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Quantum-correlated photon sources provide a means of suppressing multiple photon emission and thus improving the security and efficiency of quasi single-photon quantum key distribution systems. We present illustrative photon-counting…

Quantum Physics · Physics 2007-05-23 PJ Edwards , W N Cheung , H van Pham , G Ganesharajah , P Lynam , L Barbopoulos

We present an all-silicon source of near-infrared linearly-polarized single photons, fabricated by nanoscale positioning of a color center in a silicon-on-insulator microcavity. The color center consists of a single W center, created at a…

Superconducting Nanowire Single-Photon Detectors (SNSPDs) are key building blocks for photonic quantum technologies due to their ability to detect single photons with ultra-high efficiency, low dark counts and fast temporal resolution.…

We present an experimental implementation of a polarization-entangled photon pair source based on beam displacers. The down-converted photons are emitted via spontaneous parametric down-conversion in a non-degenerate and type-0 process. We…

Quantum Physics · Physics 2024-10-18 Minjae Hong , Rodrigo Gomez , Valerio Flavio Gili , Jorge Fuenzalida , Markus Gräfe

We use a double quantum dot as a frequency-tunable on-chip microwave detector to investigate the radiation from electron shot-noise in a near-by quantum point contact. The device is realized by monitoring the inelastic tunneling of…

Mesoscale and Nanoscale Physics · Physics 2009-11-13 S. Gustavsson , M. Studer , R. Leturcq , T. Ihn , K. Ensslin , D. C. Driscoll , A. C. Gossard

Regular arrays of two-level emitters at distances smaller that the transition wavelength collectively scatter, absorb and emit photons. The strong inter-particle dipole coupling creates large energy shifts of the collective delocalized…

Quantum Physics · Physics 2021-07-28 Raphael Holzinger , Mariona Moreno-Cardoner , Helmut Ritsch

Thin-film lithium tantalate (TFLT) has recently emerged as a promising photonic platform for chip-scale nonlinear optics due to its weaker photorefraction, higher optical damage threshold, broader transparency window, and lower…

Optics · Physics 2025-05-07 Simin Yu , Mingyue Qi , Huizong Zhu , Bofu Zhao , Jingchun Qian , Qiushi Chen , Juanjuan Lu

An anti-bunched photon field is produced from a thin-film ppln waveguide by mixing the on-chip two-photon state with a weak but matched coherent state. This is achieved by taking out the two-photon part of the coherent state via a…

Quantum Physics · Physics 2025-08-15 Yue Li , Haochuan Li , Yuhang Lei , Xiaoting Li , Jianmin Wang , Xuan Tang , Mu Ku Chen , E. Y. B. Pun , Cheng Wang , Z. Y. Ou

Silicon, a ubiquitous material in modern computing, is an emerging platform for realizing a source of indistinguishable single-photons on demand. The integration of recently discovered single-photon emitters in silicon into photonic…

Single-walled carbon nanotubes are a promising material as quantum light sources at room temperature and as nanoscale light sources for integrated photonic circuits on silicon. Here we show that integration of dopant states in carbon…

Mesoscale and Nanoscale Physics · Physics 2018-08-24 A. Ishii , X. He , N. F. Hartmann , H. Machiya , H. Htoon , S. K. Doorn , Y. K. Kato

On-chip bright quantum sources with multiplexing ability are extremely high in demand for the integrated quantum networks with unprecedented scalability and complexity. Here, we demonstrate an ultrabright and broadband biphoton quantum…

Epitaxial quantum dots have emerged as one of the best single-photon sources, not only for applications in photonic quantum technologies but also for testing fundamental properties of quantum optics. One intriguing observation in this area…

Quantum communication between distant superconducting qubits on separate chips using itinerant microwave photons has been studied to realize distributed quantum information processing. To enhance information capacity and fault tolerance in…

We report the demonstration of a bulk, intrinsically phase-stable source of polarization- and time-energy-entangled photon pairs at 810nm and 1550nm, directly coupled into single-mode optical fibers. This highly non-degenerate wavelength…

Biphoton sources that use room-temperature or hot atoms are valuable for real-world applications in long-distance quantum communication and photonic quantum computation. The heralded single photons produced by biphoton sources using the…

Quantum Physics · Physics 2025-09-15 Wei-Kai Huang , Tse-Yu Lin , Pei-Yu Tu , Yong-Fan Chen , Ite A. Yu

This article mainly focuses on one of the important phenomena in the quantum realm called entanglement. It is clear that entanglement created due to the nonlinearity property has been arisen by some different methods. This study in contrast…

Quantum Physics · Physics 2022-01-14 Ahmad Salmanogli

The realization of a high-efficiency microwave single photon detector is a long-standing problem in the field of microwave quantum optics. Here we propose a quantum non-demolition, high-efficiency photon detector that can readily be…

Quantum Physics · Physics 2018-05-23 Baptiste Royer , Arne L. Grimsmo , Alexandre Choquette-Poitevin , Alexandre Blais

We have developed a microcavity single-photon source based on a single quantum dot within a planar cavity in which wet-oxidation of a high-aluminium content layer provides lateral confinement of both the photonic mode and the injection…

Other Condensed Matter · Physics 2009-11-13 D. J. P. Ellis , A. J. Bennett , A. J. Shields , P. Atkinson , D. A. Ritchie

Long distance quantum communication is one of the prime goals in the field of quantum information science. With information encoded in the quantum state of photons, existing telecommunication fiber networks can be effectively used as a…

Quantum information technology strongly relies on coupling of optical photons with narrowband quantum systems, such as quantum dots, color centers, and atomic systems. This coupling requires matching the optical wavelength and bandwidth to…

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