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Dephasing Free Phot...
Dephasing Free Photon Entanglement with a Quantum Dot
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- Fognini, A. (author)
- Delft Univ Technol, Kavli Inst Nanosci Delft, NL-2628 CJ Delft, Netherlands. hmadi, A.
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Ahmadi, A. (author)
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Zeeshan, M. (author)
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Fokkens, J. T. (author)
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Gibson, S. J. (author)
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Sherlekar, N. (author)
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Daley, S. J. (author)
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Dalacu, D. (author)
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Poole, P. J. (author)
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- Jöns, Klaus D. (author)
- KTH,Kvant- och biofotonik
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- Zwiller, Val (author)
- KTH,Kvant- och biofotonik
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Reimer, M. E. (author)
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Delft Univ Technol, Kavli Inst Nanosci Delft, NL-2628 CJ Delft, Netherlands hmadi, A. Kvant- och biofotonik (creator_code:org_t)
- 2019-05-30
- 2019
- English.
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In: ACS Photonics. - : American Chemical Society (ACS). - 2330-4022. ; 6:7, s. 1656-1663
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Generation of photon pairs from quantum dots with near-unity entanglement fidelity has been a long-standing scientific challenge. It is generally thought that the nuclear spins limit the entanglement fidelity through spin flip dephasing processes. However, this assumption lacks experimental support. Here, we show two-photon entanglement with negligible dephasing from an indium rich single quantum dot comprising a nuclear spin of 9/2 when excited quasi-resonantly. This finding is based on a significantly close match between our entanglement measurements and our model that assumes no dephasing and takes into account the detection system's timing jitter and dark counts. We suggest that neglecting the detection system is responsible for the degradation of the measured entanglement fidelity in the past and not the nuclear spins. Therefore, the key to unity entanglement from quantum dots comprises a resonant excitation scheme and a detection system with ultralow timing jitter and dark counts.
Subject headings
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
Keyword
- entanglement
- fine-structure splitting
- quantum dot
- single photons
Publication and Content Type
- ref (subject category)
- art (subject category)
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To the university's database
- By the author/editor
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Fognini, A.
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Ahmadi, A.
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Zeeshan, M.
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Fokkens, J. T.
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Gibson, S. J.
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Sherlekar, N.
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show more...
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Daley, S. J.
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Dalacu, D.
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Poole, P. J.
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Jöns, Klaus D.
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Zwiller, Val
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Reimer, M. E.
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Atom and Molecul ...
- Articles in the publication
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ACS Photonics
- By the university
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Royal Institute of Technology