
Prof.
Dr. Boris Fine
Dynamicstostatistics and quantumtoclassical transition in nonequilibrium manybody systems; chaos, decoherence, foundations of quantum statistical physics; Spin dynamics, spinspin relaxation in nuclear magnetic resonance (NMR); Hightemperature
superconductivity, spin and chargedensity waves in strongly
correlated electronic systems 
Members
of the group:
Anastasia Aristova  Ph.D. student
Louisa Dreyer  Bachelor student
Jan Finke  Bachelor student
Philipp Zikeli  Bachelor student
Maximillian Zoschke  Bachelor student
Selected publications and preprints:
I. Ermakov, O. Lychkovskiy, B. V. Fine, Periodic classical trajectories and quantum scars in manyspin systems, preprint arXiv:2409.00258 (2024)
A. E. Tarkhov, A. V. Rozhkov and B. V. Fine, Transient ordering in the GrossPitaevskii lattice after an energy quench within a nonordered phase, Phys. Rev. B Letters 106, L201110 (2022)
W. Hahn and B.V. Fine, Attraction Induced by Mutual Quantum Measurements of Velocity, AIP Conference Proceedings 2362, 040004 (2021) , eprint arXiv:1903.09065
A. Zong, A. Kogar, Y.Q. Bie, T. Rohwer, Ch. Lee, E. Baldini, E. Ergeçen, M. B. Yilmaz, B. Freelon, E. J. Sie, H. Zhou, J. Straquadine, P. Walmsley, P. E. Dolgirev, A. V. Rozhkov, I. R. Fisher, P. JarilloHerrero, B. V. Fine, N. Gedik, Evidence of topological defects in a photoinduced phase transition, Nature Physics 15, 27 (2019)
G. A. Starkov, B. V. Fine , Hybrid quantumclassical method for simulating hightemperature dynamics of nuclear spins in solids, Physical Review B 98, 214421 (2018)
A.A. E. Tarkhov, B. V. Fine, Estimating ergodization time of a chaotic manyparticle system from a time reversal of equilibrium noise, New J. Phys. 20 123021 (2018)
W. Hahn, B.V. Fine, Stability of quantum statistical ensembles with respect to local measurements, Phys. Rev. E 94, 062106 (2016)
B. V. Fine, Comment on “Broken translational and rotational symmetry via charge stripe order in underdoped YBa2Cu3O6+y”, Science 351, 235a (2016)
T. A. Elsayed and B. V. Fine, Sensitivity to small perturbations in systems of large quantum spins, Phys. Scr. 2015 014011, (2015)
T. A. Elsayed and B. V. Fine, Effectiveness of classical spin simulations for describing NMR relaxation of quantum spins, Phys. Rev. B 91, 094424 (2015)
T. A. Elsayed, B. Hess and B. V. Fine, Signatures of chaos in time series generated by manyspin systems at high temperatures, Phys. Rev. E 90, 022910 (2014)
B. V. Fine, T. A. Elsayed, C. M. Kropf, and A. S. de Wijn, Absence of exponential sensitivity to small perturbations in nonintegrable systems of spins 1/2, Phys. Rev. E 89, 012923 (2014)
A. S. de Wijn, B. Hess, and B. V. Fine, Lyapunov instabilities in lattices of interacting classical spins at infinite temperature, J. Phys. A: Math. Theor. 46 254012 (2013)
T. A. Elsayed, B. V. Fine, Regression relation for pure quantum states and its implications for efficient computing, Phys. Rev. Lett. 110, 070404 (2013)
C. M. Kropf and B. V. Fine, Nonsecular resonances for the coupling between nuclear spins in solids, Phys. Rev. B 86, 094401 (2012)
A. S. de Wijn, B. Hess and B. V. Fine, Largest Lyapunov exponents for the lattices of interacting classical spins, Phys. Rev. Lett. 109, 034101 (2012)
K. Ji and B. V. Fine, Nonthermal statistics in isolated quantum spin clusters after a series of perturbations, Phys. Rev. Lett. 107, 050401 (2011)
B. V. Fine, Typical state of an isolated quantum system with fixed energy and unrestricted participation of eigenstates, Phys. Rev. E 80, 051130 (2009)
S. W. Morgan, B. V. Fine, and B. Saam, Universal LongTime Behavior of Nuclear Spin Decays in a Solid, Phys. Rev. Lett. 101, 067601 (2008)
B. V. Fine and T. Egami, Phase separation in the vicinity of quantumcritical doping concentration: Implications for hightemperature superconductors, Phys. Rev. B 77, 014519 (2008)
B. V. Fine, Magnetic vortices instead of stripes: another interpretation of magnetic neutron scattering in lanthanum cuprates, Phys. Rev. B 75, 060504 (2007)
B.V. Fine, Longtime behavior of spin echo, Phys. Rev. Lett. 94, 247601 (2005)
B. V. Fine, F. Mintert and A. Buchleitner, Equilibrium entanglement vanishes at finite temperature, Phys. Rev. B 71, 153105 (2005)
B. V. Fine, LongTime Relaxation on Spin Lattice as a Manifestation of Chaotic Dynamics , Int. J. Mod. Phys. B 18, 1119 (2004)
B. V. Fine, Hypothesis of twodimensional stripe arrangement and its implications for the superconductivity in highTc cuprates, Phys. Rev. B 70, 224508 (2004)
For
a popular description of some of my research, see news
highlights:
ScienceDaily:
"Quantum
Chaos Unveiled?"
Office:
Institute
for Theoretical Physics
Brüderstr. 16
04103
Leipzig
Germany
Room: 115
Tel: +49
341 97 32465
Email:
boris.fine(at)unileipzig.de