Research interests of Boris Fine



General interests
In pictures

Dynamics-to-statistics and quantum-to-classical transition in nonequilibrium many-body
systems;
chaos, decoherence, foundations of quantum mechanics;

Spin dynamics;
Spin-spin relaxation in nuclear magnetic resonance (NMR).



Trajectories of 5 interacting classical spins
(courtesy of Alex Kohler)


Identical long-time behavior of different NMR signals 
[predicted in B.V.Fine, Phys. Rev. Lett. 94, 247601 (2005) ;
measured in S. W. Morgan, B.V. Fine, B.Saam, accepted to Phys.Rev. Lett. (2008)]

High-temperature superconductivity

Stripes/inhomogeneities in high-Tc cuprates




Possible magnetic superstructure observed in "stripe" experiments.
[B.V. Fine, Phys. Rev. B 75, 060504 (2007)]


1/f noise

in particular in amorphous silicon


Deep defects in random potential landscape cause long-range Coulomb fluctuations, thereby leading to 1/f noise.
[B. V. Fine,  J. P. R. Bakker and J. I. Dijkhuis,  Phys. Rev.  B 68, 125207 (2003) ]


PUBLICATIONS:
 

1) B. V. Fine, NMR Spin-Spin Relaxation as Kinetics in Spin Phase Space , Phys.Rev.Lett. 79, 4673 (1997) (e-print cond-mat/9707249).
 

2) B. V. Fine, Theory of high-temperature spin dynamics, Ph. D. thesis, University of Illinois at Urbana-Champaign, (2000), 
http://research.physics.uiuc.edu/Publications/theses/copies/fine.ps   .
 

3) J. P. R. Bakker,  P. J. S. van Capel, B. V. Fine, and J. I. Dijkhuis, Generaration-Recombination noise in a-Si:H Studied by Device Simulations, MRS Proceedings 715, A2.6, (2002), http://web.utk.edu/~bfine/mrs2002.doc
 

4) B. V. Fine, Universal Long-Time Relaxation on the Lattice of Classical Spins: Markovian Behavior on non-Markovian Timescales, J. Stat. Phys.  112, 319 (2003) (e-print cond-mat/9911229).
 

5) B. V. Fine,  J. P. R. Bakker and J. I. Dijkhuis,  Long-range potential fluctuations and 1/f noise in hydrogenated  amorphous silicon, Phys. Rev.  B 68, 125207 (2003) (e-print cond-mat/0210680 ).
 

6) J. P. R. Bakker,  P. J. S. van Capel, B. V. Fine, and J. I. Dijkhuis, New experimental evidence for the role of long-range potential fluctuations in the mechanism of 1/f noise in a-Si:HJ. Non-Cryst. Solids 338-340, 310 (2004),  (e-print cond-mat/0310468 )
 

7) B. V. Fine, Hypothesis of two-dimensional stripe arrangement and its implications for the superconductivity in high-Tc cupratesPhys. Rev. B 70, 224508 (2004),  (e-print cond-mat/0308428 ).
 

8) B. V. Fine, Long-Time Relaxation on Spin Lattice as a Manifestation of Chaotic Dynamics ,
Int. J. Mod. Phys. B 18, 1119 (2004), (e-print cond-mat/9911230).
 

9) B. V. Fine,  J. P. R. Bakker and J. I. Dijkhuis,  Long-range  fluctuations of random potential landscape as a mechanism of 1/f noise in hydrogenated  amorphous silicon , Fluctuations and Noise Letters 5L443-L456 (2005), preprint  http://web.utk.edu/~bfine/fnl.pdf
 

10) B. V. Fine,  Superconductivity in the background of two-dimensional stripe superstructure,   in "New Challenges in Superconductivity: Experimental Advances and Emerging Theories", edited by J. Ashkenazi, M.V. Eremin, J. L. Cohn, I. Eremin, D. Manske, D. Pavuna, and F. Zuo (Kluwer Academic Publishers), pp. 159-164 (2004), (e-print  cond-mat/0404488).

11) B. V. Fine, F. Mintert and A. Buchleitner, Equilibrium entanglement vanishes at finite temperature,
Phys. Rev. B 71, 153105 (2005),  (e-print cond-mat/0505739 ). 

12) B. V. Fine, Temperature dependence of the superconducting gap in high-Tc cuprates,
Phys. Rev. Lett. 94, 157005 (2005) (e-print cond-mat/0408211).

13) B.V. Fine, Long-time behavior of spin echo, Phys. Rev. Lett. 94, 247601 (2005) (e-print cond-mat/0411345).
 
14) B. V. Fine,  Interpretation of low-temperature nuclear quadrupole resonance spectra in La(1.875)Ba(0.125)CuO(4) in terms of two-dimensional spin superstructure, submitted  to Phys. Rev. B (e-print  cond-mat/0606300)

15) B. V. Fine, Magnetic vortices instead of stripes: another interpretation of magnetic neutron scattering in lanthanum cuprates, Phys. Rev. B 75, 060504 (2007) (eprint cond-mat/0610748)

16) B. V. Fine and T. Egami, Phase separation in the vicinity of quantum-critical doping concentration: Implications for high-temperature superconductors, accepted to Phys. Rev. B (2008) (eprint arXive:0707.3994 )