TITLE

Quantum relaxation in high density fermion and boson tunneling dynamics: Implications for low temperature anomalous surface diffusion

AUTHOR(S)
Zhang, Qing; Whaley, K. Birgitta
PUB. DATE
July 1991
SOURCE
Journal of Chemical Physics;7/15/1991, Vol. 95 Issue 2, p1417
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Quantum relaxation behavior for many-particle tunneling systems of interacting identical particles is studied for both fermions and bosons within the infinite U Hubbard model, using a numerically exact checkerboard time propagation. Dependence of relaxation times upon vacancy concentration is obtained, and conclusions for nuclear statistical effects in hydrogen surface diffusion presented.
ACCESSION #
7639437

 

Related Articles

  • The extent of quantum critical fluctuations into the heavy-fermion phase: A neutron scattering study of Ce(Ru1-xFex)2Ge2. Montfrooij, W.; Aronson, M. C.; Rainford, B. D.; Mydosh, J. A.; Hendrikx, R.; Gortenmuller, T.; Murani, A. P.; Haen, P.; Swainson, I. // Journal of Applied Physics;5/15/2005, Vol. 97 Issue 10, p10P508 

    We present inelastic neutron scattering measurements on the heavy-fermion compound Ce(Ru1-xFex)2Ge2 (x=0.87). This composition is close to the quantum critical point (QCP) compound (x=0.76) in which it was observed that the decay of spin fluctuations could no longer be described by a simple...

  • Dielectric Relaxation in SrTiO3 : Mn. Lemanov, V. V.; Smirnova, E. P.; Sotnikov, A. V.; M. Weihnacht // Physics of the Solid State;Aug2004, Vol. 46 Issue 8, p1442 

    Dielectric relaxation (activation energy U≈0.03 eV, relaxation time τ0≈5×10–11 s) has been observed in SrTiO3 : Mn solid solutions at low temperatures. It is assumed that the relaxation is related to reorientation of the polarons localized at defects of the...

  • Quantum Particles from Classical Probabilities in Phase Space. Wetterich, C. // International Journal of Theoretical Physics;Oct2012, Vol. 51 Issue 10, p3236 

    Quantum particles in a potential are described by classical statistical probabilities. We formulate a basic time evolution law for the probability distribution of classical position and momentum such that all known quantum phenomena follow, including interference or tunneling. The appropriate...

  • Vibrational energy relaxation in the condensed phases: Quantum vs classical bath for multiphonon... Egorov, S.A.; Berne, B.J. // Journal of Chemical Physics;10/22/1997, Vol. 107 Issue 16, p6050 

    Discusses the development of a theory for relating quantum and classical time correlation functions in the context of vibrational energy relaxation. Assumed characteristics of the classical system; Proposed approximation quantum correction; Estimation of the vibrational relaxation time by a...

  • Device Structures Based on Resonant Tunneling Diodes: A Theoretical Consideration. Abramov, I. I.; Korolev, A. V. // Technical Physics;Sep2001, Vol. 46 Issue 9, p1190 

    Simple device structures incorporating resonant tunneling diodes (RTDs) are considered in terms of electrical models and the EC-RTS-NANODEV software suite. It is shown that the structures can be used in multilevel logic, frequency converters, and generators of harmonic, relaxation, and chaotic...

  • Relaxation of spin quantum number S=3/2 under multiple-pulse quadrupolar echoes. van der Maarel, J. R. C. // Journal of Chemical Physics;4/1/1991, Vol. 94 Issue 7, p4765 

    The time evolution of the spin S=3/2 density operator due to relaxation in the presence of a sequence of (Ï€/2) pulses has been calculated using perturbation theory in an interaction representation in which no external time-dependent rf fields occur. It is shown that the relaxation under the...

  • The effects of molecular diffusion in ultrafast two-dimensional nuclear magnetic resonance. Shrot, Yoav; Frydman, Lucio // Journal of Chemical Physics;4/28/2008, Vol. 128 Issue 16, p164513 

    The so-called “ultrafast” nuclear magnetic resonance (NMR) methods enable the collection of multidimensional spectra within a single scan. These experiments operate by replacing traditional t1 time increments, with a series of combined...

  • Quasi-Particle Localization by Disorder in v = 5/2 Fractional Quantum Hall State and Its Potential Application. GOSWAMI, P. // Acta Physica Polonica, A.;Oct2012, Vol. 122 Issue 4, p741 

    We consider the filling factor 5/2 fractional quantum Hall state of spin-polarized fermions in a dirty (mobility μb < 10 m2 V-1 s-1) bi-layer quantum well system.We show that the system undergoes a quantum phase transition from the effective two-component state to an effective...

  • Mean first passage time solution of the Smoluchowski equation: Application to relaxation dynamics in myoglobin. Ansari, Anjum // Journal of Chemical Physics;2/1/2000, Vol. 112 Issue 5 

    A robust numerical approach to solving the Smoluchowski equation describing a diffusive process is presented for the case where standard procedures are not so useful, in particular, diffusion along a spatially rough potential. The approach developed here makes use of an analytical expression for...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics