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 W73: Superconducting Qubits: cQED and Bosonic codes
3:00 PM–5:48 PM,
Thursday, March 9, 2023
Room: Room 405
Sponsoring
Unit:
DQI
Chair: Kevin O'Brien, Massachusetts Institute of Technology MI
Abstract: W73.00012 : A long-lived quantum memory using a 3D niobium cavity*
5:12 PM–5:24 PM
Presenter:
Ofir Milul
(Weizmann Institute of Science)
Authors:
Ofir Milul
(Weizmann Institute of Science)
Barkay Guttel
(weizmann institute of science)
Lalit Joshi
(weizmann institute of science)
Daniel Chausovsky
(weizmann institute of science)
Engin Ciftyurek
(weizmann institute of science)
Fabien Lafont
(weizmann institute of science)
Serge Rosenblum
(Weizmann Institute of Science)
and may significantly reduce the error correction overhead. 3D superconducting
cavities, which can reach quality factors well beyond 1 billion, are a promising
candidate for such quantum memories. However, these high quality factors have
not yet been leveraged to create long-lived quantum memories. This is often
due to a combination of losses induced by two-level systems and decoherence
induced by coupling to a nonlinear ancilla qubit.
In this talk, we present results for a quantum memory realized with a novel
niobium cavity controlled by a weakly-coupled transmon ancilla. We discuss the
use of error-mitigation methods to reduce the effect of cavity dephasing errors.
We show that a single-photon qubit encoded in the cavity achieves lifetimes well
beyond the current state of the art.
* This research was supported by the European Research Council (#134847).
*European Research Council (#134847)
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