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Quantum Chaos, Dynamical Stability and Decoherence
Quantum Chaos Dynamical Stability Decoherence
2010/10/13
We discuss the stability of quantum motion under system’s perturbations in the light of the corresponding classical behavior. In particular we focus our attention on the so called “fidelity” or Loschm...
Decoherence and Loschmidt echoes: Quantum against Classical
Decoherence and Loschmidt echoes Quantum against Classical
2010/10/13
Some recent theoretical results on the stability of quantum dynamics against perturbations of the Hamiltonian- the so-called Loschmidt echoes and their relation to various decoherence measures are rev...
Interferometry with Large Molecules: Exploration of Coherence, Decoherence and Novel Beam Methods
Large Molecules Coherence, Decoherence and Novel Beam Methods
2010/10/13
Quantum experiments with complex objects are of fundamental interest as they allow to quantitatively trace the quantum-to-classical transition under the influence of various interactions between the q...
The main steps in the development of the ideas on decoherence are briefly reviewed, together with their present achievements. Unsolved problems are also pointed out.
We provide a theoretical explanation for two recent experiments on decoherence of Aharonov-Bohm oscillations in two- and multi-terminal ballistic rings. We consider decoherence due to charge fluctuati...
We have developed quantitative description of quantum coherent oscillations in the system of two coupled qubits in the presence of weak decoherence that in general can be correlated between the two qu...
The present note is devoted to a critique of some aspects of current decoherence theory.
Its main point is that several common claims related to decoherence theory are based on
questionable hidden a...
New strategy for suppressing decoherence in quantum computation
New strategy suppressing decoherence quantum computation
2010/10/13
Controlable strong interaction of the qubit’s bath with an external system(i.e. with the bath’s environment) allows for choosing the conditions under which the decoherence of the qubit’s states can be...
We consider a wave packet of a charged particle passing through a cavity filled with photons at temperature T and investigate its localization and interference properties. It is shown that the wave pa...
Comment on "Hidden assumptions in decoherence theory"
Comment "Hidden assumptions in decoherence theory"
2010/10/15
It is shown that the conclusion of the paper “Hidden assumptions in decoherence theory” [1] is the result of a misunderstanding of the concept of pointer states. It is argued that pointer states are s...
Quantum Decoherence from Adiabatic Entanglement
Quantum Decoherence Adiabatic Entanglement
2010/10/15
In order to understand quantum decoherence of a quantum system due to its interaction with
a large system behaving classically, we introduce the concept of adiabatic quantum entanglement
based on th...