Non-classical light features scattered by laser pumped molecules with permanent dipoles
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MÎRZAC, Alexandra, MACOVEI, Mihai. Non-classical light features scattered by laser pumped molecules with permanent dipoles. In: Materials Science and Condensed Matter Physics, Ed. 9, 25-28 septembrie 2018, Chișinău. Chișinău, Republica Moldova: Institutul de Fizică Aplicată, 2018, Ediția 9, p. 64.
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Materials Science and Condensed Matter Physics
Ediția 9, 2018
Conferința "International Conference on Materials Science and Condensed Matter Physics"
9, Chișinău, Moldova, 25-28 septembrie 2018

Non-classical light features scattered by laser pumped molecules with permanent dipoles

CZU: 538.9

Pag. 64-64

Mîrzac Alexandra, Macovei Mihai
 
Institute of Applied Physics
 
Disponibil în IBN: 15 ianuarie 2019


Rezumat

Due to its potential appplications in high-precision measurements like graviational wave detection, quantum computing etc., squeezing of the fluorescent field has been widely studied. Both communication and precision measurements require only one of the quadratures of the field, it is thus possible to elude the quantum limitation expressed by the Heisenberg inequality by reducing the fluctuation in one of the quadratures below that of a coherent state. However, at the expense of increasing the noise in the other quadrature, preventing the Heisenberg inequality from being violated [1].  Here we explore the quantum fluctuations of the light scattered by laser driven two-level systems with permanent dipoles. As a result, we have figured out additional quantum features of the discussed light due to the interaction of the permanent dipoles with external laser sources. Particularly, we are considering a two-level system with permanent dipole moment, which is interacting with two external coherent laser fields. The first laser is near resonance with the transition frequency of the two-level sample while the second one is close to resonance with dressed-frequency splitting due to the first laser respectively [2]. Taking into account the complexity of the proposed problem, we have performed two transformation of initial Hamiltonian within Rotating Wave and Born-Markov approximations. We make the first transformation in ―single dressed‖ state basis of the excited and fundamental molecule state, due to the pumping of the first laser. The second transformation is ―double dressed‘ state basis. The corresponding Master Equation is solved in the ―double dressed‖ state basis and the steady – state spectrum of squeezing light is determined. We have found distinct quantum fluctuations features which are due to permanent dipoles.