scholarly journals Room-temperature generation of heralded single photons on silicon chip with switchable orbital angular momentum

2022 ◽  
Author(s):  
Shan Zhang ◽  
Xue Feng ◽  
Wei Zhang ◽  
Kaiyu Cui ◽  
Fang Liu ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Room Temperature ◽  
Quantum Information Processing ◽  
Single Photon ◽  
High Dimensional ◽  
Single Photons ◽  
Single Photon Source ◽  
Material Systems ◽  
Photon Source

Abstract In quantum optics, orbital angular momentum (OAM) is very promising to achieve high-dimensional quantum states due to the nature of infinite and discrete eigenvalues, which is quantized by the topological charge of l. Here, a heralded single-photon source with switchable OAM modes is proposed and demonstrated on silicon chip. At room-temperature, the heralded single photons with 11 OAM modes (l=2~6, -6~-1) have been successfully generated and switched through thermo-optical effect. We believe that such an integrated quantum source with multiple OAM modes and operating at room-temperature would provide a practical platform for high-dimensional quantum information processing. Moreover, our proposed architecture can also be extended to other material systems to further improve the performance of OAM quantum source.

scholarly journals Room-temperature on-chip orbital angular momentum single-photon sources

2022 ◽  
Vol 8 (2) ◽  
Author(s):  
Cuo Wu ◽  
Shailesh Kumar ◽  
Yinhui Kan ◽  
Danylo Komisar ◽  
Zhiming Wang ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Room Temperature ◽  
Single Photon ◽  
Single Photons ◽  
Photon Sources ◽  
On Chip

A room-temperature on-chip orbital angular momentum source that emits well-collimated single photons has been demonstrated.

scholarly journals A room-temperature single-photon source based on strongly interacting Rydberg atoms

Science ◽  
2018 ◽  
Vol 362 (6413) ◽  
pp. 446-449 ◽  
Author(s):  
Fabian Ripka ◽  
Harald Kübler ◽  
Robert Löw ◽  
Tilman Pfau
Keyword(s):  
Room Temperature ◽  
Rydberg Atoms ◽  
Quantum Information Processing ◽  
Single Photon ◽  
Thermal Fluctuations ◽  
Quantum States ◽  
Destructive Interference ◽  
Single Photon Source ◽  
Many Body Systems ◽  
Photon Source

Tailored quantum states of light can be created via a transfer of collective quantum states of matter to light modes. Such collective quantum states emerge in interacting many-body systems if thermal fluctuations are overcome by sufficient interaction strengths. Therefore, ultracold temperatures or strong confinement are typically required. We show that the exaggerated interactions between Rydberg atoms allow for collective quantum states even above room temperature. The emerging Rydberg interactions lead both to suppression of multiple Rydberg state excitations and destructive interference due to polariton dephasing. We experimentally implemented a four-wave mixing scheme to demonstrate an on-demand single-photon source. The combination of glass cell technology, identical atoms, and operation around room temperature promises scalability and integrability. This approach has the potential for various applications in quantum information processing and communication.

scholarly journals Scalable integrated single-photon source

2020 ◽  
Vol 6 (50) ◽  
pp. eabc8268 ◽  
Author(s):  
Ravitej Uppu ◽  
Freja T. Pedersen ◽  
Ying Wang ◽  
Cecilie T. Olesen ◽  
Camille Papon ◽  
...  
Keyword(s):  
Quantum Information Processing ◽  
Single Photon ◽  
Long Strings ◽  
High Fidelity ◽  
Single Photons ◽  
Single Photon Source ◽  
Quantum Operations ◽  
Main Challenge ◽  
On Chip ◽  
Photon Source

Photonic qubits are key enablers for quantum information processing deployable across a distributed quantum network. An on-demand and truly scalable source of indistinguishable single photons is the essential component enabling high-fidelity photonic quantum operations. A main challenge is to overcome noise and decoherence processes to reach the steep benchmarks on generation efficiency and photon indistinguishability required for scaling up the source. We report on the realization of a deterministic single-photon source featuring near-unity indistinguishability using a quantum dot in an “on-chip” planar nanophotonic waveguide circuit. The device produces long strings of >100 single photons without any observable decrease in the mutual indistinguishability between photons. A total generation rate of 122 million photons per second is achieved, corresponding to an on-chip source efficiency of 84%. These specifications of the single-photon source are benchmarked for boson sampling and found to enable scaling into the regime of quantum advantage.

Fluctuation Analysis of Key Distribution Protocol Based on Heralded Single-Photon Source and Orbital Angular Momentum

2020 ◽  
Vol 47 (4) ◽  
pp. 0412001
Author(s):  
何业锋 He Yefeng ◽  
郭佳瑞 Guo Jiarui ◽  
李春雨 Li Chunyu ◽  
赵艳坤 Zhao Yankun
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Single Photon ◽  
Key Distribution ◽  
Fluctuation Analysis ◽  
Single Photon Source ◽  
Photon Source

scholarly journals Optical fibre-based single photon source using InAsP quantum dot nanowires and gradient-index lens collection

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
David B. Northeast ◽  
Dan Dalacu ◽  
John F. Weber ◽  
Jason Phoenix ◽  
Jean Lapointe ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Optical Fibre ◽  
Room Temperature ◽  
Single Photon ◽  
Collection Efficiency ◽  
Single Mode ◽  
Single Photons ◽  
Gradient Index ◽  
Single Photon Source ◽  
Photon Source

AbstractWe present a compact, fibre-coupled single photon source using gradient-index (GRIN) lenses and an InAsP semiconductor quantum dot embedded within an InP photonic nanowire waveguide. A GRIN lens assembly is used to collect photons close to the tip of the nanowire, coupling the light immediately into a single mode optical fibre. The system provides a stable, high brightness source of fibre-coupled single photons. Using pulsed excitation, we demonstrate on-demand operation with a single photon purity of 98.5% when exciting at saturation in a device with a source-fibre collection efficiency of 35% and an overall single photon collection efficiency of 10%. We also demonstrate “plug and play” operation using room temperature photoluminescence from the InP nanowire for room temperature alignment.

scholarly journals Bright room temperature single photon source at telecom range in cubic silicon carbide

2018 ◽  
Vol 9 (1) ◽  
Author(s):  
Junfeng Wang ◽  
Yu Zhou ◽  
Ziyu Wang ◽  
Abdullah Rasmita ◽  
Jianqun Yang ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Room Temperature ◽  
Single Photon ◽  
Single Photon Source ◽  
Cubic Silicon Carbide ◽  
Photon Source

Correction to Ultrafast Room Temperature Single-Photon Source from Nanowire-Quantum Dots

Nano Letters ◽  
2014 ◽  
Vol 14 (3) ◽  
pp. 1693-1693
Author(s):  
S. Bounouar ◽  
M. Elouneg-Jamroz ◽  
M. den Hertog ◽  
C. Morchutt ◽  
E. Bellet-Amalric ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Room Temperature ◽  
Single Photon ◽  
Single Photon Source ◽  
Photon Source

scholarly journals High Brightness Room Temperature III-Nitride Based Single Photon Source.

2016 ◽  
Author(s):  
Ganapathi Subramanian Subramania ◽  
Patrick Duke Anderson ◽  
Daniel Koleske
Keyword(s):  
Room Temperature ◽  
Single Photon ◽  
Single Photon Source ◽  
High Brightness ◽  
Photon Source
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