Single-Photon Superradiance and Subradiance as Collective Emission from Symmetric and Anti-Symmetric States
Articolo
Data di Pubblicazione:
2023
Citazione:
Single-Photon Superradiance and Subradiance as Collective Emission from Symmetric and Anti-Symmetric States / N. Piovella, S. Olivares. - In: SYMMETRY. - ISSN 2073-8994. - 15:10(2023 Sep), pp. 1817.1-1817.13. [10.3390/sym15101817]
Abstract:
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 excited atom prepared with a given
phase, for instance, imprinted by an external laser. Instead, subradiance is associated with the
emission from the remaining N − 1 asymmetric states, with a collective decay rate less than the
single-atom value. Here, we discuss the properties of the orthonormal basis of symmetric and
asymmetric states and the entanglement properties of superradiant and subradiant states. On the
one hand, by separating the symmetric superradiant state from the subradiant ones, we are able to
determine the subradiant fraction induced in the system by the laser. On the other hand, we show
that, as the external laser is switched off and the atomic excitation decays, entanglement in the atomic
ensemble appears when the superradiant fraction falls below the threshold 1/N.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
collective scattering; cold atoms; superradiance; subradiance
Elenco autori:
N. Piovella, S. Olivares
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