Zobrazeno 1 - 10
of 504
pro vyhledávání: '"Cirone M."'
Publikováno v:
New J. Phys. 11 (2009) 103055
We examine the time evolution of cold atoms (impurities) interacting with an environment consisting of a degenerate bosonic quantum gas. The impurity atoms differ from the environment atoms, being of a different species. This allows one to superimpos
Externí odkaz:
http://arxiv.org/abs/0909.2166
Publikováno v:
Phys. Rev. A 74, 012308 (2006)
We present a detailed, realistic analysis of the implementation of a proposal for a quantum phase gate based on atomic vibrational states, specializing it to neutral rubidium atoms on atom chips. We show how to create a double--well potential with st
Externí odkaz:
http://arxiv.org/abs/quant-ph/0603138
Publikováno v:
Eur. Phys. J. D 35, 165 (2005)
We present a simple scheme for implementing an atomic phase gate using two degrees of freedom for each atom and discuss its realization with cold rubidium atoms on atom chips. We investigate the performance of this collisional phase gate and show tha
Externí odkaz:
http://arxiv.org/abs/quant-ph/0505194
We examine the performance of a quantum phase gate implemented with cold neutral atoms in microtraps, when anharmonic traps are employed and the effects of finite temperature are also taken into account. Both the anharmonicity and the temperature are
Externí odkaz:
http://arxiv.org/abs/quant-ph/0312066
A free quantum particle in two dimensions with vanishing angular momentum (s-wave) in the form of a ring-shaped wave packet feels an attractive force towards the center of the ring, leading first to an implosion followed by an explosion.
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Externí odkaz:
http://arxiv.org/abs/quant-ph/0110116
Huygens' principle following from the d'Alembert wave equation is not valid in two-dimensional space. A Schrodinger particle of vanishing angular momentum moving freely in two dimensions experiences an attractive force - the quantum anti-centrifugal
Externí odkaz:
http://arxiv.org/abs/quant-ph/0108083
Publikováno v:
Phys.Rev.A65:022101,2002
In a two-dimensional world a free quantum particle of vanishing angular momentum experiences an attractive force. This force originates from a modification of the classical centrifugal force due to the wave nature of the particle. For positive energi
Externí odkaz:
http://arxiv.org/abs/quant-ph/0108069
We analyze the nonlinear relaxation of a complex ecosystem composed of many interacting species. The ecological system is described by generalized Lotka-Volterra equations with a multiplicative noise. The transient dynamics is studied in the framewor
Externí odkaz:
http://arxiv.org/abs/cond-mat/0107394
Publikováno v:
Z. Naturforsch, 56 a, 1-13 (2001)
We summarize unusual bound or localized states in quantum mechanics. Our guide through these intriguing phenomena is the classical physics of the upside-down pendulum. Taking advantage of the analogy between the corresponding Newton's equation of mot
Externí odkaz:
http://arxiv.org/abs/quant-ph/0102065
Publikováno v:
J. Phys. B 34, 4571 (2001)
We investigate the notion of Bose-Einstein condensation of interacting particles. The definition of the condensate is based on the existence of the dominant eigenvalue of the single-particle density matrix. The statistical properties and the characte
Externí odkaz:
http://arxiv.org/abs/cond-mat/0006359