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.

scholarly journals An Easy-Implemented On-Chip Waveguide Coupled Single Photon Source Based on Self-Assembled Quantum Dots Membrane

2021 ◽  
Vol 11 (2) ◽  
pp. 695
Author(s):  
Ping Jiang ◽  
Na Ma ◽  
Peng Liu ◽  
Wenxuan Wu ◽  
Kai Zhang
Keyword(s):  
Quantum Dot ◽  
Cross Correlation ◽  
Single Photon ◽  
Photon Statistics ◽  
Single Photons ◽  
Single Photon Source ◽  
Photonic Circuit ◽  
On Chip ◽  
Photon Source ◽  
Scatter Light

In recent years, many groups and institutions have been committed to the research of integrated quantum photonic circuit technologies, of which the key components are waveguide coupled single photon sources. In this study, we propose an on-chip waveguide-coupled single photon source that is easily implemented as the waveguide is directly made from the quantum dot membrane. In order to scatter light out of the on-chip waveguide plane into the detection apparatus, grating output couplers are made at both ends of the waveguide. The photon statistics of the on-chip photon source were investigated by second-order correlation function g(2)(τ) measurements using a Hanbury Brown and Twiss interferometer. From the spectra and cross-correlation experiments by collecting emission at the point of quantum dot and out coupler, the emitting of single photons from the same quantum dot and propagating via the waveguide to the out couplers was confirmed. These results show that we have achieved an on-chip single photon source that is easily implemented and easily integrated into quantum photonic circuits.

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.

On-Chip Integrated Single Photon Source-Optically Resonant Metastructure Based Scalable Quantum Optical Circuits

2020 ◽  
Vol 56 (1) ◽  
pp. 1-9 ◽  
Author(s):  
Swarnabha Chattaraj ◽  
Jiefei Zhang ◽  
Siyuan Lu ◽  
Anupam Madhukar
Keyword(s):  
Single Photon ◽  
Single Photon Source ◽  
On Chip ◽  
Quantum Optical ◽  
Optical Circuits ◽  
Photon Source

scholarly journals A Waveguide-Coupled On-Chip Single-Photon Source

2012 ◽  
Vol 2 (1) ◽  
Author(s):  
A. Laucht ◽  
S. Pütz ◽  
T. Günthner ◽  
N. Hauke ◽  
R. Saive ◽  
...  
Keyword(s):  
Single Photon ◽  
Single Photon Source ◽  
On Chip ◽  
Photon Source

Ultra-Compact High Fidelity Heralded Single Photon Source in a III-V Photonic Crystal

2012 ◽  
Author(s):  
Alex S. Clark ◽  
Chad Husko ◽  
Matthew J. Collins ◽  
Alfredo De Rossi ◽  
Sylvain Combrié ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Single Photon ◽  
High Fidelity ◽  
Single Photon Source ◽  
Photon Source

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 On-Chip Waveguide Coupling of a Layered Semiconductor Single-Photon Source

Nano Letters ◽  
2017 ◽  
Vol 17 (9) ◽  
pp. 5446-5451 ◽  
Author(s):  
Philipp Tonndorf ◽  
Osvaldo Del Pozo-Zamudio ◽  
Nico Gruhler ◽  
Johannes Kern ◽  
Robert Schmidt ◽  
...  
Keyword(s):  
Single Photon ◽  
Single Photon Source ◽  
Layered Semiconductor ◽  
Waveguide Coupling ◽  
On Chip ◽  
Photon Source
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