Stockill, R., Stanley, M.J., Huthmacher, L. et al. (6 more authors) (2017) Phase-Tuned Entangled State Generation between Distant Spin Qubits. Physical Review Letters (PRL), 119 (1). 010503. ISSN 0031-9007
Abstract
Quantum entanglement between distant qubits is an important feature of quantum networks. Distribution of entanglement over long distances can be enabled through coherently interfacing qubit pairs via photonic channels. Here, we report the realization of optically generated quantum entanglement between electron spin qubits confined in two distant semiconductor quantum dots. The protocol relies on spin-photon entanglement in the trionic Λ system and quantum erasure of the Raman-photon path information. The measurement of a single Raman photon is used to project the spin qubits into a joint quantum state with an interferometrically stabilized and tunable relative phase. We report an average Bell-state fidelity for | ψ ( + ) ⟩ and | ψ ( − ) ⟩ states of 61.6 ± 2.3 % and a record-high entanglement generation rate of 7.3 kHz between distant qubits.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2017 American Physical Society. Reproduced in accordance with the publisher's self-archiving policy. |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Electronic and Electrical Engineering (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 26 Jul 2017 12:23 |
Last Modified: | 26 Jul 2017 12:30 |
Published Version: | https://doi.org/10.1103/PhysRevLett.119.010503 |
Status: | Published |
Publisher: | American Physical Society |
Refereed: | Yes |
Identification Number: | 10.1103/PhysRevLett.119.010503 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:119392 |