Polarized indistinguishable single photons from a quantum dot in an elliptical micropillar

He, Yuming; Wang, Hui; Gerhardt, S. P.; Winkler, K.; Jurkat, Jonathan; Yu, Ying; Chen, Ming-Cheng; Ding, Xing; Chen, Si; Jin, Qian; Duan, Z.-C.; Li, Jinpeng; Wang, Linjun; Huo, Yongheng; Yu, Siyuan; Höfling, Sven; Lu, Chao‐Yang; Pan, Jian-Wei

doi:10.48550/arxiv.1809.10992

Cited by 4 publications

(5 citation statements)

References 26 publications

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“…In addition, it allows the production of high-purity and highly indistinguishable single photons. Our work provides additional degree of freedom to separate the excitation laser and the single photon, and can be combined with other techniques such as side excitation 16,35 and polarized microcavities 36 to generate truly optimal single-photon sources.…”

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confidence: 99%

Coherently driving a single quantum two-level system with dichromatic laser pulses

Wang

et al. 2019

Nat. Phys.

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Efficient excitation of a single two-level system usually requires that the driving field is at the same frequency as the atomic transition. However, the scattered laser light in solid-state implementations can dominate over the single photons, imposing an outstanding challenge to perfect single-photon sources. Here, we propose a background-free method using a phase-locked dichromatic electromagnetic field with no spectral overlap with the optical transition for a coherent control of a twolevel system, and we demonstrate this method experimentally with a single quantum dot embedded in a micropillar. Single photons generated by π excitation show a purity of 0.988(1) and indistinguishability of 0.962(6). Further, the phasecoherent nature of the two-color excitation is captured by the resonancefluorescence intensity dependence on the relative phase between the two pulses.

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confidence: 99%

Coherently driving a single quantum two-level system with dichromatic laser pulses

Wang

et al. 2019

Nat. Phys.

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“…Recovery of this loss should be possible with a rejection of the pump that is based on orthogonal excitation and emission directions [18,125]. Alternatively, asymmetric microcavities systems can be employed to preferentially generate photons in a single polarization state [126].…”

Section: Single Photon Emissionmentioning

confidence: 99%

“…Resonant excitation in other broadband QD-based devices [19,137] has demonstrated non-post-selected visibilities exceeding 90%. Ideally, the excitation scheme would employ rejection techniques that do not sacrifice device efficiency [18,125,126]. Resonant excitation of nanowires [62,138,139] has yet to be applied to two-photon interference measurements.…”

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confidence: 99%

Nanowire-based sources of non-classical light

2019

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Sources of quantum light that utilize photonic nanowire designs have emerged as potential candidates for high efficiency non-classical light generation in quantum information processing. In this review we cover the different platforms used to produce nanowire-based sources, highlighting the importance of waveguide design and material properties in achieving optimal performance. The limitations of the sources are identified and routes to optimization are proposed. State-of-the-art nanowire sources are compared to other solid-state quantum emitter platforms with regard to the key metrics of single photon purity, indistinguishability and entangled-pair fidelity to maximally entangled Bell states. We also discuss the unique ability of the nanowire platform to incorporate multiple emitters in the same optical mode and consider potential applications. Finally, routes to on-chip integration are discussed and the challenges facing the development of a nanowire-based scalable architecture are presented.

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“…For choosing η and x, we give two example cases. The first (figure 2, red), where η=0.755 and x=0.975, is an example of a hypothetical best experiment we could build with current technology, with the most lossless sources (82%) [46], interferometers (99%) [42] and detectors (93%) [47], and the highest level of photon indistinguishability (97.6%) [48]. The second case (figure 2, green), where η=x=0.5, is an example of how the two algorithms perform in what would be considered a poor experiment for both distinguishability and loss.…”

Section: Comparison Of Runtimesmentioning

confidence: 99%

Classically simulating near-term partially-distinguishable and lossy boson sampling

Moylett

García−Patrón

Renema

et al. 2019

Quantum Sci. Technol.

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Boson Sampling is the problem of sampling from the same distribution as indistinguishable single photons at the output of a linear optical interferometer. It is an example of a non-universal quantum computation which is believed to be feasible in the near term and cannot be simulated on a classical machine. Like all purported demonstrations of "quantum supremacy", this motivates optimizing classical simulation schemes for a realistic model of the problem, in this case Boson Sampling when the implementations experience lost or distinguishable photons. Although current simulation schemes for sufficiently imperfect boson sampling are classically efficient, in principle the polynomial runtime can be infeasibly large. In this work, we develop a scheme for classical simulation of Boson Sampling under uniform distinguishability and loss, based on the idea of sampling from distributions where at most k photons are indistinguishable. We show that asymptotically this scheme can provide a polynomial improvement in the runtime compared to classically simulating idealised Boson Sampling. More significantly, we show that in the regime considered experimentally relevant, our approach gives an substantial improvement in runtime over other classical simulation approaches.

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Polarized indistinguishable single photons from a quantum dot in an elliptical micropillar

Cited by 4 publications

References 26 publications

Coherently driving a single quantum two-level system with dichromatic laser pulses

Coherently driving a single quantum two-level system with dichromatic laser pulses

Nanowire-based sources of non-classical light

Classically simulating near-term partially-distinguishable and lossy boson sampling

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