Zobrazeno 1 - 10
of 202
pro vyhledávání: '"Macovei M"'
Publikováno v:
Phys. Rev. A 102, 013718 (2020)
The spontaneous emission of an excited two-level emitter driven by a strong classical coherent low-frequency electromagnetic field is investigated. We find that for relatively strong laser driving, multi-photon processes are induced, thereby opening
Externí odkaz:
http://arxiv.org/abs/2007.03406
Publikováno v:
Phys. Rev. B 91, 035130 (2015)
CeRuPO is a rare example of a ferromagnetic (FM) Kondo-lattice system. External pressure suppresses the ordering temperature to zero at about $p_c\approx3$ GPa. Our ac-susceptibility and electrical-resistivity investigations evidence that the type of
Externí odkaz:
http://arxiv.org/abs/1504.00612
The creation and direct detection of n-particle atomic correlations in ensembles of atoms is investigated. For this, we study an ensemble of laser-driven atoms in which either a dipole-dipole or a Rydberg-Rydberg interaction leads to the formation of
Externí odkaz:
http://arxiv.org/abs/1202.0699
Publikováno v:
Phys. Rev. B 84, 184510 (2011)
The dynamics of two superconducting flux qubits coupled to each other and to a common bath is discussed. We focus on the case in which the qubit-qubit coupling strength dominates over the respective qubit transition frequencies. We derive the master
Externí odkaz:
http://arxiv.org/abs/1107.1587
Publikováno v:
Phys. Status Solidi B 247, 727 (2010).
We carried out electrical resistivity experiments on (Yb,La)Rh2Si2 and on Yb(Rh,Ir)2Si2 under pressure and in magnetic fields. YbRh2Si2 exhibits a weak antiferromagnetic transition at atmospheric pressure with a N\'eel temperature of only T_N = 70 mK
Externí odkaz:
http://arxiv.org/abs/1003.2143
Publikováno v:
Jr. of Modern Optics 14&15, 1287-1292 (2010)
The pairwise entanglement of an arbitrary atomic pair randomly extracted from a laser-driven dense multiqubit sample in the presence of quantum dissipation due to spontaneous emission is considered. The dipole-dipole interaction between the particles
Externí odkaz:
http://arxiv.org/abs/0911.1223
Autor:
Macovei, M. A., Evers, J.
Publikováno v:
Phys. Rev. A 81, 013626 (2010)
The effect of collectivity on the loading of an atom laser via optical pumping is discussed. In our model, atoms in a beam are laser-excited and subsequently spontaneously decay into a trapping state. We consider the case of sufficiently high particl
Externí odkaz:
http://arxiv.org/abs/0911.0800
Publikováno v:
J. Phys.: Condens. Matter 20, 505205 (2008)
In this article we present a study of the electrical resistivity of Yb(Rh-xIrx)2Si2, x=0.06, under high pressure and in magnetic field. Ir substitution is expanding the unit cell and leads to a suppression of the antiferromagnetic transition temperat
Externí odkaz:
http://arxiv.org/abs/0810.2471
Publikováno v:
Phys. Rev. B 79, 024519 (2009)
Coherent control and the creation of entangled states are discussed in a system of two superconducting flux qubits interacting with each other through their mutual inductance and identically coupling to a reservoir of harmonic oscillators. We present
Externí odkaz:
http://arxiv.org/abs/0810.2453
Photon correlations and cross-correlations of light scattered by a regular structure of strongly driven atoms are investigated. At strong driving, the scattered light separates into distinct spectral bands, such that each band can be treated as indep
Externí odkaz:
http://arxiv.org/abs/quant-ph/0702142