近日，东北大学的公卫江及其研究小组与大连理工大学的周玲等人合作并取得一项新进展。他们对耗散稳定的压缩猫量子比特及其在测温中的应用进行l 研究。相关研究成果已于2024年10月21日在国际知名学术期刊《物理评论A》上发表。

在本文中，研究人员展示了通过冷却机械振子来实现压缩猫态量子比特的稳定。通过研究机械振子引起的双光子加热过程相关的比特翻转率，研究人员揭示了振子作为探测环境温度探针的潜力。

此外，研究人员观察到压缩猫态量子比特的比特翻转寿命延长，显著提高了温度检测的灵敏度。最后，他们分析了单光子损失和退相干通道对温度测量的影响。

据悉，诸如噪声偏置压缩猫态量子比特等量子纠错码，有望在保持量子相干性和推动各种量子信息技术发展方面展现潜力。

附：英文原文

Title: Dissipatively stabilized squeezed-cat qubits and their application in thermometry

Author: Chengsong Zhao, Wenlin Li, Biao Xiong, Wei-jiang Gong, Ling Zhou

Issue&Volume: 2024/10/21

Abstract: Quantum error correction codes, such as noise-biased squeezed-cat qubits, hold promise for preserving quantum coherence and advancing various quantum information technologies. In this paper we demonstrate the stabilization of squeezed-cat qubits through the cooling of a mechanical oscillator. By investigating the bit-flip rate related to two-photon heating processes originating from the mechanical oscillator, we reveal the oscillator's potential as a probe for detecting environmental temperature. Moreover, we observe that the extended bit-flip lifetime of the squeezed-cat qubit significantly enhances temperature detection sensitivity. Finally, we analyze the impacts of single-photon loss and dephasing channels on thermometry.

DOI: 10.1103/PhysRevA.110.043517

Source: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.110.043517