Superconducting Cavity Qubit with Tens of Milliseconds Single-Photon Coherence Time

Ofir Milul; Barkay Guttel; Uri Goldblatt; Sergey Hazanov; Lalit M. Joshi; Daniel Chausovsky; Nitzan Kahn; Engin Çiftyürek; Fabien Lafont; Serge Rosenblum

doi:10.1103/PRXQuantum.4.030336

Superconducting Cavity Qubit with Tens of Milliseconds Single-Photon Coherence Time

Ofir Milul, Barkay Guttel, Uri Goldblatt, Sergey Hazanov, Lalit M. Joshi, Daniel Chausovsky, Nitzan Kahn, Engin Çiftyürek, Fabien Lafont, Serge Rosenblum

Department of Condensed Matter Physics

Weizmann Institute of Science

Research output: Contribution to journal › Article › peer-review

Abstract

Storing quantum information for an extended period of time is essential for running quantum algorithms with low errors. Currently, superconducting quantum memories have coherence times of a few milliseconds, and surpassing this performance has remained an outstanding challenge. In this work, we report a single-photon qubit encoded in a novel superconducting cavity with a coherence time of 34 ms, representing an order of magnitude improvement compared to previous demonstrations. We use this long-lived quantum memory to store a Schrödinger cat state with a record size of 1024 photons, indicating the cavity's potential for bosonic quantum error correction.

Original language	English
Article number	030336
Number of pages	16
Journal	PRX quantum
Volume	4
Issue number	3
DOIs	https://doi.org/10.1103/PRXQuantum.4.030336
State	Published - Jul 2023

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
General Computer Science
Mathematical Physics
General Physics and Astronomy
Applied Mathematics
Electrical and Electronic Engineering

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10.1103/PRXQuantum.4.030336License: CC BY

sr_PRXQuantum_SuperconductingCavityQubit_PV2023Final published version, 1.77 MBLicense: CC BY

https://arxiv.org/abs/2302.06442License: CC BY-NC-ND

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abstract = "Storing quantum information for an extended period of time is essential for running quantum algorithms with low errors. Currently, superconducting quantum memories have coherence times of a few milliseconds, and surpassing this performance has remained an outstanding challenge. In this work, we report a single-photon qubit encoded in a novel superconducting cavity with a coherence time of 34 ms, representing an order of magnitude improvement compared to previous demonstrations. We use this long-lived quantum memory to store a Schr{\"o}dinger cat state with a record size of 1024 photons, indicating the cavity's potential for bosonic quantum error correction.",

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AU - Hazanov, Sergey

AU - Joshi, Lalit M.

AU - Chausovsky, Daniel

AU - Kahn, Nitzan

AU - Çiftyürek, Engin

AU - Lafont, Fabien

AU - Rosenblum, Serge

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Superconducting Cavity Qubit with Tens of Milliseconds Single-Photon Coherence Time

Abstract

All Science Journal Classification (ASJC) codes

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