Erratum: Indistinguishability of independent single photons [Phys. Rev. A<b>79</b>, 013824 (2009)]

Sun, Fang-Wen; Wong, Cameron

doi:10.1103/physreva.82.049904

Cited by 15 publications

(28 citation statements)

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“…1(b) -are super-imposed. The effective indistinguishability includes, in contrast to previous approaches [24] to distinguishability, the dependence on the detector setting. The case γ = 0 corresponds to the situation above in which particles are effectively distinguishable, and the information on the provenience of the particles is preserved during the detection process.…”

Section: Effective Indistinguishabilitymentioning

confidence: 99%

Entanglement of identical particles and the detection process

Tichy

Melo

Kuś

et al. 2012

Fortschritte der Physik

100

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We introduce detector-level entanglement, a unified entanglement concept for identical particles that takes into account the possible deletion of many-particle which-way information through the detection process. The concept implies a measure for the effective indistinguishability of the particles, which is controlled by the measurement setup and which quantifies the extent to which the (anti-)symmetrization of the wave-function impacts on physical observables. Initially indistinguishable particles can gain or loose entanglement on their transition to distinguishability, and their quantum statistical behavior depends on their initial entanglement. Our results show that entanglement cannot be attributed to a state of identical particles alone, but that the detection process has to be incorporated in the analysis.

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Section: Effective Indistinguishabilitymentioning

confidence: 99%

Entanglement of identical particles and the detection process

Tichy

Melo

Kuś

et al. 2012

Fortschritte der Physik

100

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“…However, if |1 ⊥ |1 , K = 0, a † a † |0 = |1 ⊗ |1 , the two-photon state is |1 1| ⊗ |1 1 |. For partially distinguishable cases with 0 < K < 1, the enhancement of K in two-photon counts describes an imperfect two-photon bunching effect [32].…”

Section: Fig 4 the Experimental Values Of Gmentioning

confidence: 99%

“…where τ 0 = 425.1 ± 11.6 fs, which is determined by the duration of the pump pulse, the band-width of the interference filter and the properties of SPDC process in the BBO crystal, such as the thickness and phase matching condition [32,35]. When τ τ 0 , the two photon states was well temporally separated, K(τ ) → 0.…”

mentioning

confidence: 99%

“…The reason of K < 1 may come from the imperfect overlapping of the spatial and frequency modes and distinguishability of the single-photon state from SPDC [32]. Such a value can be further enhanced by narrower interference filters.…”

mentioning

confidence: 99%

“…Then the single photon state and the weak coherent state is mixed with a mixing ratio of r = |α| 2 /η. The indistinguishability (K) [32] corresponds to the overlapping of the two photon states. When the photons from these two sources are totally distinguishable (K = 0), the mixed photon state is:…”

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confidence: 99%

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Indistinguishability-induced classical-to-nonclassical transition of photon statistics

Shen

Wang

et al. 2017

Phys. Rev. A

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Photon statistics is one of the key properties of photon state for the study of quantum coherence and quantum information techniques. Here, we discussed the photon indistinguishability induced bunching effect which can significantly change photon statistics. Through the measurement of the second-order degree of coherence of a mixed photon state composed by a single-photon state and a weak coherent state, the statistical transition from a classical to nonclassical behavior was experimentally demonstrated by modifying the indistinguishability of the two photon states. The study will help to understand and control the photon statistics with a new manner. It also indicates that the photon indistinguishability is a key parameter for multi-partite quantum coherence.The photon statistics is a fundamental property of quantum optical field, which has been the basic of quantum coherence [1] and recently developed optical quantum information techniques [2][3][4][5]. It also has been well applied in quantum super-resolution microscopy [6,7] to achieve nanoscale resolution. Generally, the photon statistics is mainly determined by the number of the emitters and the process of the photon-matter interaction. For example, a single photon [8][9][10][11] can be generated from a single quantum emitter, which is a key photon source for quantum communication [12][13][14] and quantum computation [3,4]. Multi-photon state from nonlinear optical process has been applied to demonstrate quantum entanglement, quantum computation and high sensitivity quantum metrology [5,[15][16][17]. In experiment, the statistics of a photon state can be modified by postselection measurement [18], interaction with atoms [19][20][21] and interference with another photon state [22][23][24][25][26]. In the interference process, besides the phase modulation, the indistinguishability of photons is also a key parameter. In principle, the indistinguishability of photons will induce photon bunching and stimulated emission [25,26]. It has been the basic of multi-photon interference [27,28] for scalable optical quantum information techniques, lasers and stimulated emission depletion microscopy [29].Experimentally, the photon statistics can be evaluated with the Hanbury-Brown-Twiss (HBT) interferometer [30] to get the second-order degree of coherence [1], g (2) (0). The values of g (2) (0) demonstrate different photon statistical behaviors. A coherent light source [1] with a Poissonian distribution of photon numbers has a g (2) (0) of 1. For a classical optical field, g (2) (0) ≥ 1. For example, a thermal state shows g (2) (0) = 2, demonstrating a photon bunching behavior. While, with a photon anti-bunching behavior, g (2) (0) < 1, it is a typical * fwsun@ustc.edu.cn quantum optical field, such as a perfect single-photon source with g (2) (0) = 0. For a nonclassical N -photon number state, g (2) (0) = (N − 1)/N < 1. However, it is much more complicated for a photon state composing of different photon number states where the photon indistinguishability induced bunchin...

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Integrated Quantum Nanophotonics with Solution‐Processed Materials

et al. 2021

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A key obstacle for all quantum information science and engineering platforms is their lack of scalability. The discovery of emergent quantum phenomena and their applications in active photonic quantum technologies have been dominated by work with single atoms, self-assembled quantum dots, or single solid-state defects. Unfortunately, scaling these systems to many quantum nodes remains a significant challenge. Solution-processed quantum materials are uniquely positioned to address this challenge, but the quantum properties of these materials have remained generally inferior to those of solid-state emitters or atoms. Additionally, systematic integration of solution-processed materials with dielectric nanophotonic structures has been rare compared to other solid-state systems. Recent progress in synthesis processes and nanophotonic engineering, however, has demonstrated promising results, including long coherence times of emitted single photons and deterministic integration of emitters with dielectric nano-cavities. In this review article, these recent experiments using solution-processed quantum materials and dielectric nanophotonic structures are discussed. The progress in non-classical light state generation, exciton-polaritonics for quantum simulation, and spin-physics in these materials is discussed and an outlook for this emerging research field is provided.

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Erratum: Indistinguishability of independent single photons [Phys. Rev. A79, 013824 (2009)]

Abstract: Erratum: Indistinguishability of independent single photons [Phys. Rev. A 79, 013824 (2009)]

Cited by 15 publications

References 0 publications

Entanglement of identical particles and the detection process

Entanglement of identical particles and the detection process

Indistinguishability-induced classical-to-nonclassical transition of photon statistics

Integrated Quantum Nanophotonics with Solution‐Processed Materials

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