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While the spontaneous emission from independent emitters provides spatially uncorrelated photons - a typical manifestation of quantum randomness, the interference of the coherent scattering leads to a well-defined intensity pattern - a feature descri
Externí odkaz:
http://arxiv.org/abs/2410.09465
Autor:
Viggiano, Viviana, Bachelard, Romain, Cunden, Fabio Deelan, Facchi, Paolo, Kaiser, Robin, Pascazio, Saverio, Pepe, Francesco V., Scardicchio, Antonello
In the collective photon emission from atomic clouds both the atomic transition frequency and the decay rate are modified compared to a single isolated atom, leading to the effects of superradiance and subradiance. In this Letter, we analyse the prop
Externí odkaz:
http://arxiv.org/abs/2407.11858
Autor:
Rosario, Pedro, Santos, Alan C., Piovella, Nicola, Kaiser, Robin, Cidrim, André, Bachelard, Romain
To address the outstanding task of detecting entanglement in large quantum systems, entanglement witnesses have emerged, addressing the separable nature of a state. Yet optimizing witnesses, or accessing them experimentally, often remains a challenge
Externí odkaz:
http://arxiv.org/abs/2404.15973
Autor:
Morisse, Martial, Joshi, Stuti, Mika, Jaromir, Capella, Juan, Kaiser, Robin, Bachelard, Romain, Slodicka, Lukas, Hugbart, Mathilde
Light is characterized by its electric field, yet quantum optics has revealed the importance of monitoring photon-photon correlations at all orders. We here present a comparative study of two experimental setups, composed of cold and warm Rubidium at
Externí odkaz:
http://arxiv.org/abs/2404.01711
Autor:
Parke, Harry, Thomm, Robin, Santos, Alan C., Cidrim, André, Higgins, Gerard, Mallweger, Marion, Kuk, Natalia, Salim, Shalina, Bachelard, Romain, Villas-Boas, Celso J., Hennrich, Markus
Interference underpins some of the most practical and impactful properties of both the classical and quantum worlds. In this work we experimentally investigate a new formalism to describe interference effects, based on collective states which have en
Externí odkaz:
http://arxiv.org/abs/2403.07154
The present article explores the application of randomized control techniques in empirical asset pricing and performance evaluation. It introduces geometric random walks, a class of Markov chain Monte Carlo methods, to construct flexible control grou
Externí odkaz:
http://arxiv.org/abs/2403.00009
Autor:
Magnani, P. H. N., Dias, P. G. S., Frometa, M., Martins, M. A., Piovella, N., Kaiser, R., Courteille, Ph. W., Hugbart, M., Bachelard, R., Teixeira, R. C.
Collective effects on the light scattered by disordered media such as Anderson localization and coherent backscattering critically depend on the reciprocity between interfering optical paths. In this work, we explore the breaking of reciprocity for t
Externí odkaz:
http://arxiv.org/abs/2401.05297
Publikováno v:
Nat. Phys. 20 (2024) 1441
Light and sound waves have the fascinating property that they can move objects through the transfer of linear or angular momentum. This ability has led to the development of optical and acoustic tweezers, with applications ranging from biomedical eng
Externí odkaz:
http://arxiv.org/abs/2401.00853
While Anderson is a single-particle wave effect, guaranteeing a single excitation in the system can be challenging. We here tackle this limitation in the context of light localization in three dimensions in disordered cold atom clouds, in presence of
Externí odkaz:
http://arxiv.org/abs/2311.01632
Autor:
Viggiano, Viviana, Bachelard, Romain, Cunden, Fabio Deelan, Facchi, Paolo, Kaiser, Robin, Pascazio, Saverio, Pepe, Francesco V.
Publikováno v:
Phys. Rev. A 108, 063701 (2023)
We investigate the properties of the cooperative decay modes of a cold atomic cloud, characterized by a Gaussian distribution in three dimensions, initially excited by a laser in the linear regime. We study the properties of the decay rate matrix $S$
Externí odkaz:
http://arxiv.org/abs/2306.06055