aberrations to the particle trajectory. Read More

The chain-polymer Cu(II) breathing crystals C21H19CuF12N4O6 were studied using the x-ray diffraction and ab initio band structure calculations. We show that the crystal structure modification at T=146 K, associated with the spin crossover transition, induces the changes of the orbital order in half of the Cu sites. This in turn results in the switch of the magnetic interaction sign in accordance with the Goodenough-Kanamori-Andersen theory of the coupling between the orbital and spin degrees of freedom. Read More

Cooling of muon beams for the next-generation lepton collider is necessary to achieve its higher luminosity with fewer muons. In this paper we present an idea to combine ionization cooling with parametric resonances that is expected to lead to muon beams with much smaller transverse sizes. We describe a linear magnetic transport channel where a half integer resonance is induced such that the normal elliptical motion of particles in x-x' phase space becomes hyperbolic, with particles moving to smaller x and larger x' at the channel focal points. Read More

Most helix-coil transition theories can be characterized by a set of three parameters: energetic, describing the (free) energy cost of forming a helical state in one repeating unit; entropic, accounting for the decrease of entropy due to the helical state formation; and geometric, indicating how many repeating units are affected by the formation of one helical state. Depending on their effect on the helix-coil transition, solvents or co-solutes can be classified with respect to their action on these parameters. Solvent interactions that alter the entropic cost of helix formation by their osmotic action can affect both the stability (transition temperature) and the cooperativity (transition interval) of the helix-coil transition. Read More

Spin resonances can depolarize or spin-flip a polarized beam. We studied 1st and higher order spin resonances with stored 2.1 GeV/c vertically polarized protons. Read More

**Authors:**R. J. Abrams, S. K. Agarwalla, A. Alekou, C. Andreopoulos, C. M. Ankenbrandt, S. Antusch, M. Apollonio, M. Aslaninejad, J. Back, P. Ballett, G. Barker, K. B. Beard, E. Benedetto, J. R. J. Bennett, J. S. Berg, S. Bhattacharya, V. Blackmore, M. Blennow, A. Blondel, A. Bogacz, M. Bonesini, C. Bontoiu, C. Booth, C. Bromberg, S. Brooks, A. Bross, O. Caretta, A. Cervera-Villanueva, S. Choubey, D. Cline, J. Cobb, P. Coloma, L. Coney, M. A. C. Cummings, T. Davenne, A. de Gouvea, C. Densham, X. Ding, A. Donini, P. Dornan, M. Dracos, F. Dufour, R. Eccleston, R. Edgecock, I. Efthymiopoulos, M. Ellis, E. Fernandez-Martinez, R. Fernow, G. Flanagan, J. C. Gallardo, R. Gandhi, R. Garoby, B. Gavela, S. Geer, S. Gilardoni, J. J. Gomez-Cadenas, S. Goswami, V. B. Graves, R. Gupta, G. Hanson, P. Harrison, T. Hart, P. Hernandez, P. Huber, D. Indumathi, R. P. Johnson, C. Johnstone, Y. Karadzhov, D. Kelliher, H. Kirk, J. Kopp, Y. Kudenko, Y. Kuno, A. Kurup, P. Kyberd, A. Laing, T. Li, M. Lindner, K. Long, J. Lopez Pavon, P. Loveridge, S. Machida, D. Majumdar, M. Maltoni, J. Martin-Albo, M. Martini, R. Matev, K. T. McDonald, A. McFarland, D. Meloni, M. Mezzetto, P. Migliozzi, S. R. Mishra, N. Mokhov, N. Mondal, J. Morfin, Y. Mori, V. Morozov, D. Neuffer, T. Ota, V. Palladino, S. Parke, S. Pascoli, J. Pasternak, J. Peltoniemi, R. Petti, T. Planche, M. Popovic, J. Pozimski, G. Prior, C. Prior, G. Rees, S. Rigolin, T. J. Roberts, Y. Roblin, C. Rogers, R. Samulyak, T. Schwetz, N. Simos, N. Sinha, G. Skoro, P. Snopok, F. J. P. Soler, N. Souchlas, J. Strait, D. Stratakis, S. Striganov, J. Tang, J. W. G. Thomason, L. Tortora, R. Tsenov, W. Winter, H. Witte, O. Yasuda, C. Y. Yoshikawa, M. Zisman

