Time-bin Entangled Photons from a Quantum Dot

Overview

Journal Nat Commun

Specialty Biology

Date 2014 Jun 27

PMID 24968024

Citations 18

Authors

Harishankar Jayakumar

Ana Predojevic

Thomas Kauten

Tobias Huber

Glenn S Solomon

Gregor Weihs

Affiliations

Soon will be listed here.

Abstract

Long-distance quantum communication is one of the prime goals in the field of quantum information science. With information encoded in the quantum state of photons, existing telecommunication fibre networks can be effectively used as a transport medium. To achieve this goal, a source of robust entangled single-photon pairs is required. Here we report the realization of a source of time-bin entangled photon pairs utilizing the biexciton-exciton cascade in a III/V self-assembled quantum dot. We analyse the generated photon pairs by an inherently phase-stable interferometry technique, facilitating uninterrupted long integration times. We confirm the entanglement by performing quantum state tomography of the emitted photons, which yields a fidelity of 0.69(3) and a concurrence of 0.41(6) for our realization of time-energy entanglement from a single quantum emitter.

Citing Articles

Time-bin entangled Bell state generation and tomography on thin-film lithium niobate.

Finco G, Miserocchi F, Maeder A, Kellner J, Sabatti A, Chapman R npj Quantum Inf. 2025; 10(1):135.

PMID: 39744046 PMC: 11685101. DOI: 10.1038/s41534-024-00925-7.

Effects of resonant-laser excitation on the emission properties in a single quantum dot.

Gazzano O, Huber T, Loo V, Polyakov S, Flagg E, Solomon G Optica. 2024; 5(4).

PMID: 39380575 PMC: 11459610. DOI: 10.1364/optica.5.000354.

High-rate intercity quantum key distribution with a semiconductor single-photon source.

Yang J, Jiang Z, Benthin F, Hanel J, Fandrich T, Joos R Light Sci Appl. 2024; 13(1):150.

PMID: 38956020 PMC: 11219984. DOI: 10.1038/s41377-024-01488-0.

Toward optical quantum information processing with quantum dots coupled to microstructures [Invited].

Gazzano O, Solomon G J Opt Soc Am B. 2024; 33(7).

PMID: 38881569 PMC: 11177888. DOI: 10.1364/josab.33.00c160.

Time-bin entanglement at telecom wavelengths from a hybrid photonic integrated circuit.

Thiel H, Jehle L, Chapman R, Frick S, Conradi H, Kleinert M Sci Rep. 2024; 14(1):9990.

PMID: 38693329 PMC: 11063055. DOI: 10.1038/s41598-024-60758-4.

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