7 papers
Multi-level Random-Telegraph Noise Mitigation using a Single Spectator Qubit
Yanan Liu, Hongting Song, Areeya Chantasri +1
Preserving quantum coherence in the presence of environmental noise is one of the principal challenges for quantum technologies. Noise mitigation using spectator qubits (SQs) has r…
Counterfactual quantum measurements
Ingita Banerjee, Kiarn T. Laverick, Howard M. Wiseman
Counterfactual reasoning plays a crucial role in exploring hypothetical scenarios, by comparing some consequent under conditions identical except as results from a differing antece…
Quantum trajectories for time-binned data and their closeness to fully conditioned quantum trajectories
Nattaphong Wonglakhon, Areeya Chantasri, Howard M. Wiseman
Quantum trajectories are dynamical equations for quantum states conditioned on the results of a time-continuous measurement, such as a continuous-in-time current . Recent…
Post-processed estimation of quantum state trajectories
Soroush Khademi, Jesse J. Slim, Kiarn T. Laverick +5
Weak quantum measurements enable real-time tracking and control of dynamical quantum systems, producing quantum trajectories -- evolutions of the quantum state of the system condit…
Tracking Quantum Dynamics in an Optical Cavity for Recovering Purity and Squeezing via Quantum State Smoothing
Shota Yokoyama, Kiarn T. Laverick, David McManus +6
Tracking the dynamics of a quantum system is conventionally achieved by monitoring the system continuously in time and filtering the information contained in measurement records vi…
Inequivalent ways to apply semi-classical smoothing to a quantum system
Kiarn T. Laverick, Areeya Chantasri, Howard M. Wiseman
In this paper, we correct a mistake we made in [Phys. Rev. Lett. , 190402 (2019)] and [Phys. Rev. A , 012213 (2021)] regarding the Wigner function of th…