Related papers: Temporally-long C-band heralded single photons generated from hot atoms

Temporally-long C-band heralded single photons generated from hot atoms

URL: http://arxiv.org/abs/2507.03935v1
Date: Sat, 05 Jul 2025 07:45:20 GMT
Title: Temporally-long C-band heralded single photons generated from hot atoms
Authors: Pei-Yu Tu, Chia-Yu Hsu, Wei-Kai Huang, Tse-Yu Lin, Chih-Sung Chuu, Ite A. Yu,
Abstract summary: We develop a theoretical model for biphoton generation via the spontaneous four-wave mixing (SFWM) process.<n>We observe 1529-nm (C-band) heralded single photons with a temporal width of 28.3$pm$0.6 ns, corresponding to a linewidth of 11.0$pm$0.2 MHz.
Score: 2.178907194529568
License: http://creativecommons.org/licenses/by-nc-nd/4.0/
Abstract: C-band photons are recognized for having the lowest loss coefficient in optical fibers, making them highly favorable for optical fiber-based communication. In this study, we systematically investigated the temporal width of C-band heralded single photons and developed a theoretical model for biphoton generation via the spontaneous four-wave mixing (SFWM) process using a diamond-type transition scheme, which has not been previously reported. Our experimental data on temporal width closely aligns with the predictions of this model. Additionally, we introduced a new concept: the atomic velocity group relating to the two-photon resonance condition and the one-photon detuning in this atomic frame. These two parameters are crucial for understanding the behavior of the biphoton source. The concept indicates that the hot-atom source behaves similarly to the cold-atom source. Guided by our theoretical model, we observed 1529-nm (C-band) heralded single photons with a temporal width of 28.3$\pm$0.6 ns, corresponding to a linewidth of 11.0$\pm$0.2 MHz. For comparison, the ultimate linewidth limit is 6.1 MHz, determined by the natural linewidth of the atoms. Among all atom-based sources of 1300 to 1550 nm heralded single photons utilizing either cold or hot atoms, the temporal width achieved in this work represents the first instance of a width exceeding 10 ns, making it (or its linewidth) the longest (or narrowest) record to date. This work significantly enhances our understanding of diamond-type or cascade-type SFWM biphoton generation and marks an important milestone in achieving greater temporal width in atom-based sources of C-band heralded single photons.

Related papers

Observation of Subnatural-Linewidth Biphotons In a Two-Level Atomic Ensemble [0.0]
Biphotons and single photons with narrow bandwidths are essential to the realization of long-distance quantum communication (LDQC) and linear optical quantum computing (LOQC)<n>In this Letter, we manipulate the biphoton wave functions of the spontaneous four-wave mixing in a two-level atomic ensemble with a single-laser pump scheme.<n>Our innovative experimental approach enables the generation of biphotons with a sub-MHz bandwidth of 0.36 MHz, a record spectral brightness of $2.28times107$$rm s-1rm mW-1rm MHz-1$, and
arXiv Detail & Related papers (2025-01-21T06:00:05Z)
Bandwidth-tunable Telecom Single Photons Enabled by Low-noise Optomechanical Transduction [45.37752717923078]
Single-photon sources are of fundamental importance to emergent quantum technologies. Nano-structured optomechanical crystals provide an attractive platform for single photon generation. Optical absorption heating has thus far prevented these systems from being widely used in practical applications.
arXiv Detail & Related papers (2024-10-14T18:00:00Z)
Generation of subnatural-linewidth orbital angular momentum entangled biphotons using a single driving laser in hot atoms [11.01118215598991]
Orbital angular momentum (OAM) entangled photon pairs play a crucial role in the interaction of light and quantum states of matter. We demonstrate an approach for generating OAM entangled photon pairs with a narrow bandwidth by using a single driving beam in a $85$Rb atomic vapor cell.
arXiv Detail & Related papers (2024-05-31T01:46:55Z)
Engineering the impact of phonon dephasing on the coherence of a WSe$_{2}$ single-photon source via cavity quantum electrodynamics [36.88715167286119]
Emitter dephasing is one of the key issues in the performance of solid-state single photon sources. We show that it is possible to tune and engineer the coherence of photons emitted from a single WSe$$ monolayer dot via selectively coupling it to a spectral cavity resonance.
arXiv Detail & Related papers (2023-07-13T16:41:06Z)
Photophysics of Intrinsic Single-Photon Emitters in Silicon Nitride at Low Temperatures [97.5153823429076]
A robust process for fabricating intrinsic single-photon emitters in silicon nitride has been recently established. These emitters show promise for quantum applications due to room-temperature operation and monolithic integration with the technologically mature silicon nitride photonics platform.
arXiv Detail & Related papers (2023-01-25T19:53:56Z)
Ultrabright and narrowband intra-fiber biphoton source at ultralow pump power [51.961447341691]
Nonclassical photon sources of high brightness are key components of quantum communication technologies. We here demonstrate the generation of narrowband, nonclassical photon pairs by employing spontaneous four-wave mixing in an optically-dense ensemble of cold atoms within a hollow-core fiber.
arXiv Detail & Related papers (2022-08-10T09:04:15Z)
Quantum-limited millimeter wave to optical transduction [50.663540427505616]
Long distance transmission of quantum information is a central ingredient of distributed quantum information processors. Current approaches to transduction employ solid state links between electrical and optical domains. We demonstrate quantum-limited transduction of millimeter-wave (mmwave) photons into optical photons using cold $85$Rb atoms as the transducer.
arXiv Detail & Related papers (2022-07-20T18:04:26Z)
Temporally-ultralong biphotons with a linewidth of 50 kHz [1.0555828074181728]
This work has demonstrated a high-efficiency ultranarrow-linewidth biphoton source, and has made a substantial advancement in the quantum technology utilizing heralded single photons.
arXiv Detail & Related papers (2022-05-27T06:31:54Z)
Submegahertz spectral width photon pair source based on fused silica microspheres [0.0]
High efficiency, sub-MHz bandwidth photon pair generators will enable the field of quantum technology to transition from laboratory demonstrations to transformational applications involving information transfer from photons to atoms. We use an ultra-high quality factor (Q) fused silica microsphere resonant cavity to form a photon pair generator. We demonstrate the extraction of the spectral profile of a single peak in the single-photon frequency comb from a measurement of the signal-idler time of emission distribution.
arXiv Detail & Related papers (2021-10-25T23:56:19Z)
Auto-heterodyne characterization of narrow-band photon pairs [68.8204255655161]
We describe a technique to measure photon pair joint spectra by detecting the time-correlation beat note when non-degenerate photon pairs interfere at a beamsplitter. The technique is well suited to characterize pairs of photons, each of which can interact with a single atomic species.
arXiv Detail & Related papers (2021-01-08T18:21:30Z)
Understanding photoluminescence in semiconductor Bragg-reflection waveguides: Towards an integrated, GHz-rate telecom photon pair source [47.399953444625154]
semiconductor integrated sources of photon pairs may operate at pump wavelengths much closer to the bandgap of the materials. We show that devices operating near the long wavelength end of the S-band or the short C-band require temporal filtering shorter than 1 ns. We predict that shifting the operating wavelengths to the L-band and making small adjustments in the material composition will reduce the amount of photoluminescence to negligible values.
arXiv Detail & Related papers (2020-10-12T06:27:30Z)

This list is automatically generated from the titles and abstracts of the papers in this site.