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Decoherence from ensembles of two-level fluctuators
Josef Schriefl, Yuriy Makhlin, Alexander Shnirman +1
1/f noise, the major source of dephasing in Josephson qubits, may be produced by an ensemble of two-level systems. Depending on the statistical properties of their distribution, th…
Decoherence in a superconducting quantum bit circuit
G. Ithier, E. Collin, P. Joyez +8
Decoherence in quantum bit circuits is presently a major limitation to their use for quantum computing purposes. We present experiments, inspired from NMR, that characterise decohe…
Low- and high-frequency noise from coherent two-level systems
Alexander Shnirman, Gerd Schön, Ivar Martin +1
Recent experiments indicate a connection between the low- and high-frequency noise affecting superconducting quantum systems. We explore the possibilities that both noises can be p…