24 citations · 103 across the 19 of their papers we have counts for
19 papers
Industry-ready spin-photon interfaces for hybrid photonic quantum computing
Hêlio Huet, Hubert Lam, Thibaut Pollet +45
Hybrid photonic quantum computers, combining stationary matter qubits and flying photonic qubits, offer an intrinsically networked and resource-efficient route to large-scale, erro…
Energetics of non-Gaussianity in single mode cavities
Sahil Sardar Jafar, Sahil S. Jafar, Kian Hwee Lim +4
Non-Gaussian states are key resources for quantum technologies, making the quantification of non-Gaussianity a fundamental challenge. We introduce an energetic framework for charac…
Optimizing Wigner Negativity in Scattering Processes Using Energetic Cost Functions
Kian Hwee Lim, Kiarn T. Laverick, Sahil S. Jafar +3
Wigner negativity is a key resource for quantum technologies but is difficult to optimize in multimode scattering systems. We study the scattering of coherent pulses by a two-level…
An Energetic Constraint for Qubit-Qubit Entanglement
Kiarn T. Laverick, Samyak P. Prasad, Pascale Senellart +2
We analyze qubit-qubit entanglement from an energetic perspective and reveal an energetic trade-off between quantum coherence and entanglement. We decompose each qubit internal ene…
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…
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…
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…
Quantum state smoothing when Alice assumes the wrong type of monitoring by Bob
Areeya Chantasri, Kiarn T. Laverick, Howard M. Wiseman
An open quantum system leaks information into its environment. In some circumstances it is possible for an observer, say Alice, to recover that information, as a classical measurem…
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…
A Retrodictive Approach to Quantum State Smoothing
Mingxuan Liu, Valerio Scarani, Alexia Auffèves +1
Smoothing is a technique for estimating the state of an imperfectly monitored open system by combining both prior and posterior measurement information. In the quantum regime, curr…
Nonlocality activation in a photonic quantum network
Luis Villegas-Aguilar, Emanuele Polino, Farzad Ghafari +9
Bell nonlocality refers to correlations between two distant, entangled particles that challenge classical notions of local causality. Beyond its foundational significance, nonlocal…
Quantum state smoothing cannot be assumed classical even when the filtering and retrofiltering are classical
Kiarn T. Laverick, Prahlad Warszawski, Areeya Chantasri +1
State smoothing is a technique to estimate a state at a particular time, conditioned on information obtained both before (past) and after (future) that time. For a classical system…
Quantum state smoothing as an optimal estimation problem with three different cost functions
Kiarn T. Laverick, Ivonne Guevara, Howard M. Wiseman
Quantum state smoothing is a technique to estimate an unknown true state of an open quantum system based on partial measurement information both prior and posterior to the time of…
Unifying theory of quantum state estimation using past and future information
Areeya Chantasri, Ivonne Guevara, Kiarn T. Laverick +1
Quantum state estimation for continuously monitored dynamical systems involves assigning a quantum state to an individual system at some time, conditioned on the results of continu…
The Quantum Rauch-Tung-Striebel Smoothed State
Kiarn T. Laverick
Smoothing is a technique that estimates the state of a system using measurement information both prior and posterior to the estimation time. Two notable examples of this technique…
Linear Gaussian Quantum State Smoothing: Understanding the optimal unravelings for Alice to estimate Bob's state
Kiarn T. Laverick, Areeya Chantasri, Howard M. Wiseman
Quantum state smoothing is a technique to construct an estimate of the quantum state at a particular time, conditioned on a measurement record from both before and after that time.…
General criteria for quantum state smoothing with necessary and sufficient criteria for linear Gaussian quantum systems
Kiarn T. Laverick, Areeya Chantasri, Howard M. Wiseman
Quantum state smoothing is a technique for estimating the quantum state of a partially observed quantum system at time , conditioned on an entire observed measurement record (bo…
Quantum State Smoothing for Linear Gaussian Systems
Kiarn T. Laverick, Areeya Chantasri, Howard M. Wiseman
Quantum state smoothing is a technique for assigning a valid quantum state to a partially observed dynamical system, using measurement records both prior and posterior to an estima…
Adaptive estimation of a time-varying phase with coherent states: smoothing can give an unbounded improvement over filtering
Kiarn T. Laverick, Howard M. Wiseman, Hossien T. Dinani +1
The problem of measuring a time-varying phase, even when the statistics of the variation is known, is considerably harder than that of measuring a constant phase. In particular, th…