Bahari, Iskandar, Spiller, Timothy P. orcid.org/0000-0003-1083-2604, Dooley, Shane et al. (2 more authors) (2018) Collapse and revival of entanglement between qubits coupled to a spin coherent state. INTERNATIONAL JOURNAL OF QUANTUM INFORMATION. 1850017. ISSN 0219-7499
Abstract
We extend the study of the Jayne-Cummings (JC) model involving a pair of identical two-level atoms (or qubits) interacting with a single mode quantized field. We investigate the effects of replacing the radiation field mode with a composite spin, comprising N qubits, or spin-1/2 particles. This model is relevant for physical implementations in superconducting circuit QED, ion trap and molecular systems. For the case of the composite spin prepared in a spin coherent state, we demonstrate the similarities of this set-up to the qubits-field model in terms of the time evolution, attractor states and in particular the collapse and revival of the entanglement between the two qubits. We extend our analysis by taking into account an effect due to qubit imperfections. We consider a difference (or "mismatch") in the dipole interaction strengths of the two qubits, for both the field mode and composite spin cases. To address decoherence due to this mismatch, we then average over this coupling strength difference with distributions of varying width. We demonstrate in both the field mode and the composite spin scenarios that increasing the width of the "error" distribution increases suppression of the coherent dynamics of the coupled system, including the collapse and revival of the entanglement between the qubits.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Keywords: | collapse revival entanglement,Jaynes-Cummings model,spin coherent state |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Physics (York) The University of York > York Institute for Materials Research |
Depositing User: | Pure (York) |
Date Deposited: | 11 Mar 2019 09:20 |
Last Modified: | 02 Apr 2025 23:15 |
Published Version: | https://doi.org/10.1142/S021974991850017X |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1142/S021974991850017X |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:143468 |