6 papers
Controllable non-Hermitian topology in a dynamically protected cat qubit
Tian-Le Yang, Pei-Rong Han, Zhen-Biao Yang +1
Dissipatively stabilized cat qubits are promising for fault-tolerant quantum information processing, yet their non-Hermitian (NH) spectral topology remains largely unexplored. We u…
Quantum metrology via mitigation of single-photon loss using an engineered nonlinear oscillator
Tian-Le Yang, Wen Ning, Zhen-Biao Yang +1
The fragility of quantum metrological advantages under loss remains a major barrier to practical quantum sensing. For a two-photon-driven (TPD) Kerr resonator (TPD-Kerr model) subj…
Sensing weak anharmonicities with a passive-active anti-PT symmetric system
Ya-Wei Zeng, Wei-Xin Chen, Tian-Le Yang +2
We propose a scheme for enhanced sensing of weak anharmonicities based on a three-mode anti-parity-time (anti-PT) symmetric cavity-magnon-waveguide system. By tuning the optical ga…
Exceptional phase transition in a single Kerr-cat qubit
Pei-Rong Han, Tian-Le Yang, Wen Ning +4
Exceptional points in non-Hermitian quantum systems give rise to novel genuine quantum phenomena. Recent explorations of exceptional-point-induced quantum phase transitions have ex…
Routing thermal noise flow and ground-state cooling in an optomechanical plaquette
Guang-Zheng Ye, Tian-Le Yang, Wan-Jun Su +2
We propose an effective method for cooling two non-degenerate mechanical resonators by routing thermal noise flow in a four-mode optomechanical plaquette. The thermal noise flow be…
Improving adiabatic quantum factorization via chopped random-basis optimization
Tianlai Yang, Mo Xiong, Ming Xue +2
Integer factorization remains a significant challenge for classical computers and is fundamental to the security of RSA encryption. Adiabatic quantum algorithms present a promising…