Localisation determines the optimal noise rate for quantum transport
Localisation determines the optimal noise rate for quantum transport
复制标题
定位决定了量子传输的最佳噪声率
DOI:
10.1088/1367-2630/ac3b2c
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发表时间:
2021
影响因子:
3.3
通讯作者:
Coates A
中科院分区:
文献类型:
--
作者:
Coates A
Environmental noise plays a key role in determining the efficiency of transport in quantum systems. However, disorder and localisation alter the impact of such noise on energy transport. To provide a deeper understanding of this relationship we perform a systematic study of the connection between eigenstate localisation and the optimal dephasing rate in 1D chains. The effects of energy gradients and disorder on chains of various lengths are evaluated and we demonstrate how optimal transport efficiency is determined by both size-independent, as well as size-dependent factors. By discussing how size-dependent influences emerge from finite size effects we establish when these effects are suppressed, and show that a simple power law captures the interplay between size-dependent and size-independent responses. Moving beyond phenomenological pure dephasing, we implement a finite temperature Bloch–Redfield model that captures detailed balance. We show that the relationship between localisation and optimal environmental coupling strength continues to apply at intermediate and high temperature but breaks down in the low temperature limit.
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DOI:
10.48550/arxiv.1508.04744
发表时间:
2015
期刊:
--
影响因子:
--
作者:
Eastham P
通讯作者:
Eastham P
影响因子:
4.2
作者:
Elinor Zerah;Y. Dubi
通讯作者:
Y. Dubi
DOI:
--
发表时间:
2016
期刊:
影响因子:
--
作者:
Richard Stones;A. Olaya
通讯作者:
A. Olaya
影响因子:
2.9
作者:
Dwiputra, Donny;Zen, Freddy P.
通讯作者:
Zen, Freddy P.
影响因子:
4.2
作者:
S. Davidson;F. A. Pollock;E. Gauger
通讯作者:
S. Davidson;F. A. Pollock;E. Gauger