4.6 Article

Bath Engineering Enhanced Quantum Critical Engines

期刊

ENTROPY
卷 24, 期 10, 页码 -

出版社

MDPI
DOI: 10.3390/e24101458

关键词

quantum thermodynamics; quantum heat engines; quantum control; quantum phase transitions; Kibble-Zurek mechanism

资金

  1. Science and Engineering Research Board (SERB) through MATRICS [MTR/2021/000055]
  2. IISER Berhampur

向作者/读者索取更多资源

In this study, a bath-engineered quantum engine (BEQE) is proposed to enhance the performance of finite-time quantum engines operating close to quantum phase transitions. By using the Kibble-Zurek mechanism and critical scaling laws, a protocol is formulated. In the case of free fermionic systems, BEQE enables finite-time engines to outperform engines operating in the presence of shortcuts to adiabaticity.
Driving a quantum system across quantum critical points leads to non-adiabatic excitations in the system. This in turn may adversely affect the functioning of a quantum machine which uses a quantum critical substance as its working medium. Here we propose a bath-engineered quantum engine (BEQE), in which we use the Kibble-Zurek mechanism and critical scaling laws to formulate a protocol for enhancing the performance of finite-time quantum engines operating close to quantum phase transitions. In the case of free fermionic systems, BEQE enables finite-time engines to outperform engines operating in the presence of shortcuts to adiabaticity, and even infinite-time engines under suitable conditions, thus showing the remarkable advantages offered by this technique. Open questions remain regarding the use of BEQE based on non-integrable models.

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