Speaker: Tomás Levy
Affiliation: IFF-CSIC
Date: Monday, 18 September 2023 at 12:00
Location: Seminar Room, Serrano 121 (CFMAC)
The generation of non-classically correlated states of light is a crucial ingredient
for quantum technologies based on quantum optics. In order to achieve
this, we need interfaces that induce effective interactions between individual
photons. This can be realized by chirally coupling an array of two-level atoms
to a waveguide. As the atoms cannot be excited twice, photons propagating
through the waveguide will build up spatial correlations as they are individually
absorbed and emitted by the atoms. A fundamental limit to this mechanism is
the spontaneous emission of the atoms into free space. In this thesis we show,
by properly considering the vacuum emission, that wave interference phenomena
of the fields can protect certain modes from decaying into free space, when
the array is periodic and dense enough. This phenomenon is called subradiance.
Subradiance will allow for the building of special two photon correlations with
fermionic characteristics, protected against losses through the propagation. We
perform numerical and analytical methods to understand the relation between
fermionization and subradiance.