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Caspar P, Verbanis E, Oudot E, Maring N, Samara F, Caloz M, Perrenoud M, Sekatski P, Martin A, Sangouard N, Zbinden H, Thew RT. Heralded Distribution of Single-Photon Path Entanglement. Phys Rev Lett 2020; 125:110506. [PMID: 32975988 DOI: 10.1103/physrevlett.125.110506] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Accepted: 07/30/2020] [Indexed: 06/11/2023]
Abstract
We report the experimental realization of heralded distribution of single-photon path entanglement at telecommunication wavelengths in a repeater-like architecture. The entanglement is established upon detection of a single photon, originating from one of two spontaneous parametric down-conversion photon pair sources, after erasing the photon's which-path information. In order to certify the entanglement, we use an entanglement witness which does not rely on postselection. We herald entanglement between two locations, separated by a total distance of 2 km of optical fiber, at a rate of 1.6 kHz. This work paves the way towards high-rate and practical quantum repeater architectures.
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Affiliation(s)
- P Caspar
- Department of Applied Physics, University of Geneva, CH-1211 Genève, Switzerland
| | - E Verbanis
- Department of Applied Physics, University of Geneva, CH-1211 Genève, Switzerland
| | - E Oudot
- Department of Applied Physics, University of Geneva, CH-1211 Genève, Switzerland
- Quantum Optics Theory Group, University of Basel, CH-4056 Basel, Switzerland
| | - N Maring
- Department of Applied Physics, University of Geneva, CH-1211 Genève, Switzerland
| | - F Samara
- Department of Applied Physics, University of Geneva, CH-1211 Genève, Switzerland
| | - M Caloz
- Department of Applied Physics, University of Geneva, CH-1211 Genève, Switzerland
| | - M Perrenoud
- Department of Applied Physics, University of Geneva, CH-1211 Genève, Switzerland
| | - P Sekatski
- Quantum Optics Theory Group, University of Basel, CH-4056 Basel, Switzerland
| | - A Martin
- Department of Applied Physics, University of Geneva, CH-1211 Genève, Switzerland
| | - N Sangouard
- Quantum Optics Theory Group, University of Basel, CH-4056 Basel, Switzerland
- Institut de physique théorique, Université Paris Saclay, CEA, CNRS, F-91191 Gif-sur-Yvette, France
| | - H Zbinden
- Department of Applied Physics, University of Geneva, CH-1211 Genève, Switzerland
| | - R T Thew
- Department of Applied Physics, University of Geneva, CH-1211 Genève, Switzerland
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Guerreiro T, Monteiro F, Martin A, Brask JB, Vértesi T, Korzh B, Caloz M, Bussières F, Verma VB, Lita AE, Mirin RP, Nam SW, Marsilli F, Shaw MD, Gisin N, Brunner N, Zbinden H, Thew RT. Demonstration of Einstein-Podolsky-Rosen Steering Using Single-Photon Path Entanglement and Displacement-Based Detection. Phys Rev Lett 2016; 117:070404. [PMID: 27563941 DOI: 10.1103/physrevlett.117.070404] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Indexed: 06/06/2023]
Abstract
We demonstrate the violation of an Einstein-Podolsky-Rosen steering inequality developed for single-photon path entanglement with displacement-based detection. We use a high-rate source of heralded single-photon path-entangled states, combined with high-efficiency superconducting-based detectors, in a scheme that is free of any postselection and thus immune to the detection loophole. This result conclusively demonstrates single-photon entanglement in a one-sided device-independent scenario, and opens the way towards implementations of device-independent quantum technologies within the paradigm of path entanglement.
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Affiliation(s)
- T Guerreiro
- Group of Applied Physics, University of Geneva, CH-1211 Geneva 4, Switzerland
| | - F Monteiro
- Group of Applied Physics, University of Geneva, CH-1211 Geneva 4, Switzerland
| | - A Martin
- Group of Applied Physics, University of Geneva, CH-1211 Geneva 4, Switzerland
| | - J B Brask
- Département de Physique Théorique, Université de Genève, CH-1211 Geneva 4, Switzerland
| | - T Vértesi
- Institute for Nuclear Research, Hungarian Academy of Sciences, H4001-Debrecen, P.O. Box 51, Hungary
| | - B Korzh
- Group of Applied Physics, University of Geneva, CH-1211 Geneva 4, Switzerland
| | - M Caloz
- Group of Applied Physics, University of Geneva, CH-1211 Geneva 4, Switzerland
| | - F Bussières
- Group of Applied Physics, University of Geneva, CH-1211 Geneva 4, Switzerland
| | - V B Verma
- National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA
| | - A E Lita
- National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA
| | - R P Mirin
- National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA
| | - S W Nam
- National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA
| | - F Marsilli
- Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, California 91109, USA
| | - M D Shaw
- Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, California 91109, USA
| | - N Gisin
- Group of Applied Physics, University of Geneva, CH-1211 Geneva 4, Switzerland
| | - N Brunner
- Département de Physique Théorique, Université de Genève, CH-1211 Geneva 4, Switzerland
| | - H Zbinden
- Group of Applied Physics, University of Geneva, CH-1211 Geneva 4, Switzerland
| | - R T Thew
- Group of Applied Physics, University of Geneva, CH-1211 Geneva 4, Switzerland
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Thwaites D, Hansen C, Kafrouni M, Caloz M, Leturgie Q, Corde S, Downes S, Barber J, Sykes J, Juneja P, Lehmann J. Pilot dose intercomparisons of 3D and 4D advanced lung radiotherapy. Phys Med 2014. [DOI: 10.1016/j.ejmp.2014.07.084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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