The International Design Study for the Neutrino Factory (the IDS-NF) was established by the community at the ninth "International Workshop on Neutrino Factories, super-beams, and beta- beams" which was held in Okayama in August 2007. The IDS-NF mandate is to deliver the Reference Design Report (RDR) for the facility on the timescale of 2012/13. In addition, the mandate for the study [3] requires an Interim Design Report to be delivered midway through the project as a step on the way to the RDR. Read More

Interfacing atomistic-based with continuum-based simulation codes is now required in many multiscale physical and biological systems. We present the first results from coupled atomistic-continuum simulations on 190,000 processors. Platelet aggregation in the patient-specific model of an aneurysm has been modeled using a high-order spectral/hp element Navier-Stokes solver with a stochastic (coarse-grained) Molecular Dynamics solver based on Dissipative Particle Dynamics (DPD). Read More

**Authors:**E. D. Courant, A. D. Krisch, M. A. Leonova, A. M. T. Lin, J. Liu, W. Lorenzon, D. A. Nees, R. S. Raymond, D. W. Sivers, V. K. Wong, I. Kourbanis, Ya. S. Derbenev, V. S. Morozov, D. G. Crabb, P. E. Reimer, J. R. O'Fallon, G. Fidecaro, M. Fidecaro, F. Hinterberger, S. M. Troshin, M. N. Ukhanov, A. M. Kondratenko, W. T. H. van Oers

The SPIN@FERMI collaboration has updated its 1991-95 Reports on the acceleration of polarized protons in Fermilab's Main Injector, which was commissioned by Fermilab. This Updated Report summarizes some updated Physics Goals for a 120-150 GeV/c polarized proton beam. It also contains an updated discussion of the Modifications and Hardware needed for a polarized beam in the Main Injector, along with an updated Schedule and Budget. Read More

