Interference nature of quantum breather oscillation
Interference nature of quantum breather oscillation
复制标题
量子呼吸振荡的干涉性质
DOI:
10.1088/1751-8113/47/16/165102
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发表时间:
2014
期刊:
影响因子:
--
通讯作者:
F. Großmann
中科院分区:
文献类型:
--
作者:
C. Zagoya;L. S. Schulman;F. Großmann
In a system of coupled nonlinear oscillators, the breather (or local mode) solution is studied fully quantum mechanically, as well as by a semiclassical initial value representation of the propagator and classical Wigner dynamics. We show that the initial breather state is a superposition of almost degenerate eigenstates. From this simple observation it follows that the breather must decay and revive (ie, oscillate with energy localization for extended times). Numerical results are shown for a two degree of freedom system. The fact that the semiclassical real-time result reproduces the full quantum one to a large degree, whereas the classical Wigner dynamics based on a similar set of trajectories does not, indicates that the breather oscillation can be viewed as an interference phenomenon.
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