Bulletin of the American Physical Society
APS March Meeting 2021
Monday–Friday, March 15–19, 2021; Virtual; Time Zone: Central Daylight Time, USA
Session P33: Quantum Control in the Presence of Noise and Decoherence
3:00 PM–6:00 PM,
Wednesday, March 17, 2021
Sponsoring Unit: DQI
Chair: Christopher Eichler, Princeton University
Abstract: P33.00007 : Using spectator qubit to Optimally mitigating qubit decoherence
4:12 PM–4:24 PM
(China Academy of Space Technology)
In this project, we consider decoherence effect caused by a random telegraph process (RTP). Two question arises; (1) How often and (2) What measurement basis we should use? Note that the second question is not necessary independent of the the first one. Also, a sequence of measurements on the spectator qubit is adaptive, meaning that the basis for later measurements depends on the results of the earlier measurements. Furthermore the quantity to be estimated is the cumulative phase acquired by the target qubit, proportional to the integral of the RTP. Despite these complications, we identify a measurement strategy for the spectator qubit to optimally mitigate the decoherence in the target qubit.
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