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QuanEstimation Group

Hello! Welcome to the home page of QuanEstimation group. We are a theoretical group located in the Center for Theoretical Physics and School of Physics and Optoelectronic Engineering, Hainan University. We focus on the studies in the field of quantum technology and quantum information theory.

Opening positions

Master and Ph.D. students, and postdoctors are welcome! Please contact Prof. Jing Liu (liujing@hainanu.edu.cn) for more details.

Main Research Interests

QuanEstimation

Stable Downloads

QuanEstimation is a comprehensive toolbox for computation and scheme design in quantum parameter estimation. We are committed to developing this tool constantly and invoking new features.

Selected papers:

  1. QuanEstimation: An open-source toolkit for quantum parameter estimation,
    Phys. Rev. Res. 4, 043057 (2022).

Quantum Metrology and Control

  • Quantum phase estimations, including single and multiple phase estimations in optical interferometers.

  • Parameter estimations in atomic interferometers, such as Bose-Einstein condensate.

  • Controlled schemes to improve the precision of parameter estimations in various systems.

Selected papers:

  1. Optimal Scheme for Quantum Metrology,
    Adv. Quantum Technol. 5, 2100080 (2022).

  2. Quantum Fisher information matrix and multiparameter estimation,
    J. Phys. A: Math. Theor. 53, 023001 (2020).

  3. Quantum parameter estimation with optimal control,
    Phys. Rev. A 96, 012117 (2017).

  4. Control-enhanced multiparameter quantum estimation,
    Phys. Rev. A 96, 042114 (2017).

  5. Quantum Fisher Information for Density Matrices with Arbitrary Ranks,
    Commun. Theor. Phys. 61, 45 (2014).

  6. Phase-matching condition for enhancement of phase sensitivity in quantum metrology,
    Phys. Rev. A 88, 042316 (2013).

Foundations of Quantum Mechanics

  • Quantum speed limits. ​​

  • Quantum correlation, including the criteria, witness, and the dynamical behavior of entanglement and quantum discord.

  • Spin squeezing.

Selected papers:

  1. Quantum speed limit for complex dynamics,
    npj Quantum Inf. 9, 97 (2023).

  2. Operational definition of a quantum speed limit,
    Phys. Rev. Res. 2, 023299 (2020).