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Enhancement of quantum speed limit time due to cooperative effects in multilevel systems
(IOP Publishing, 2015-08)
Deriving minimum evolution times is of paramount importance in quantum mechanics. Bounds on the speed of evolution are given by the so called quantum speed limit (QSL). In this work we use quantum optimal control methods ...
The classical limit of non-integrable quantum systems, a route to quantum chaos
(Elsevier, 2006-04)
The classical limit of non-integrable quantum systems is studied. We define non-integrable quantum systems as those, which have, as their classical limit, a non-integrable classical system. This quantum systems will be the ...
Multiple classical limits in relativistic and nonrelativistic quantum mechanics
(AMER INST PHYSICS, 2009)
The existence of a classical limit describing the interacting particles in a second-quantized theory of identical particles with bosonic symmetry is proved. This limit exists in addition to the previously established ...
Sensitivity to perturbations and quantum phase transition
(Amer Physical Soc, 2013-05-17)
The local density of states or its Fourier transform, usually called fidelity amplitude, are important measures of quantum irreversibility due to imperfect evolution. In this Rapid Communication we study both quantities ...
Genesis of quantum nonlocality
(ELSEVIER SCIENCE BV, 2011)
We revisit the problem of an otherwise classical particle immersed in the zero-point radiation field, with the purpose of tracing the origin of the nonlocality characteristic of Schrodinger`s equation. The Fokker-Planck-type ...
Towards a definition of the quantum ergodic hierarchy: ergodicity and mixing
(Elsevier Science, 2009-02)
In a previous paper we have given a general framework for addressing the definition of quantum chaos by identifying the conditions that a quantum system must satisfy to lead to non-integrability in its classical limit. ...
Classical limit and quantum logic
(Springer/Plenum Publishers, 2018-02)
The analysis of the classical limit of quantum mechanics usually focuses on the state of the system. The general idea is to explain the disappearance of the interference terms of quantum states appealing to the decoherence ...
A method to improve quantum state fidelity in circuits executed on ibm’s quantum computers
(2021-01-01)
Recently, various quantum computing and communication tasks have been implemented using IBM’s superconductivity-based quantum computers. Here, we show that the circuits used in most of those works were not optimized and ...
Template-based mapping of reversible circuits to IBM quantum computers
(2022-04-01)
In order to make the most of the increasing computational power of recently developed quantum computers, it is crucial to perform an efficient mapping of a given quantum circuit that realizes the desired quantum algorithm ...
Entropy effect in quantum computing and information: an open-source environment simulation
(2014)
The technologies are rapidly developing, but some of them present in the computers, as for instance their processing capacity, are reaching their physical limits. It is up to quantum computation offer solutions to these ...