Zobrazeno 1 - 10
of 117
pro vyhledávání: '"Nicola Piovella"'
Autor:
Nicola Piovella
Publikováno v:
Atoms, Vol 12, Iss 9, p 43 (2024)
We propose a new expression of the cooperative decay rate of a one-dimensional chain of N two-level atoms in the single-excitation configuration. From it, the interference nature of superradiance and subradiance arises naturally, without the need to
Externí odkaz:
https://doaj.org/article/f64e3812e7ad495fba90e7cb6badcfe2
Autor:
Nicola Piovella, Stefano Olivares
Publikováno v:
Symmetry, Vol 15, Iss 10, p 1817 (2023)
Recent works have shown that collective single-photon spontaneous emission from an ensemble of N resonant two-level atoms is a rich field of study. Superradiance describes the emission from a completely symmetric state of N atoms, with a single excit
Externí odkaz:
https://doaj.org/article/95e6f46fe80d4d468cb586bf00d487fd
Autor:
Nicola Piovella
Publikováno v:
Atoms, Vol 11, Iss 7, p 101 (2023)
We present analytic expressions for the scattering of light by an extended atomic cloud. We obtain the solution for the mean-field excitation of different atomic spherical distributions driven by a uniform laser, including the initial build up, the s
Externí odkaz:
https://doaj.org/article/8a0c6312d0024e61ba836436b9fcb14e
Autor:
Nicola Piovella
Publikováno v:
Atoms, Vol 10, Iss 2, p 38 (2022)
A ring of radius ℏk0 in the momentum distribution of a Bose–Einstein condensate is visible when the atoms scatter a single photon. Here, we describe an approximated theory of this effect, leading to an analytic expression of the isotropic momentu
Externí odkaz:
https://doaj.org/article/d379d0a9a7584701a5b66b31b105b97a
Publikováno v:
Atoms, Vol 9, Iss 3, p 40 (2021)
Collective atomic recoil lasing (CARL) is a process during which an ensemble of cold atoms, driven by a far-detuned laser beam, spontaneously organize themselves in periodic structures on the scale of the optical wavelength. The principle was envisag
Externí odkaz:
https://doaj.org/article/a6a4ef93d676456daf5fa7dd63b57dc5
Autor:
Nicola Piovella, Luca Volpe
Publikováno v:
Atoms, Vol 9, Iss 2, p 28 (2021)
High-gain free-electron lasers, conceived in the 1980s, are nowadays the only bright sources of coherent X-ray radiation available. In this article, we review the theory developed by R. Bonifacio and coworkers, who have been some of the first scienti
Externí odkaz:
https://doaj.org/article/f9804cbc4d8740258be391eb2f5269b8
Autor:
Francesco Mattiotti, William M Brown, Nicola Piovella, Stefano Olivares, Erik M Gauger, G. Luca Celardo
Publikováno v:
New Journal of Physics, Vol 23, Iss 10, p 103015 (2021)
Even though sunlight is by far the most abundant renewable energy source available to humanity, its dilute and variable nature has kept efficient ways to collect, store, and distribute this energy tantalisingly out of reach. Turning the incoherent en
Externí odkaz:
https://doaj.org/article/964a829c4ce6416f9dbcf9b50a62646a
Autor:
Angel T. Gisbert, Nicola Piovella
Publikováno v:
Atoms, Vol 8, Iss 4, p 93 (2020)
Cold atomic clouds in collective atomic recoil lasing are usually confined by an optical cavity, which forces the light-scattering to befall in the mode fixed by the resonator. Here we consider the system to be in free space, which leads into a vacuu
Externí odkaz:
https://doaj.org/article/11b23a20e8e14e698ab831e3b1d3f3c2
Publikováno v:
Atoms, Vol 9, Iss 40, p 40 (2021)
Atoms
Atoms
Collective atomic recoil lasing (CARL) is a process during which an ensemble of cold atoms, driven by a far-detuned laser beam, spontaneously organize themselves in periodic structures on the scale of the optical wavelength. The principle was envisag
Autor:
Nicola Piovella, Angel T. Gisbert
Publikováno v:
Atoms, Vol 8, Iss 93, p 93 (2020)
Atoms
Volume 8
Issue 4
Atoms
Volume 8
Issue 4
Cold atomic clouds in collective atomic recoil lasing are usually confined by an optical cavity, which forces the light-scattering to befall in the mode fixed by the resonator. Here we consider the system to be in free space, which leads into a vacuu