**Authors:**D. Boer, M. Diehl, R. Milner, R. Venugopalan, W. Vogelsang, A. Accardi, E. Aschenauer, M. Burkardt, R. Ent, V. Guzey, D. Hasch, K. Kumar, M. A. C. Lamont, Y. Li, W. J. Marciano, C. Marquet, F. Sabatie, M. Stratmann, F. Yuan, S. Abeyratne, S. Ahmed, C. Aidala, S. Alekhin, M. Anselmino, H. Avakian, A. Bacchetta, J. Bartels, H. BC, J. Beebe-Wang, S. Belomestnykh, I. Ben-Zvi, G. Beuf, J. Blumlein, M . Blaskiewicz, A. Bogacz, S. J. Brodsky, T. Burton, R. Calaga, X. Chang, I. O. Cherednikov, P. Chevtsov, G. A. Chirilli, C. Ciofi degli Atti, I. C. Cloet, A. Cooper-Sarkar, R. Debbe, Ya. Derbenev, A. Deshpande, F. Dominguez, A. Dumitru, R. Dupre, B. Erdelyi, C. Faroughy, S. Fazio, A. Fedotov, J. R. Forshaw, R. Geraud, K. Gallmeister, L. Gamberg, J. -H. Gao, D. Gassner, F. Gelis, G. P. Gilfoyle, G. Goldstein, K. Golec-Biernat, V. P. Goncalves, M. Gonderinger, M. Guzzi, P. Hagler, H. Hahn, L. Hammons, Y. Hao, P. He, T. Horn, W. A. Horowitz, M. Huang, A. Hutton, B. Jager, W. Jackson, A. Jain, E. C. Johnson, Z. -B. Kang, L. P. Kaptari, D. Kayran, J. Kewisch, Y. Koike, A. Kondratenko, B. Z. Kopeliovich, Y. V. Kovchegov, G. Krafft, P. Kroll, S. Kumano, K. Kumericki, T. Lappi, T. Lautenschlager, R. Li, Z. -T. Liang, V. N. Litvinenko, S. Liuti, Y. Luo, D. Muller, G. Mahler, A. Majumder, S. Manikonda, F. Marhauser, G. McIntyre, M. Meskauskas, W. Meng, A. Metz, C. B. Mezzetti, G. A. Miller, M. Minty, S. -O. Moch, V. Morozov, U. Mosel, L. Motyka, H. Moutarde, P. J. Mulders, B. Musch, P. Nadel-Turonski, P. Nadolsky, F. Olness, P. N. Ostrumov, B. Parker, B. Pasquini, K. Passek-Kumericki, A. Pikin, F. Pilat, B. Pire, H. Pirner, C. Pisano, E. Pozdeyev, A. Prokudin, V. Ptitsyn, X. Qian, J. -W. Qiu, M. Radici, A. Radyushkin, T. Rao, R. Rimmer, F. Ringer, S. Riordan, T. Rogers, J. Rojo, T. Roser, R. Sandapen, R. Sassot, T. Satogata, H. Sayed, A. Schafer, G. Schnell, P. Schweitzer, B. Sheehy, J. Skaritka, G. Soyez, M. Spata, H. Spiesberger, A. M. Stasto, N. G. Stefanis, M. Strikman, M. Sullivan, L. Szymanowski, K. Tanaka, S. Taneja, S. Tepikian, B. Terzic, Y. Than, T. Toll, D. Trbojevic, E. Tsentalovich, N. Tsoupas, K. Tuchin, J. Tuozzolo, T. Ullrich, A. Vossen, S. Wallon, G. Wang, H. Wang, X. -N. Wang, S. Webb, C. Weiss, Q. Wu, B. -W. Xiao, W. Xu, B. Yunn, A. Zelenski, Y. Zhang, J. Zhou, P. Zurita

This report is based on a ten-week program on "Gluons and the quark sea at high-energies", which took place at the Institute for Nuclear Theory in Seattle in Fall 2010. The principal aim of the program was to develop and sharpen the science case for an Electron-Ion Collider (EIC), a facility that will be able to collide electrons and positrons with polarized protons and with light to heavy nuclei at high energies, offering unprecedented possibilities for in-depth studies of quantum chromodynamics. This report is organized around four major themes: i) the spin and flavor structure of the proton, ii) three-dimensional structure of nucleons and nuclei in momentum and configuration space, iii) QCD matter in nuclei, and iv) Electroweak physics and the search for physics beyond the Standard Model. Read More

We study a model of dephasing (decoherence) in a two-state quantum system (qubit) coupled to a bath of harmonic oscillators. An exact analytic solution for the reduced dynamics of a two-state system in this model has been obtained previously for factorizing initial states of the combined system. We show that the model admits exact solutions for a large class of correlated initial states which are typical in the theory of quantum measurements. Read More

The problem of the helix-coil transition of biopolymers in explicit solvents, like water, with the ability for hydrogen bonding with solvent is addressed analytically using a suitably modified version of the Generalized Model of Polypeptide Chains. Besides the regular helix-coil transition, an additional coil-helix or reentrant transition is also found at lower temperatures. The reentrant transition arises due to competition between polymer-polymer and polymer-water hydrogen bonds. Read More

A microscopic spin model is proposed for the phenomenological Zimm-Bragg model for the helix-coil transition in biopolymers. This model is shown to provide the same thermophysical properties of the original Zimm-Bragg model and it allows a very convenient framework to compute statistical quantities. Physical origins of this spin model are made transparent by an exact mapping into a one-dimensional Ising model with an external field. Read More

