YouTube video by Laura Veirs - Topic

Researchers in Japan have found a faster way to count individual particles of light, an advance that could help with the development of photonic quantum computing.

YouTube video by Rebel HQ

YouTube video by La Viñeta Salvaje

YouTube video by David Pakman Show

Biphotons and single photons with narrow bandwidths and long coherence times are essential to the realization of long-distance quantum communication (LDQC) and linear optical quantum computing (LOQC). 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. Our innovative experimental approach enables the generation of biphotons with a sub-MHz bandwidth of 0.36 MHz, a record spectral brightness of $2.28\times10^7$${\rm s}^{-1}{\rm mW}^{-1}{\rm MHz}^{-1}$, and a temporally symmetric wave packet at moderate optical depth. The strong non-classical cross-correlation of the biphotons also enables the observation of heralded sub-MHz-linewidth single photons with a pronounced single-photon nature. The generation of sub-MHz-linewidth biphotons and single photons with a two-level atomic ensembles not only finds applications in quantum repeaters and large cluster states for LDQC and LOQC but also opens up the opportunity to miniaturize the biphoton or single-photon sources for chip-scale quantum technologies.

Biphotons and single photons with narrow bandwidths and long coherence times are essential to the realization of long-distance quantum communication (LDQC) and linear optical quantum computing (LOQC). 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. Our innovative experimental approach enables the generation of biphotons with a sub-MHz bandwidth of 0.36 MHz, a record spectral brightness of $2.28\times10^7$${\rm s}^{-1}{\rm mW}^{-1}{\rm MHz}^{-1}$, and a temporally symmetric wave packet at moderate optical depth. The strong non-classical cross-correlation of the biphotons also enables the observation of heralded sub-MHz-linewidth single photons with a pronounced single-photon nature. The generation of sub-MHz-linewidth biphotons and single photons with a two-level atomic ensembles not only finds applications in quantum repeaters and large cluster states for LDQC and LOQC but also opens up the opportunity to miniaturize the biphoton or single-photon sources for chip-scale quantum technologies.

YouTube video by DyChi's Stories

YouTube video by David Pakman Show

YouTube video by MIKA - Topic

EuroQCS-France is set to provide remote access to a 6-qubit digital photonic quantum computer from startup Quandela, ahead of the deployment of the Lucy digital photonic quantum supercomputer in France next year. This move aims to familiarize European researchers with linear optics-based quantum computing (LOQC) before the arrival of Lucy, a 12-qubit universal digital photonic quantum supercomputer acquired by the EuroHPC Joint Undertaking. Lucy will be installed at the CEA computing center south of Paris and will be part of a unique constellation of six EuroHPC quantum computers, each based on different hardware technologies. Quandela provides expert support to promote research in LOQC, with CEO Niccolo Somaschi expressing enthusiasm for introducing the Lucy system to the EuroHPC quantum computing galaxy. GENCI's Philippe Lavocat and CEA's Jacques-Charles Lafoucriere emphasized the need for users to have the right tools and level of support to tackle LOQC's learning curve.