Relaxation processes in solid-state two-qubit gates

We consider a solid-state two-qubit gate subject to relaxation processes originated by transverse and longitudinal fluctuations of the single-qubit Hamiltonians. We model each noise component as a bosonic bath characterized by a specific power spectrum. We specialize our analysis to a i - SWAP gate...

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Bibliographic Details
Published inPhysica. E, Low-dimensional systems & nanostructures Vol. 42; no. 3; pp. 439 - 443
Main Authors Paladino, E., D’Arrigo, A., Mastellone, A., Falci, G.
Format Journal Article Conference Proceeding
LanguageEnglish
Published Amsterdam Elsevier B.V 2010
Elsevier
Subjects
Classical and quantum physics: mechanics and fields
Exact sciences and technology
Noise
Physics
Quantum computation
Quantum dissipative systems
Quantum information
Quantum mechanics
Quantum dissipative systems
Noise
Quantum computation
Quantum system
Fluctuations
Power spectra
Qubit
Background noise
Switching
Quantum bit
Solid state
Relaxation
Quantum computing
Josephson effect
Hamiltonians
Dissipation
Quantum information
High frequency
Gates
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ISSN1386-9477
DOI10.1016/j.physe.2009.06.042

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Summary:We consider a solid-state two-qubit gate subject to relaxation processes originated by transverse and longitudinal fluctuations of the single-qubit Hamiltonians. We model each noise component as a bosonic bath characterized by a specific power spectrum. We specialize our analysis to a i - SWAP gate implemented by Josephson qubits in a fixed coupling scheme. For high-frequency noise spectra extrapolated from single-qubit experiments we estimate the efficiency of the i - SWAP gate from the decay of anti-correlations between single-qubit switching probabilities.
ISSN:1386-9477
DOI:10.1016/j.physe.2009.06.042