Enhancing ultraslow transitions in cooperatively interacting multi-atom samples
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539.1 (90)
Nuclear physics. Atomic physics. Molecular physics (87)
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MACOVEI, Mihai. Enhancing ultraslow transitions in cooperatively interacting multi-atom samples. 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. 42.
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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

Enhancing ultraslow transitions in cooperatively interacting multi-atom samples

CZU: 539.1

Pag. 42-42

Macovei Mihai
 
Institute of Applied Physics
 
 
Disponibil în IBN: 14 ianuarie 2019


Rezumat

The correlations among closely packed quantum emitters, forming a multi-qubit ensemble, lead to significant changes in the quantum dynamics. The super-radiance, for instance, emphasizes the fast decay of an initially excited cooperative system as well as an enhanced radiation intensity [1]. In this context, an enormous number of experimental and theoretical works were performed with respect to this issue and super-radiance features were found in a wide range of different systems and for various applications [1, 2]. Notice that the collective quantum dynamics can be manipulated by applying external coherent laser sources [2-4].  Here, we report our recent investigations on laser-induced manipulation, often based on quantum interference phenomena, in super-radiance processes evolving in an ensemble of initially excited two- or three-level emitters [3, 4]. Due to constructive quantum interference effects induced by external coherent sources of light, the super-radiance phenomenon occurs in a much weaker atomic transition, which is not the case in the absence of the coherent driving. This result may be of visible relevance for enhancing ultra-weak transitions in atomic or atomiclike systems, or for high-frequency lasing effects. Additionally, when the excited emitters are embedded on a quantum nano-mechanical resonator then its oscillation amplitude can be significantly enhanced increasing the sensitivity of such a devise. Finally, sub-radiant two-qubit entangled states can be created as well due to a phonon engineered bath.