Collisional-model quantum trajectories for entangled-qubit environments

Shakib Daryanoosh*, Alexei Gilchrist, Ben Q. Baragiola

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)
31 Downloads (Pure)


We study the dynamics of quantum systems interacting with a stream of entangled-qubit pairs in the weak coupling limit. For a large class of two-qubit bath states, we present a detailed framework describing conditional dynamical maps for the system, known as quantum trajectories, that arise when the qubits are measured. Depending on the measurement basis, these quantum trajectories can be jump-type or diffusive-type, and can successively transfer entanglement from the bath qubits other quantum systems. They also exhibit features not present in standard quantum optical trajectories due to the fact that collisional models are not confined by the standard white-noise limit for optical-mode baths. As an example of this formalism, we consider the case of two remote two-level systems, where jump-type quantum trajectories herald the birth and death of entanglement.

Original languageEnglish
Article number022202
Pages (from-to)022202-1-022202-23
Number of pages23
JournalPhysical Review A
Issue number2
Publication statusPublished - Aug 2022

Bibliographical note

Copyright © 2022 American Physical Society. First published in Physical Review A, 106(2), 022202. The original publication is available at Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.


Dive into the research topics of 'Collisional-model quantum trajectories for entangled-qubit environments'. Together they form a unique fingerprint.

Cite this