Search results for " spin models"

showing 2 items of 2 documents

Spin‐Chain‐Star Systems: Entangling Multiple Chains of Spin Qubits

2022

We consider spin-chain-star systems characterized by N-wise many-body interactions between the spins in each chain and the central one. We show that such systems can be exactly mapped into standard spin-star systems through unitary transformations. Such an approach allows the solution of the dynamic problem of an XX$X X$ spin-chain-star model and transparently shows the emergence of quantum correlations in the system, based on the idea of entanglement between chains.

Quantum PhysicsSettore FIS/02 - Fisica Teorica Modelli E Metodi Matematicimulti-partite entanglement generationspin-chain-star systemsFOS: Physical sciencesGeneral Physics and Astronomymany-body interactionsCondensed Matter::Strongly Correlated ElectronsQuantum Physics (quant-ph)quantum spin models
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Non-Markovian dynamics of interacting qubit pair coupled to two independent bosonic baths

2009

The dynamics of two interacting spins coupled to separate bosonic baths is studied. An analytical solution in Born approximation for arbitrary spectral density functions of the bosonic environments is found. It is shown that in the non-Markovian cases concurrence "lives" longer or reaches greater values.

Statistics and ProbabilityPhysicsQuantum PhysicsSpinsnon-Markovian spin modelsDynamics (mechanics)FOS: Physical sciencesGeneral Physics and AstronomyMarkov processSpectral densityStatistical and Nonlinear PhysicsConcurrencesymbols.namesakeModeling and SimulationQubitQuantum mechanicssymbolsBorn approximationQuantum Physics (quant-ph)Mathematical Physics
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