منابع مشابه
Notes on decoherence at absolute zero
The problem of electron decoherence at low-temperature is analyzed from the perspective of recent experiments on decoherence rate measurement and on related localization phenomena in low-dimensional systems. The importance of decoherence at zero temperature, perhaps induced by quantum #uctuations, is put in a broader context. ( 2000 Elsevier Science B.V. All rights reserved.
متن کاملDecoherence at zero temperature
Most discussions of decoherence in the literature consider the high temperature regime but it is also known that, in the presence of dissipation, decoherence can occur even at zero temperature. Whereas most previous investigations all assumed initial decoupling of the quantum system and bath, we consider that the system and environment are entangled at all times. Here, we discuss decoherence fo...
متن کاملInitial correlations effects on decoherence at zero temperature
We consider a free charged particle interacting with an electromagnetic bath at zero temperature. The dipole approximation is used to treat the bath wavelengths larger than the width of the particle wave packet. The effect of these wavelengths is described then by a linear Hamiltonian whose form is analogous to phenomenological Hamiltonians previously adopted to describe the free particle-bath ...
متن کاملTrapped individual ion at absolute zero temperature.
Laser cooling and ion trapping have progressed to such an extent that one can now speak of realizing a confined atom at absolute zero temperature. In this short publication, we analyze an experiment toward such realization using a single Ba(+) ion in a miniature rf trap. The Ba(+) ion is first laser-cooled to the limit where the ion spends most of its time in the zero-point energy state. Then a...
متن کاملNotes on absolute Hodge classes
Absolute Hodge classes first appear in Deligne’s proof of the Weil conjectures for K3 surfaces in [14] and are explicitly introduced in [16]. The notion of absolute Hodge classes in the singular cohomology of a smooth projective variety stands between that of Hodge classes and classes of algebraic cycles. While it is not known whether absolute Hodge classes are algebraic, their definition is bo...
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ژورنال
عنوان ژورنال: Physica B: Condensed Matter
سال: 2000
ISSN: 0921-4526
DOI: 10.1016/s0921-4526(99)01833-5