Dynamically protected cat-qubits: a new paradigm for universal quantum computation

Mazyar Mirrahimi, Zaki Leghtas, Victor V. Albert, Steven Touzard, et al. · 2014 · New J. Phys. 16, 045014 (2014)

| 编号 QE170 | 主题 玻色子码 | 链接 arXiv:1312.2017 |

摘要

摘要保留原文（英文）

摘要取自 arXiv / 出版方元数据，未作翻译，以保证与原文一致。

Abstract. We present a new hardware-ecient paradigm for universal quantum computation which is based on encoding, protecting and manipulating quantum information in a quantum harmonic oscillator. This proposal exploits multi-photon driven dissipative processes to encode quantum information in logical bases composed of Schr•odinger cat states. More precisely, we consider two schemes. In a rst scheme, a two-photon driven dissipative process is used to stabilize a logical qubit basis of two-component Schr•odinger cat states. While such a scheme ensures a protection of the logical qubit against the photon dephasing errors, the prominent error channel of single-photon loss induces bit- ip type errors that cannot be corrected. Therefore, we consider a second scheme based on a four-photon driven dissipative process which leads to the choice of four-component Schr•odinger cat states as the logical qubit. Such a logical qubit can be protected against single-photon loss by continuous photon number parity measurements. Next, applying some speci c Hamiltonians, we provide a set of universal quantum gates on the encoded qubits of each of the two schemes. In particular, we illustrate how these operations can be rendered fault-tolerant with respect to various decoherence channels of participating quantum systems. Finally, we also propose experimental schemes based on quantum superconducting

本站词条在引用该文献时，会以 wikilink（sources/QE170）链接到本页；右侧「反向链接」面板自动列出所有引用它的词条。