**Authors:**V. S. Morozov

^{1}, A. W. Chao

^{2}, A. D. Krisch

^{3}, M. A. Leonova

^{4}, J. Liu

^{5}, R. S. Raymond

^{6}, D. W. Sivers

^{7}, V. K. Wong

^{8}, A. M. Kondratenko

^{9}

**Affiliations:**

^{1}Michigan,

^{2}Michigan,

^{3}Michigan,

^{4}Michigan,

^{5}Michigan,

^{6}Michigan,

^{7}Michigan,

^{8}Michigan,

^{9}Novosibrisk

**Category:**Physics - Accelerator Physics

We recently used an rf solenoid to study the widths of rf spin resonances with both unbunched and bunched beams of 2.1 GeV_c polarized protons stored in the COSY synchrotron. A map, with unbunched beam at different fixed rf-solenoid frequencies, showed a very shallow possible depolarization dip at the resonance. Read More

Many-particle QED is applied to kinetic theory of radiative processes in many- component plasmas with relativistic electrons and nonrelativistic heavy particles. Within the framework of nonequilibrium Green's function technique, transport and mass-shell equations for fluctuations of the electromagnetic field are obtained. We show that the transverse field correlation functions can be decomposed into sharply peaked (non-Lorentzian) parts that describe resonant (propagating) photons and off-shell parts corresponding to virtual photons in plasmas. Read More

**Authors:**M. A. Leonova, A. W. Chao, E. D. Courant, A. D. Krisch, V. S. Morozov, R. S. Raymond, D. W. Sivers, J. M. Williams, V. K. Wong, A. Garishvili, R. Gebel, A. Lehrach, B. Lorentz, R. Maier, D. Prasuhn, H. Stockhorst, D. Welsch, F. Hinterberger, K. Ulbrich, Ya. S. Derbenev, A. M. Kondratenko, Y. F. Orlov, E. J. Stephenson, N. P. M. Brantjes, C. J. G. Onderwater, M. da Silva

**Category:**Physics - Accelerator Physics

This submission was withdrawn because of an unresolved dispute between the authors [arXiv admin 2009-4-13]. Read More

In this article, we describe a new method of extracting information from signals, called functional dissipation, that proves to be very effective for enhancing classification of high resolution, texture-rich data. Our algorithm bypasses to some extent the need to have very specialized feature extraction techniques, and can potentially be used as an intermediate, feature enhancement step in any classification scheme. Functional dissipation is based on signal transforms, but uses the transforms recursively to uncover new features. Read More

In this paper we summarize some results of our theoretical investigations of helix-coil transition both in single-strand (polypeptides) and two-strand (polynucleotides) macromolecules. The Hamiltonian does not contain any parameter designed especially for helix-coil transition and uses pure molecular microscopic parameters. To calculate averages we evaluate the partition function using transfer-matrix approach. Read More

By taking into account base-base stacking interactions we improve the Generalized Model of Polypeptide Chain (GMPC). Based on a one-dimensional Potts-like model with many-particle interactions, the GMPC describes the helix-coil transition in both polypeptides and polynucleotides. In the framework of the GMPC we show that correctly introduced nearest-neighbor stacking interactions against the background of hydrogen bonding lead to increased stability (melting temperature) and, unexpectedly, to decreased cooperativity (maximal correlation length). Read More

This thesis presents a measurement of the cross-section of the purely electromagnetic production of $e^+e^-$ pairs accompanied by mutual nuclear Coulomb excitation $AuAu\to Au^*Au^*+e^+e^-$, in ultra-peripheral gold-gold collisions at RHIC at the center-of-mass collision energy of $\sqrt{s_{NN}} = 200$ GeV per nucleon. These reactions were selected by detecting neutron emission by the excited gold ions in the Zero Degree Calorimeters. The charged tracks in the $e^+e^-$ events were reconstructed with the STAR Time Projection Chamber. Read More

