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Dephasing of qubits by transverse low-frequency noise

  • Yu. Makhlin
  • A. Shnirman
Quantum Information Science

Abstract

We analyze the dissipative dynamics of a two-level quantum system subject to low-frequency, e.g., 1/f noise, motivated by recent experiments with superconducting quantum circuits. We show that the effect of transverse linear coupling of the system to low-frequency noise is equivalent to that of quadratic longitudinal coupling. We further find the decay law of quantum coherent oscillations under the influence of both low-and high-frequency fluctuations, in particular, for the case of comparable rates of relaxation and pure dephasing.

PACS numbers

03.65.Yz 75.10.Jm 74.50.+r 85.25.Cp 

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Copyright information

© MAIK "Nauka/Interperiodica" 2003

Authors and Affiliations

  • Yu. Makhlin
    • 1
    • 2
  • A. Shnirman
    • 1
  1. 1.Institut für Theoretische FestkörperphysicUniversität KarlsruheKarlsruheGermany
  2. 2.Landau Institute for Theoretical PhysicsRussian Academy of SciencesMoscowRussia

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