|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'504'585
Articles rated: 2609
25 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
Nonequilibrium phase transition in transport through a driven quantum point contact | | Oleksandr Gamayun
; Artur Slobodeniuk
; Jean-Sébastien Caux
; Oleg Lychkovskiy
; | | Date: |
3 Jun 2020 | | Abstract: | We study transport of noninteracting fermions through a periodically driven
quantum point contact (QPC) connecting two tight-binding chains. Initially each
chain is prepared in its own equilibrium state, generally with a bias between
the chains. We examine the heating rate (or, alternatively, energy increase per
cycle) in the nonequilibrium time-periodic steady state established after
initial transient dynamics. We find that the heating rate vanishes identically
when the driving frequency exceeds the bandwidth of the chain. We first
establish this fact for a particular type of QPC where the heating rate can be
calculated analytically. Then we verify numerically that this nonequilibrium
phase transition is present for a generic QPC. Finally, we derive this effect
perturbatively in leading order for cases when the QPC Hamiltonian can be
viewed as a small perturbation. Strikingly, we discover that for certain QPCs
the current averaged over the driving cycle also vanishes above the critical
frequency, despite a persistent voltage bias. This shows that a driven QPC can
act as a frequency-controlled quantum valve. | | Source: | arXiv, 2006.2400 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
|
News, job offers and information for researchers and scientists:
| |
REGISTER