aqora

Excitations in Simple Atomic Ensembles

Springer eBooksOct 23, 20070 citations

Effect of Interatomic Separation and Spatial Spread of Individual Atoms in a Collective State Interferometer

Resham Sarkar, May E. Kim, Yanfei Tu +1 more

We establish the precise role of interatomic distance and the irrelevance of free propagation broadening of atomic wavepacket in determining the fidelity of collective excitation in an ensemble based atom interferometer with high Compton frequency.

Jan 1, 20130 citations

Superradiance and related phenomena

L. I. Men’shikov

The current theory of superradiance is described. The effect is due to interatomic correlations (phase-locking) which arise under the action of a general electromagnetic field and are determined by the competition between the electron motion anharmonicity and the interatomic dipole–dipole interaction. The latter affects significantly the nature of the superradiance effect. A common nature for the radiations from a Dicke atomic ensemble and from collective waves in a substance (for example, cyclotron waves in a magnetized plasma) is established. Superradiance manifests itself in hot magnetically confined plasmas and accounts, among other things, for anomalous heat conductivity in tokamaks.The current theory of superradiance is described. The effect is due to interatomic correlations (phase-locking) which arise under the action of a general electromagnetic field and are determined by the competition between the electron motion anharmonicity and the interatomic dipole–dipole interaction. The latter affects significantly the nature of the superradiance effect. A common nature for the radiations from a Dicke atomic ensemble and from collective waves in a substance (for example, cyclotron waves in a magnetized plasma) is established. Superradiance manifests itself in hot magnetically confined plasmas and accounts, among other things, for anomalous heat conductivity in tokamaks.

Physics-UspekhiFeb 28, 199954 citations

Collective excitations in atoms

F. J. Kok

Jan 1, 19720 citations

Studies in Collective Excitations in Many-Particle systems.

R. Sridhar

Jan 1, 19710 citations

Delay-induced spontaneous dark-state generation from two distant excited atoms

William Alvarez-Giron, Pablo Solano, Kanu Sinha +1 more

We investigate the collective non-Markovian dynamics of two fully excited two-level atoms coupled to a one-dimensional waveguide in the presence of delay. We demonstrate that analogous to the well-known superfluorescence phenomena, where an inverted atomic ensemble synchronizes to enhance its emission, there is a “subfluorescence” effect that synchronizes the atoms into an entangled dark state depending on the interatomic separation. The phenomenon can lead to a two-photon bound state in the continuum. Our results are pertinent to long-distance quantum networks, presenting a mechanism for spontaneous entanglement generation between distant quantum emitters. Published by the American Physical Society 2024We investigate the collective non-Markovian dynamics of two fully excited two-level atoms coupled to a one-dimensional waveguide in the presence of delay. We demonstrate that analogous to the well-known superfluorescence phenomena, where an inverted atomic ensemble synchronizes to enhance its emission, there is a “subfluorescence” effect that synchronizes the atoms into an entangled dark state depending on the interatomic separation. The phenomenon can lead to a two-photon bound state in the continuum. Our results are pertinent to long-distance quantum networks, presenting a mechanism for spontaneous entanglement generation between distant quantum emitters. Published by the American Physical Society 2024

arXiv:2303.06559Physical Review ResearchMay 28, 20248 citations

Effect of Interatomic Separation in Ensembles in Determining the Fidelity of Collective Excitation

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