0000000000505921

AUTHOR

Marco Berritta

showing 2 related works from this author

Design of a Lambda system for population transfer in superconducting nanocircuits

2013

The implementation of a Lambda scheme in superconducting artificial atoms could allow detec- tion of stimulated Raman adiabatic passage (STIRAP) and other quantum manipulations in the microwave regime. However symmetries which on one hand protect the system against decoherence, yield selection rules which may cancel coupling to the pump external drive. The tradeoff between efficient coupling and decoherence due to broad-band colored Noise (BBCN), which is often the main source of decoherence is addressed, in the class of nanodevices based on the Cooper pair box (CPB) design. We study transfer efficiency by STIRAP, showing that substantial efficiency is achieved for off-symmetric bias only i…

Quantum decoherenceStimulated Raman adiabatic passageFOS: Physical sciencesSINGLE COOPER PAIR ADIABATIC PASSAGE QUANTUM STATES FLUX QUBIT SPECTROSCOPY MOLECULES CIRCUIT ATOMS NOISE BOX01 natural sciencesNoise (electronics)Settore FIS/03 - Fisica Della Materia010305 fluids & plasmasSuperconductivity (cond-mat.supr-con)Quantum mechanics0103 physical sciencesMesoscale and Nanoscale Physics (cond-mat.mes-hall)010306 general physicsQuantumQuantum computerPhysicsCouplingQuantum PhysicsCondensed Matter - Mesoscale and Nanoscale PhysicsCondensed Matter - SuperconductivityCondensed Matter PhysicsElectronic Optical and Magnetic MaterialsColors of noiseCooper pairQuantum Physics (quant-ph)
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Dynamics of a Quantum Particle in Asymmetric Bistable Potential with Environmental Noise

2011

In this work we analyze the dynamics of a quantum particle subject to an asymmetric bistable potential and interacting with a thermal reservoir. We obtain the time evolution of the population distributions in both energy and position eigenstates of the particle, for different values of the coupling strength with the thermal bath. The calculation is carried out using the Feynman-Vernon functional under the discrete variable representation.

PhysicsWork (thermodynamics)Physics and Astronomy (miscellaneous)BistabilityThermal reservoirTime evolutionBistable potential; Noise Enhanced Stability; Discrete Variable Representation; Caldeira-Leggett modelNoise Enhanced StabilitySettore FIS/03 - Fisica Della MateriaBistable potentialDVRPosition (vector)Quantum mechanicsThermalNESParticleEigenvalues and eigenvectorsDiscrete Variable RepresentationCaldeira-Leggett model
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