Monitoring quantum Otto engines


  • Juzar Thingna Center for Theoretical Physics of Complex Systems, Institute for Basic Science, Republic of Korea


In this talk, I will introduce a method, known as repeated contacts, that allows us to infer the sum of the values of an observable taken during contacts with a pointer state. I will first show the superiority of this approach with the results of the same number of generalized Gaussian measurements of the considered observable. The proposed repeated contact approach could be beneficial to measure the work output of a quantum Otto heat engine and I'll demonstrate this using a two-level system as the working substance. I'll discuss the imperfect thermalizing engine under Landau-Zener work strokes and show that the repeated contact scheme is minimally invasive and gives enhanced performance metrics (efficiency, power output, and reliability) as compared to the standard repeated generalized Gaussian measurements. Overall, I'll show the importance of considering the effects of quantum measurements using different measurement protocols on the performance of a machine.

About the Speaker

Juzar Thingna, Center for Theoretical Physics of Complex Systems, Institute for Basic Science, Republic of Korea

Juzar Thingna is a Young Scientist Fellow at the Center for Theoretical Physics for Complex Systems (PCS) of the Institute for Basic Science (IBS), Daejeon, South Korea. Before moving to South Korea, he was a post-doctoral researcher at the University of Luxembourg, Singapore-MIT Alliance for Research and Technology, and University of Augsburg (Germany) investigating several dynamic and thermodynamic facets of driven and autonomous open quantum systems far from equilibrium. He obtained his Ph.D. from the National University of Singapore in 2013 understanding quantum heat transport in strongly interacting molecular junctions. His current work focuses on quantum machines, quantum thermodynamics, collective behavior, fundamentals of open quantum systems, and quantum transport.



Article ID



Invited Presentations



How to Cite

J Thingna, Monitoring quantum Otto engines, Proceedings of the Samahang Pisika ng Pilipinas 39, SPP-2021-INV-2A-01 (2021). URL: