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Hardware-efficient autonomous quantum memory protection

Abstract : We propose to encode a quantum bit of information in a superposition of coherent states of an oscillator, with four different phases. Our encoding in a single cavity mode, together with a protection protocol, significantly reduces the error rate due to photon loss. This protection is ensured by an efficient quantum error correction scheme employing the nonlinearity provided by a single physical qubit coupled to the cavity. We describe in detail how to implement these operations in a circuit quantum electrodynamics system. This proposal directly addresses the task of building a hardware-efficient quantum memory and can lead to important shortcuts in quantum computing architectures.
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https://hal.inria.fr/hal-00924534
Contributor : Mazyar Mirrahimi <>
Submitted on : Monday, January 6, 2014 - 10:06:18 PM
Last modification on : Thursday, September 24, 2020 - 4:46:02 PM

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Zaki Leghtas, Gerhard Kirchmair, Brian Vlastakis, Robert J. Schoelkopf, Michel H. Devoret, et al.. Hardware-efficient autonomous quantum memory protection. Physical Review Letters, American Physical Society, 2013, 111, 5 p. ⟨10.1103/PhysRevLett.111.120501⟩. ⟨hal-00924534⟩

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