Zobrazeno 1 - 10
of 78
pro vyhledávání: '"Konya, G."'
Publikováno v:
Phys. Rev. A 97, 063602 (2018)
We investigate the quantum measurement noise effects on the dynamics of an atomic Bose lattice gas inside an optical resonator. We describe the dynamics by means of a hybrid model consisting of a Bose--Hubbard Hamiltonian for the atoms and a Heisenbe
Externí odkaz:
http://arxiv.org/abs/1803.06014
Publikováno v:
Scientific Reports 11:16337 (2021)
We show that the Power-Zienau-Woolley picture of the electrodynamics of nonrelativistic neutral particles (atoms) can be derived from a gauge-invariant Lagrangian without making reference to any gauge whatsoever in the process. This equivalence is in
Externí odkaz:
http://arxiv.org/abs/1801.05590
Publikováno v:
Phys. Rev. A 90, 013623 (2014)
We present a general theory for calculating the damping rate of elementary density wave excitations in a Bose-Einstein condensate strongly coupled to a single radiation field mode of an optical cavity. Thereby we give a detailed derivation of the hug
Externí odkaz:
http://arxiv.org/abs/1406.1669
Publikováno v:
Phys. Rev. A 89, 051601(R) (2014)
We show that the damping rate of elementary excitations of hybrid systems close to a phase transition can undergo a remarkable resonance like enhancement before mode softening takes place. In particular, we consider the friction of a collective densi
Externí odkaz:
http://arxiv.org/abs/1312.6719
Publikováno v:
Phys. Rev. A 86, 013641 (2012)
Laser-driven Bose-Einstein condensate of ultracold atoms loaded into a lossy high-finesse optical resonator exhibits critical behavior and, in the thermodynamic limit, a phase transition between stationary states of different symmetries. The system r
Externí odkaz:
http://arxiv.org/abs/1206.5131
Publikováno v:
Eur. Phys. J. D 65, 33--42 (2011)
We develop a mean-field model describing the Hamiltonian interaction of ultracold atoms and the optical field in a cavity. The Bose-Einstein condensate is properly defined by means of a grand-canonical approach. The model is efficient because only th
Externí odkaz:
http://arxiv.org/abs/1101.3760
Publikováno v:
Phys. Rev. Lett 104, 130401 (2010)
We show that the motion of a laser-driven Bose-Einstein condensate in a high-finesse optical cavity realizes the spin-boson Dicke-model. The quantum phase transition of the Dicke-model from the normal to the superradiant phase corresponds to the self
Externí odkaz:
http://arxiv.org/abs/0912.3260
Akademický článek
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Publikováno v:
Oil & Gas Science and Technology, Vol 66, Iss 2, Pp 209-221 (2011)
A preliminary analysis has been conducted of the performance of a Chemical Looping system with Oxygen Uncoupling (CLOU) with copper oxide as the oxygen carrier and coal approximated by carbon as the fuel. The advantages of oxygen uncoupling are demon
Externí odkaz:
https://doaj.org/article/ca5dd30551014bf8a46232ac16af25da
Akademický článek
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