A simplified model for the closed circular DNA (ccDNA) is proposed to describe some specific features of the helix-coil transition in such molecule. The Hamiltonian of ccDNA is related to the one introduced earlier for the linear DNA. The basic assumption is that the reduced energy of the hydrogen bond is not constant through the transition process but depends effectively on the fraction of already broken bonds. Read More

We report measurements for coherent rho^0 production, AuAu->AuAu rho^0, and coherent rho^0 and e^+e^- pair production accompanied by mutual nuclear Coulomb excitation, AuAu->Au*Au* rho^0 and AuAuee, in ultra-peripheral relativistic gold-gold collisions (UPC). We discuss transverse momentum, mass, and rapidity distributions. The two photon-process of e^+e^- pair production is an important probe of strong field QED because of the large coupling Z*alpha=0. Read More

We start from the QED Lagrangian to describe a charged many-particle system coupled to the radiation field. A covariant density matrix approach to kinetic theory of QED plasmas, subjected to a strong external electro-magnetic field has recently been developed [1,2]. We use the hyperplane formalism in order to perform a manifest covariant quantization and to implement initial correlations to the solution of the Liouville-von Neumann equation. Read More

Starting from a general relativistic kinetic equation, a self-consistent mean-field equation for fermions is derived within a covariant density matrix approach of QED plasmas in strong external fields. A Schr\"odinger picture formulation on space-like hyperplanes is applied. The evolution of the distribution function is described by the one-particle gauge-invariant 4x4 Wigner matrix, which is decomposed in spinor space. Read More

We develop a covariant density matrix approach to kinetic theory of QED plasmas subjected into a strong external electromagnetic field. A canonical quantization of the system on space-like hyperplanes in Minkowski space and a covariant generalization of the Coulomb gauge is used. The condensate mode associated with the mean electromagnetic field is separated from the photon degrees of freedom by a time-dependent unitary transformation of both, the dynamical variables and the nonequilibrium statistical operator. Read More

**Affiliations:**

^{1}MIREA Moscow,

^{2}Rostock

**Category:**Physics - Statistical Mechanics

A link between memory effects in quantum kinetic equations and nonequilibrium correlations associated with the energy conservation is investigated. In order that the energy be conserved by an approximate collision integral, the one-particle distribution function and the mean interaction energy are treated as independent nonequilibrium state parameters. The density operator method is used to derive a kinetic equation in second-order non-Markovian Born approximation and an evolution equation for the nonequilibrium quasi-temperature which is thermodynamically conjugated to the mean interaction energy. Read More

The short-time dynamics of correlated systems is strongly influenced by initial correlations giving rise to an additional collision integral in the non-Markovian kinetic equation. Exact cancellation of the two integrals is found if the initial state is thermal equilibrium which is an important consistency criterion. Analytical results are given for the time evolution of the correlation energy which are confirmed by comparisons with molecular dynamics simulations (MD). Read More

A method for deriving quantum kinetic equations with initial correlations is developed on the basis of the nonequilibrium Green's function formalism. The method is applicable to a wide range of correlated initial states described by nonequilibrium statistical thermodynamics. Initial correlations and the real-time evolution are treated by a unified technique employing many-component ``mixed'' Green's functions. Read More

Using charged hard spheres model as an example, the dense one-component plasma is considered. For this model the Enskog-Landau kinetic equation is obtained and its normal solution is found using the Chapman-Enskog method. Transport coefficients are obtained numerically and analytically and compared with the experimental data available. Read More

The some dynamic properties of a random heteropolymer in the condensed state are studied in the mode coupling approximation. In agreement with recent report a dynamic friction increasing is predicted for the random heteropolymer with power-law correlations in comparison with exponential correlations. In the case of strong power-law correlations the dynamic friction function diverge in the thermodynamic limit. Read More

We study random heteropolymer chain with gaussian distribution of kinds of monomers. The long-range correlations between kinds of monomers were introduce. The mean-field analysis of such heteropolymer indicates the existence of infinite energetic barrier between heteropolymer random coil and frozen states. Read More