Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session AAA06: V: Topological Qubits and Quantum Thermodynamics
12:30 PM–2:30 PM,
Wednesday, March 22, 2023
Room: Virtual Room 6
Sponsoring
Unit:
DQI
Chair: Tanuj Khattar
Abstract: AAA06.00004 : Creating adiabatic cat states of topologically coupled quantum modes
1:30 PM–1:42 PM
Presenter:
Jacquelin Luneau
(Laboratoire de Physique, ENS de Lyon, France)
Author:
Jacquelin Luneau
(Laboratoire de Physique, ENS de Lyon, France)
frequencies [1, 2]. We consider a quantum analog of such a pump: two quantum electromagnetic
modes strongly coupled to a qubit. We show that any initial state of this system decomposes into
a pair of adiabatic states. In a generic adiabatic state, the qubit is entangled with the two quantum
modes. We characterize this entanglement in terms of a quantum metric tensor of the model. The
time evolution of each adiabatic state induces a topologically quantized energy transfer either from
mode 1 to mode 2, or from 2 to 1. Hence, as a consequence of this topological pumping, the pair of
adiabatic states splits into states with distinguishable energy content of mode 1 and mode 2, thereby
realizing a new kind of cat state [3].
[1] I. Martin, G. Refael, and B. Halperin, Phys. Rev. X 7, 041008 (2017).
[2] J. Luneau, C. Dutreix, Q. Ficheux, P. Delplace, B. Douçot, B. Huard, and D. Carpentier, Phys. Rev. Research 4, 013169 (2022).
[3] J. Luneau, B. Douçot, and D. Carpentier, to be published.
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