Bulletin of the American Physical Society
APS March Meeting 2018
Monday–Friday, March 5–9, 2018; Los Angeles, California
Session K33: Superconducting Gates
8:00 AM–11:00 AM,
Wednesday, March 7, 2018
LACC Room: 408B
Sponsoring Unit: DQI
Chair: Alexandre Blais, Univ of Sherbrooke
Abstract: K33.00010 : Controlling the arrow of time in circuit QED*
10:36 AM–10:48 AM
Nicole Yunger Halpern
The unitary time evolution of a quantum system implies that flipping the overall sign of a Hamiltonian is equivalent to reversing time. Time reversal operations have utility in, for example, measuring out-of-time-ordered correlators (OTOCs), which have been considered theoretically to quantify information scrambling and identify many-body localized phases. Following a proposal by Zhu, Hafezi, and Grover [Phys. Rev. A 94, 062329 (2016)], we present the design and preliminary measurements of a planar superconducting circuit where the sign of an effective Hamiltonian of bus-coupled qubits is controlled by the state of an ancilla qubit. We discuss some of the practical challenges of this approach and the implications for OTOC measurements.
*This work was supported by AFOSR MURI (16RT0696 and FA9550-15-1-0015); the IQIM, an NSF PFC (PHY-1125565) supported by the Gordon and Betty Moore Foundation (GBMF-2644); and the Kavli Nanoscience Institute at Caltech.
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