Current fluctuations in boundary-driven quantum spin chains
Current fluctuations in boundary-driven quantum spin chains
复制标题
边界驱动的量子自旋链中的电流波动
DOI:
10.1103/physrevb.98.094301
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发表时间:
2018
影响因子:
3.7
通讯作者:
Carollo F
中科院分区:
文献类型:
--
作者:
Carollo F
Boundary-driven quantum spin chains are paradigmatic nonequilibrium systems featuring the presence of particle currents. In general, it may not be possible to distinguish an incoherent type of particle transport from a truly quantum coherent one through monitoring the mean current, as both ballistic as well as diffusive regimes occur in either setting. Here, we show that genuine coherent features become manifest in large fluctuations which allow a discrimination between incoherent and coherent quantum transport: in the former case, realizations that are characterized by atypically large boundary activity are associated with larger than typical currents, i.e., an enhanced number of events at the boundaries goes together with a large current. Conversely, in the coherent case the Zeno effect leads to the suppression of current in trajectories with large activity at the boundary. We analyze how these different dynamical regimes are reflected in the structure of rare fluctuations. We show moreover that realizations supporting a large current are generated via weak long-range correlations within the spin chain, typically associated with hyperuniformity. We further observe critical time-coexistence behaviors with intermittent currents in rare fluctuations of the strongly interacting XXZ chain for completely asymmetric drivings.
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影响因子:
8.6
作者:
D. Karevski;G. Schütz
通讯作者:
G. Schütz
影响因子:
2.4
作者:
Carlos P. Espigares;P. Garrido;P. Hurtado
通讯作者:
P. Hurtado
DOI:
--
发表时间:
2010
期刊:
影响因子:
--
作者:
V. Popkov;G. Schütz
通讯作者:
G. Schütz
DOI:
10.1088/1742-5468/2016/03/033104
发表时间:
2015
期刊:
Journal of Statistical Mechanics: Theory and Experiment
影响因子:
--
作者:
D. Bernard;B. Doyon
通讯作者:
B. Doyon
DOI:
10.1088/1742-5468/2011/06/p06007
发表时间:
2011-06-01
影响因子:
2.4
作者:
Eisler, Viktor
通讯作者:
Eisler, Viktor