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Our group research interests focus on quantum information theory, quantum measurements, quantum sensing, open quantum dynamics, quantum chaos and many-body quantum physics. See below for details.
Our group research interests focus on quantum information theory, quantum measurements, quantum sensing, open quantum dynamics, quantum chaos and many-body quantum physics. See below for details.
Quantum Sensing and Control
The field of quantum sensing employ quantum coherence and entanglement to improve the precision of measurements beyond the reach of classical sensors. A single quantum sensor is typically limited by finite coherence time and environmental noise, which poses challenges to its sensitivity and stability in practical applications. Decoherence effects can destroy the coherence and entanglement structure of quantum states, thereby limiting the achievable measurement precision. Therefore, to further enhance sensitivity and robustness, one way is to apply quantum control techniques to a single quantum sensor. An alternative and more scalable strategy is to introduce multiple quantum sensors and form a quantum many-body sensor array. The quantum correlations among multiple sensors can be exploited to enhance signal responses and, under certain conditions, achieve precision improvements beyond those attainable with independent collections of sensors.
[Selected Papers: PRL 132, 100803 (2024), PRL 128, 160505(2022), PRA 96, 020301 (2017)]
Quantum Information Geometry
Quantum states live in the projective Hilbert space, which can be also characterized by a smooth manifold. How do we characterize the geometry in the manifold of quantum states and understand the role of quantum measurements? This question, despite related with the research of quantum sensing, is of fundamental important in quantum information.
[Selected Papers: arXiv:2504.06812, PRL 132, 250802 (2024), PRR 6, 043084 (2024)]
Open Quantum Systems and Continuous Quantum Measurements
The subject of quantum open systems concerns a quantum primary system that is coupled to a thermal bath containing a large number degree of freedom, which physically can be represented by the electrogmagetic or phonon modes.
In the Markovian regime where the system is weakly coupled to the thermal bath, the effect of the thermal bath can be unravelled as continuous quantum measurements, which is relevant in various quantum optical experiments, such as atom fluoresce. Non-markovian regime with strong system-bath coupling is now also available with the advent of quantum technologies in superconducting circuits.
[Selected Papers: arXiv:2512.05884, Annals of Phys. 421, 168289(2020), PRB 100, 045418 (2019)]
Many-body Quantum Dynamics, Chaos and Integrability
The nonequilibrium dynamics of isolated quantum many-body systems give rise to rich and intriguing physics, encompassing phenomena such as quantum chaos, many-body localization, and thermalization. Understanding these phenomena becomes particularly challenging in the presence of strong interactions, where perturbative approaches fail. Yet, analytical solutions can be found and new universality class can still arise.
[Selected Publications: PRA 111 , 053315(2025); PRL 131, 230401(2023); PRA 107 , L051302(2023)]
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