Unifying theory of quantum state estimation using past and future information

A Chantasri, I Guevara, KT Laverick, HM Wiseman - Physics Reports, 2021 - Elsevier
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 …

Fluctuation theorems with retrodiction rather than reverse processes

CC Aw, F Buscemi, V Scarani - AVS Quantum Science, 2021 - pubs.aip.org
Irreversibility is usually captured by a comparison between the process that happens and a
corresponding “reverse process.” In the last decades, this comparison has been extensively …

Noisy atomic magnetometry in real time

J Amorós-Binefa, J Kołodyński - New Journal of Physics, 2021 - iopscience.iop.org
Continuously monitored atomic spin-ensembles allow, in principle, for real-time sensing of
external magnetic fields beyond classical limits. Within the linear-Gaussian regime, thanks to …

Squeezed light from an oscillator measured at the rate of oscillation

C Bærentsen, SA Fedorov, C Østfeldt… - Nature …, 2024 - nature.com
Sufficiently fast continuous measurements of the position of an oscillator approach
measurements projective on position eigenstates. We evidence the transition into the …

Time-symmetric correlations for open quantum systems

AJ Parzygnat, J Fullwood - arxiv preprint arxiv:2407.11123, 2024 - arxiv.org
Two-time expectation values of sequential measurements of dichotomic observables are
known to be time symmetric for closed quantum systems. Namely, if a system evolves …

Quantum retrodiction: Foundations and controversies

SM Barnett, J Jeffers, DT Pegg - Symmetry, 2021 - mdpi.com
Prediction is the making of statements, usually probabilistic, about future events based on
current information. Retrodiction is the making of statements about past events based on …

Stochastic mean-field theory for conditional spin squeezing by homodyne probing of atom-cavity photon dressed states

ZQ Zhang, Y Zhang, HZ Guo, L Wang, G Chen… - arxiv preprint arxiv …, 2023 - arxiv.org
A projective measurement on a quantum system prepares an eigenstate of the observable
measured. Measurements of collective observables can thus be employed to herald the …

Prediction-retrodiction measurements for teleportation and conditional state transfer

SA Fedorov, E Zeuthen - Physical Review Letters, 2023 - APS
Regular measurements allow predicting the future and retrodicting the past of quantum
systems. Time-nonlocal measurements can leave the future and the past uncertain, yet …

Guessing the outcome of separate and joint quantum measurements of noncommuting observables

M Khanahmadi, K Mølmer - Physical Review A, 2021 - APS
According to Heisenberg's uncertainty relation, there is an ultimate limit to how precisely we
may predict the outcome of position and momentum measurements on a quantum system …

Decoherence effects in quantum nondemolition measurement induced entanglement between Bose–Einstein condensates

S Gao, EO Ilo-Okeke, Y Mao… - Journal of Physics B …, 2022 - iopscience.iop.org
We study the robustness of quantum nondemolition (QND) measurement induced
entanglement between Bose–Einstein condensates (BECs). We consider an experimental …