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Two-photon interference from two blinking quantum emitters
KTH, School of Engineering Sciences (SCI), Applied Physics. AlbaNova University Center.
KTH, School of Engineering Sciences (SCI), Applied Physics. AlbaNova University Center.ORCID iD: 0000-0002-3968-5954
KTH, School of Engineering Sciences (SCI), Applied Physics. AlbaNova University Center.ORCID iD: 0000-0003-2136-4914
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2017 (English)In: Physical Review B, ISSN 2469-9950, E-ISSN 2469-9969, Vol. 96, no 7, article id 075430Article in journal (Refereed) Published
Abstract [en]

We investigate the effect of blinking on the two-photon interference measurement from two independent quantum emitters. We find that blinking significantly alters the statistics in the Hong-Ou-Mandel second-order intensity correlation function g((2))(tau) and the outcome of two-photon interference measurements performed with independent quantum emitters. We theoretically demonstrate that the presence of blinking can be experimentally recognized by a deviation from the g(D)((2))(0) = 0.5 value when distinguishable photons from two emitters impinge on a beam splitter. Our findings explain the significant differences between linear losses and blinking for correlation measurements between independent sources and are experimentally verified using a parametric down-conversion photon-pair source. We show that blinking imposes a mandatory cross-check measurement to correctly estimate the degree of indistinguishability of photons emitted by independent quantum emitters.

Place, publisher, year, edition, pages
AMER PHYSICAL SOC , 2017. Vol. 96, no 7, article id 075430
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-214329DOI: 10.1103/PhysRevB.96.075430ISI: 000407993900008Scopus ID: 2-s2.0-85028991471OAI: oai:DiVA.org:kth-214329DiVA, id: diva2:1141213
Note

QC 20170914

Available from: 2017-09-14 Created: 2017-09-14 Last updated: 2018-09-19Bibliographically approved
In thesis
1. Generation and detection of non-classical photon states
Open this publication in new window or tab >>Generation and detection of non-classical photon states
2018 (English)Licentiate thesis, comprehensive summary (Other academic)
Alternative title[sv]
Generation och detektion av icke-klassiska fotontillstånd
Abstract [en]

This thesis intends to familiarize the reader with the concepts of photon statistics and correlations in quantum optics. Developing light sources that emit quantum states is central for the realization of quantum technologies. One important step in characterizing these sources is the measurement of field fluctuations and correlations, by coincidence measurements. The expectation value of a coincidence measurement, a simultaneous measurement of two intensities (or, more general, four fields), is represented by the fourth-order correlation function. The value of the correlation function, at zero delay between the detection of two photons, reveals important properties of the state to which they belonged, for example the fluctuations of the photon number. Since predictability is important for many applications, light sources emitting single photons are also characterized by the indistinguishability of consecutively emitted photons, or of two photons from separate emitters. In paper I we investigate blinking behaviour in quantum emitters, and its effect on the interference pattern and photon statistics with photons from two separate emitters. Blinking refers to an emitters transition into a non-emitting state, and subsequent transition back to an emitting state. We show that blinking can not be treated as linear loss, when measuring the fourth-order correlation function for two emitters in a Hong-Ou-Mandel setup. In general, a measurement of the fourth-order correlation function is robust to loss, which makes it a very practical tool. However, the relation between recorded coincidence counts and the correlation function is only direct in the limit of zero detection efficiency, and depends on the detection system. In paper II, we show that by adding a variable attenuation in the beam path, we can trace back to the ''true'' value of the correlation function at zero quantum efficiency. This method improves accuracy in correlation measurements by decreasing a systematic error at the expense of an increased statistical error, which is easier to handle, extending the use of coincidence methods to classical and non-classical multi-photon states.

Place, publisher, year, edition, pages
KTH Royal Institute of Technology, 2018. p. 48
Series
TRITA-SCI-FOU ; 2018:23
Keywords
quantum optics, optical coherence, photon statistics
National Category
Atom and Molecular Physics and Optics
Research subject
Physics
Identifiers
urn:nbn:se:kth:diva-228058 (URN)978-91-7729-815-1 (ISBN)
Presentation
2018-06-15, FB53, AlbaNova university center, Roslagstullsbacken 21, Stockholm, 13:00 (English)
Opponent
Supervisors
Note

QC 20180517

Available from: 2018-05-17 Created: 2018-05-17 Last updated: 2018-05-17Bibliographically approved

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Jöns, Klaus D.Stensson, KatarinaSwillo, MarcinZwiller, ValBjörk, Gunnar

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