arXiv subjects

Yuhan Mei

Publications and source records attributed to Yuhan Mei.

3 recordsLinked to original sources

arXiv2025

Development of a Chip-Scale Optical Gyroscope with Weak Measurement Amplification Readout

The design of an integrated optical chip is proposed containing a rotation sensing ring resonator (optical gyroscope) coupled to an inverse weak value amplified Sagnac interferometer that amplifies the signal containing the phase information. We show that, for conservative parameter choices, our setup has a minimum detectable angular rotation rate of 0.1 deg/hr and an Allan deviation of 0.08 deg/hr under expected ideal conditions. We also show that for an appropriate amount of input power, our design can improve the signal-to-noise ratio, the precision of angular rotation rate, and error in detection by more than ten times compared to a Sagnac interferometer coupled to a ring resonator.

physics.optics↗

arXiv2023

First-order coherent quantum Zeno dynamics and its appearance in tight-binding chains

The coherent quantum Zeno dynamics (QZD) is a special unitary time evolution in which a quantum population transition gets constrained in a subspace of the entire Hilbert space. We show that coherent QZD can be categorized by orders for the first time, where only the zeroth-order type has been well investigated. In this paper, we focus on the little-known first-order coherent QZD (FC-QZD). We also construct some chain-like systems described by the tight-binding model which establishes FC-QZD in the form of a surprisingly nonlocal end-to-end population transition.

quant-ph↗

arXiv2023

Multipartite Entanglement: A Journey Through Geometry

Genuine multipartite entanglement is crucial for quantum information and related technologies but quantifying it has been a long-standing challenge. Most proposed measures do not meet the ``genuine'' requirement, making them unsuitable for many applications. In this work, we propose a journey toward addressing this issue by introducing an unexpected relation between multipartite entanglement and hypervolume of geometric simplices, leading to a tetrahedron measure of quadripartite entanglement. By comparing the entanglement ranking of two highly entangled four-qubit states, we show that the tetrahedron measure relies on the degree of permutation invariance among parties within the quantum system. We demonstrate potential future applications of our measure in the context of quantum information scrambling within many-body systems.

quant-ph↗