0000000000614106

AUTHOR

I. Fuentes-guridi

showing 3 related works from this author

Geometric phase in open systems.

2003

We calculate the geometric phase associated to the evolution of a system subjected to decoherence through a quantum-jump approach. The method is general and can be applied to many different physical systems. As examples, two main source of decoherence are considered: dephasing and spontaneous decay. We show that the geometric phase is completely insensitive to the former, i.e. it is independent of the number of jumps determined by the dephasing operator.

PhysicsSpontaneous decaySpontaneous decayDensity matrixQuantum PhysicsQuantum decoherenceMarkovian master equationDephasingOperator (physics)Physical systemGeneral Physics and AstronomyFOS: Physical sciencesCondensed Matter::Mesoscopic Systems and Quantum Hall EffectGeometric phaseBerrys phaseStatistical physicsQuantum Physics (quant-ph)Physical review letters
researchProduct

Vacuum induced spin-1/2 Berry's phase.

2002

We calculate the Berry phase of a spin-1/2 particle in a magnetic field considering the quantum nature of the field. The phase reduces to the standard Berry phase in the semiclassical limit and eigenstate of the particle acquires a phase in the vacuum. We also show how to generate a vacuum induced Berry phase considering two quantized modes of the field which has a interesting physical interpretation.

PhysicsQuantum PhysicsCondensed matter physicsField (physics)Phase (waves)General Physics and AstronomySemiclassical physicsFOS: Physical sciencesVacuum Geometric phaseNonlinear Sciences::Chaotic DynamicsQuantization (physics)Geometric phaseQuantum mechanicsQuantum theoryBerry connection and curvatureQuantum field theorySpin (physics)Quantum Physics (quant-ph)Physical review letters
researchProduct

Spin-1/2 geometric phase driven by decohering quantum fields

2003

We calculate the geometric phase of a spin-1/2 system driven by a one and two mode quantum field subject to decoherence. Using the quantum jump approach, we show that the corrections to the phase in the no-jump trajectory are different when considering an adiabatic and non-adiabatic evolution. We discuss the implications of our results from both the fundamental as well as quantum computational perspective.

PhysicsMarkov processeQuantum discordQuantum PhysicsQuantum dynamicsGeneral Physics and AstronomyQuantum simulatorFOS: Physical sciencesOpen quantum systemClassical mechanicsQuantum error correctionquantum fieldQuantum mechanicsQuantum processQuantum algorithmQuantum dissipationQuantum Physics (quant-ph)
researchProduct