Search results for "Classical environments"

showing 3 items of 3 documents

Experimental recovery of quantum correlations in absence of system-environment back-action

2013

Revivals of quantum correlations in composite open quantum systems are a useful dynamical feature against detrimental effects of the environment. Their occurrence is attributed to flows of quantum information back and forth from systems to quantum environments. However, revivals also show up in models where the environment is classical, thus unable to store quantum correlations, and forbids system-environment back-action. This phenomenon opens basic issues about its interpretation involving the role of classical environments, memory effects, collective effects and system-environment correlations. Moreover, an experimental realization of back-action-free quantum revivals has applicative rele…

PhysicsMultidisciplinaryQuantum decoherenceSettore FIS/02 - Fisica Teorica Modelli E Metodi MatematiciGeneral Physics and AstronomyNanotechnologyGeneral ChemistryQuantum entanglementclassical environments no back-actionSudden deathArticleGeneral Biochemistry Genetics and Molecular BiologyAction (physics)Flow (mathematics)quantum informationOpen quantum systemStatistical physicsQuantumquantum correlation
researchProduct

Hidden entanglement, system-environment information flow and non-Markovianity

2014

It is known that entanglement dynamics of two noninteracting qubits, locally subjected to classical environments, may exhibit revivals. A simple explanation of this phenomenon may be provided by using the concept of hidden entanglement, which signals the presence of entanglement that may be recovered without the help of nonlocal operations. Here we discuss the link between hidden entanglement and the (non-Markovian) flow of classical information between the system and the environment.

Quantum PhysicsPhysics and Astronomy (miscellaneous)Computer scienceFOS: Physical sciencesClassical environmentQuantum entanglementQuantum Physicsmemory effectsSettore FIS/03 - Fisica Della MateriaFlow (mathematics)Simple (abstract algebra)Qubitsystem-environment correlationInformation flow (information theory)Statistical physicsLink (knot theory)system-environment correlationsQuantum Physics (quant-ph)Classical environments
researchProduct

Recovering quantum correlations in classical environments without backaction: observation and interpretation

2014

Quantum correlations (entanglement, discord, nonlo-cality) present in a composite quantum system are essential resources for quantum information processing [1, 2]. However, the exploitation of these quantum resources is jeopardized by the detrimental effects of the environment surrounding the quantum system. For instance under Markovian noise, they decay asymptotically or disappear at a finite time [3, 4]. This drawback leads one to look for conditions where quantum correlations can be recovered during the evolution. To this aim non-Markovian noise, arising from strong couplings or structured environments, has been shown to be fundamental because of its memory effects. In fact, in the case …

open quantum systemclassical environmentsQuantum correlationSettore FIS/03 - Fisica Della Materia
researchProduct