Results 81 to 90 of about 1,174 (142)
Two-photon superradiance and subradiance
Physical Review AWe consider the problem of two-photon cooperative emission in systems of two-level atoms. Two physically distinct regimes are analyzed. First, we investigate the case of a small number of atoms. We study the evolution of two-photon super- and sub-radiant states and associated two-photon spectra.
Wenxuan Xie +2 more
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Physical Review Research, 2020 We show how an initial localized radiative excitation in a two-dimensional array of cold atoms can be converted into highly directional coherent emission of light by protecting the spreading of the excitation across the array in a subradiant collective ...
K. E. Ballantine, J. Ruostekoski
doaj +1 more source
Cooperative scattering of scalar waves by optimized configurations of point scatterers
, 2017 We investigate multiple scattering of scalar waves by an ensemble of $N$ resonant point scatterers in three dimensions. For up to $N = 21$ scatterers, we numerically optimize the positions of the individual scatterers, such as to maximize the total ...
Eckert, Felix +2 more
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Effect of superradiance on transport of diffusing photons in cold atomic gases
, 2006 We show that in atomic gases cooperative effects like superradiance and subradiance lead to a potential between two atoms that decays like $1/r$. In the case of superradiance, this potential is attractive for close enough atoms and can be interpreted as ...
A. Gero +8 more
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Tunable multi-qubit quantum phase gates with high fidelity based on graphene wrapped particle
AIP Advances, 2016 A graphene wrapped dielectric particle has been proposed theoretically to realize tunable multi-qubit quantum phase gates (QPGs) with ultrahigh fidelity.
Jun Ren +3 more
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Dicke Effect in the Tunnel Current through two Double Quantum Dots
, 2003 We calculate the stationary current through two double quantum dots which are interacting via a common phonon environment. Numerical and analytical solutions of a master equation in the stationary limit show that the current can be increased as well as ...
A. D. Armour +64 more
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Shot noise spectrum of superradiant entangled excitons
, 2004 The shot noise produced by tunneling of electrons and holes into a double dot system incorporated inside a p-i-n junction is investigated theoretically. The enhancement of the shot noise is shown to originate from the entangled electron-hole pair created
C. M. Li +4 more
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Quasiflat band enabling subradiant two-photon bound states [PDF]
Physical Review A, 2020 7 pages, 4 ...
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Physical Review X, 2017 A central goal within quantum optics is to realize efficient, controlled interactions between photons and atomic media. A fundamental limit in nearly all applications based on such systems arises from spontaneous emission, in which photons are absorbed ...
A. Asenjo-Garcia +4 more
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Novel Collective Effects in Integrated Photonics
, 2012 Superradiance, the enhanced collective emission of energy from a coherent ensemble of quantum systems, has been typically studied in atomic ensembles. In this work we study theoretically the enhanced emission of energy from coherent ensembles of harmonic
A. Peruzzo +25 more
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