We experimentally demonstrate two-photon interference of a time-energy entangled photon pair generated via collective two-photon coherence in Doppler-broadened cascade-type ^{87}Rb atoms. The two photons originally proposed by J. D. Franson are realized as a photon pair due to collective effects, which are generated from the cascade atomic system with a relatively long lifetime of the initial state and a considerably shorter lifetime of the intermediate state. The achievement of two-photon interference with photon-pair sources generated from inhomogeneous atomic ensembles constitutes an important result for time-energy entanglement based on an atom-photon interaction.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1103/PhysRevLett.121.263601 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
InGaP χ integrated photonics platform for broadband, ultra-efficient nonlinear conversion and entangled photon generation.
Light Sci Appl
October 2024
Holonyak Micro and Nanotechnology Laboratory and Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.
Nonlinear optics plays an important role in many areas of science and technology. The advance of nonlinear optics is empowered by the discovery and utilization of materials with growing optical nonlinearity. Here we demonstrate an indium gallium phosphide (InGaP) integrated photonics platform for broadband, ultra-efficient second-order nonlinear optics.
View Article and Find Full Text PDFDirect generation of time-energy-entangled W triphotons in atomic vapor.
Sci Adv
September 2024
National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences and School of Physics, Nanjing University, Nanjing 210093, China.
Article Synopsis
- Entangled multiphoton sources are crucial for testing quantum theories and enhancing optical quantum technologies, and previous methods focused on using existing biphoton sources.
- The authors introduce a novel technique for generating high-rate, time-energy-entangled W-class triphotons using spontaneous six-wave mixing in a specialized atomic vapor cell.
- This new method provides long temporal coherence and adjustable waveforms, making it promising for applications in quantum communications and entanglement research.
On-Chip Quantum Information Processing with Distinguishable Photons.
Phys Rev Lett
April 2024
Quantum Engineering and Technology Laboratories, School of Physics and Department of Electrical and Electronic Engineering, University of Bristol, Bristol, United Kingdom.
Multiphoton interference is at the heart of photonic quantum technologies. Arrays of integrated cavities can support bright sources of single photons with high purity and small footprint, but the inevitable spectral distinguishability between photons generated from nonidentical cavities is an obstacle to scaling. In principle, this problem can be alleviated by measuring photons with high timing resolution, which erases spectral information through the time-energy uncertainty relation.
View Article and Find Full Text PDFQuantum entanglement and interference at 3 μm.
Sci Adv
March 2024
CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei, Anhui 230026, China.
Given the important advantages of the mid-infrared optical range (2.5 to 25 μm) for biomedical sensing, optical communications, and molecular spectroscopy, extending quantum information technology to this region is highly attractive. However, the development of mid-infrared quantum information technology is still in its infancy.
View Article and Find Full Text PDFPhotoelectron spectroscopy with entangled photons; enhanced spectrotemporal resolution.
Proc Natl Acad Sci U S A
May 2023
Department of Chemistry, University of California, Irvine, CA 92697.
In this theoretical study, we show how photoelectron signals generated by time-energy entangled photon pairs can monitor ultrafast excited state dynamics of molecules with high joint spectral and temporal resolutions, not limited by the Fourier uncertainty of classical light. This technique scales linearly, rather than quadratically, with the pump intensity, allowing the study of fragile biological samples with low photon fluxes. Since the spectral resolution is achieved by electron detection and the temporal resolution by a variable phase delay, this technique does not require scanning the pump frequency and the entanglement times, which significantly simplifies the experimental setup, making it feasible with current instrumentation.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!