Speaker: Keiji Ono , and Sergey N. Shevchenko (RIKEN)

Date: Jan. 12th 17:00-

Style: Webinar via ZOOM

Title: Analog of a Quantum Heat Engine Using a Single-Spin Qubit

Abstract: A quantum two-level system with periodically modulated energy splitting could provide a minimal universal quantum heat machine. We present the experimental realization and the theoretical description of such a two-level system as an impurity electron spin in a silicon tunnel field-effect transistor. In the incoherent regime, the system can behave analogously to either an Otto heat engine or a refrigerator. The coherent regime could be described as a superposition of those two regimes, producing specific interference fringes in the observed source-drain current[1].

At the seminar, Ono and Shevchenko will introduce the experimental and theoretical aspects of this work, respectively. Related works will also be introduced [2,3].

[1] K. Ono, S. N. Shevchenko, et al, Phys. Lev. Lett. 125, 166802, (2020).

[2] K. Ono, S. N. Shevchenko, et al, Phys. Rev. Lett. 122, 207703, (2019).

[3] K. Ono, et al, Scientific reports 9, 469, (2019).