Search results for " Qubits"

showing 3 items of 13 documents

Universal freezing of quantum correlations within the geometric approach

2015

Quantum correlations in a composite system can be measured by resorting to a geometric approach, according to which the distance from the state of the system to a suitable set of classically correlated states is considered. Here we show that all distance functions, which respect natural assumptions of invariance under transposition, convexity, and contractivity under quantum channels, give rise to geometric quantifiers of quantum correlations which exhibit the peculiar freezing phenomenon, i.e., remain constant during the evolution of a paradigmatic class of states of two qubits each independently interacting with a non-dissipative decohering environment. Our results demonstrate from first …

Settore FIS/02 - Fisica Teorica Modelli E Metodi MatematiciFOS: Physical sciencesQuantum entanglementArticleConvexityInformation theory and computation Qubits Quantum information Open quantum systems quantum correlationsStatistical physicsQAQuantumQCCondensed Matter - Statistical MechanicsMathematical PhysicsPhysicsQuantum PhysicsMultidisciplinaryStatistical Mechanics (cond-mat.stat-mech)Probability and statisticsState (functional analysis)Mathematical Physics (math-ph)Quantum technologyPhysics - Data Analysis Statistics and ProbabilityQubitConstant (mathematics)Quantum Physics (quant-ph)Data Analysis Statistics and Probability (physics.data-an)
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Telecom-compatible, affordable and scalable quantum technologies

2022

The realistic implementation of quantum architectures relies on the development of scalable, resource-efficient platforms that are compatible with CMOS technologies as well as fiber networks. This work demonstrates novel schemes utilized for time-/frequency-bin entanglement generation and processing by leveraging existing telecommunications and integrated photonics infrastructures.

Settore ING-INF/02 - Campi ElettromagneticiIntegrated quantum optics complex photon states quantum frequency combs silicon-based chips microring resonators spiral waveguides integrated Mach-Zehnder interferometers discrete time and frequency modes photonic qubits and qudits
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Binding Sites, Vibrations and Spin-Lattice Relaxation Times in Europium(II)-Based Metallofullerene Spin Qubits.

2021

Abstract To design molecular spin qubits with enhanced quantum coherence, a control of the coupling between the local vibrations and the spin states is crucial, which could be realized in principle by engineering molecular structures via coordination chemistry. To this end, understanding the underlying structural factors that govern the spin relaxation is a central topic. Here, we report the investigation of the spin dynamics in a series of chemically designed europium(II)‐based endohedral metallofullerenes (EMFs). By introducing a unique structural difference, i. e. metal‐cage binding site, while keeping other molecular parameters constant between different complexes, these manifest the ke…

Spin statesFOS: Physical scienceschemistry.chemical_element010402 general chemistry01 natural sciencesMolecular physicsCatalysischemistry.chemical_compoundVery Important PaperPhysics - Chemical PhysicsPhysics::Atomic and Molecular ClustersPhysics - Atomic and Molecular Clustersspin-vibration couplingQuantumeuropiumSpin-½Chemical Physics (physics.chem-ph)Full Paper010405 organic chemistryChemistryNanotecnologiaOrganic ChemistryRelaxation (NMR)Spin–lattice relaxationfullerenesGeneral ChemistryQuímicaFull Papers0104 chemical sciences3. Good healthQubitMetallofullerenemagnetic propertiesAtomic and Molecular Clusters (physics.atm-clus)Europiumspin qubitsChemistry (Weinheim an der Bergstrasse, Germany)
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