Search results for " FLUX QUBIT"

showing 3 items of 3 documents

Freezing the dynamics of a rf SQUID qubit via its strong coupling to a quantized microwave field

2004

In this paper we show the results concerning the study of the dynamics of a rf SQUID qubit exposed to a quantized monochromatic microwave source in the strong coupling limit. We bring out more details of the possibility both of controlling and hindering the oscillations between the two qubit flux states when we consider opportunely prepared initial field states. The importance of conceiving of such kinds of theoretical schemes in view of possible applications in the context of quantum computing is briefly discussed.

PhysicsFlux qubitCharge qubitPhysics and Astronomy (miscellaneous)Quantum computers Quantum optics flux qubitsAtomic and Molecular Physics and OpticsPhase qubitsymbols.namesakeQuantum mechanicsQubitsymbolsQuantum informationHamiltonian (quantum mechanics)MicrowaveQuantum computerJournal of Optics B: Quantum and Semiclassical Optics
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Generation of multipartite entangled states in Josephson architectures

2006

We propose and analyze a scheme for the generation of multipartite entangled states in a system of inductively coupled Josephson flux qubits. The qubits have fixed eigenfrequencies during the whole process in order to minimize decoherence effects and their inductive coupling can be turned on and off at will by tuning an external control flux. Within this framework, we will show that a W state in a system of three or more qubits can be generated by exploiting the sequential one by one coupling of the qubits with one of them playing the role of an entanglement mediator.

PhysicsQuantum computers Quantum optics flux qubitsQuantum PhysicsBell stateFlux qubitCondensed Matter - SuperconductivityCluster stateFOS: Physical sciencesWIGNER-FUNCTIONQuantum entanglementQuantum PhysicsQUANTUM-STATECondensed Matter PhysicsCOMPUTATIONElectronic Optical and Magnetic MaterialsSuperconductivity (cond-mat.supr-con)MultipartiteComputer Science::Emerging TechnologiesQuantum mechanicsTOMOGRAPHYW stateQuantum Physics (quant-ph)Superconducting quantum computingEntanglement distillationCHARGE QUBITS
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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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