6 papers · 1 filter
Nonreciprocal Dispersive Coupling for Quantum Sensing
Dong Xie, Chunling Xu
Dispersive coupling is widely utilized for quantum information readout. Most prior studies have concentrated on reciprocal dispersive coupling. Here, we further construct nonrecipr…
Super-Heisenberg Scaling Using Nonlinear Quantum Scrambling
Dong Xie, Chunling Xu
Super-Heisenberg scaling, which scales as with in terms of the number of particles or in terms of the evolution time , is better than Heisenberg s…
Gravimetry enhanced by nonreciprocal optomechanical coupling
Dong Xie, Chunling Xu
We explore how to measure the gravitational acceleration by using a dissipative optomechanical cavity. What is quite different from the conventional measurement methods is that we…
Dispersive Qubit Readout of Temperature
Dong Xie, Chunling Xu
Squeezed light can exponentially increase the signal-to-noise ratio (SNR) of dispersive qubit readout, especially using a combination of injected external squeezing (IES) and intra…
Nonreciprocal Quantum Sensing
Dong Xie, Chunling Xu
Nonreciprocity can not only generate quantum resources, but also shield noise and reverse interference from driving signals. We investigate the advantages of nonreciprocal coupling…
Quantum metrology in a driven-dissipation down-conversion system beyond the parametric approximation
Dong Xie, Chunling Xu
We investigate quantum metrology in a degenerate down-conversion system composed of a pump mode and two degenerate signal modes. In the conventional parametric approximation, the p…