Shihao Ru

Jan 3, 2024 | link.aps.org | Quantum Optoelectronic Devices |Xi'an Jiaotong |Shihao Ru |Yunlong Wang

Optimal probe states and measurements are always required to achieve the best estimation precision in quantum metrology. In the actual physical environment, ubiquitous noise hinders estimation precision and amplifies the challenges of optimizing the probe states and measurements. In this study we extend a theoretical proposal, presented in Phys. Rev. A 103, 032615 (2021), to encompass noisy general Pauli channels for SU(2) phase estimation.

Feb 9, 2023 | link.aps.org | Shihao Ru |Quantum Optoelectronic Devices |Xiao-Min Hu |Cen-Xiao Huang

Abstract The general Hardy-like quantum pigeonhole paradoxes for n-qubit states were presented by Tang [W. Tang, Phys. Rev. A 105, 032457 (2022)]. It has been shown that each of such paradoxes can be associated with an uncolorable solution of a specific vertex-coloring problem induced from the projected-coloring graph (a kind of unconventional graph).