منابع مشابه
Non-Markovian qubit decoherence during dispersive readout
We study qubit decoherence under generalized dispersive readout, i.e., we investigate a qubit coupled to a resonantly driven dissipative harmonic oscillator. We provide a complete picture by allowing for arbitrarily large qubit-oscillator detuning and by considering also a coupling to the square of the oscillator coordinate, which is relevant for flux qubits. Analytical results for the decohere...
متن کاملNon-Markovian qubit dynamics in the presence of 1/f noise
Within the lowest-order Born approximation, we calculate the exact dynamics of a qubit in the presence of 1/f noise, without Markov approximation. We show that the non-Markovian qubit timeevolution exhibits asymmetries and beatings that can be observed experimentally and cannot be explained within a Markovian theory. The present theory for 1/f noise is relevant for both spinand superconducting ...
متن کاملNon-Markovian dynamics of a qubit coupled to an Ising spin bath
Hari Krovi, Ognyan Oreshkov, Mikhail Ryazanov, and Daniel A. Lidar Department of Electrical Engineering, University of Southern California, Los Angeles, California 90089, USA Department of Physics, University of Southern California, Los Angeles 90089, USA Department of Chemistry, University of Southern California, Los Angeles, California 90089, USA Received 13 July 2007; published 28 November 2007
متن کاملQubit Decoherence and Non-Markovian Dynamics at Low Temperatures via an Effective Spin-Boson Model
Quantum Brownian oscillator model (QBM), in the Fock-space representation, can be viewed as a multi-level spin-boson model. At sufficiently low temperature, the oscillator degrees of freedom are dynamically reduced to the lowest two levels and the system behaves effectively as a two-level (E2L) spin-boson model (SBM) in this limit. We discuss the physical mechanism of level reduction and analyz...
متن کاملNon-markovian dynamics of a biased qubit coupled to a structured bath.
A new analytical approach, beyond the rotating wave approximation, based on unitary transformations and the non-markovian master equation for the density operator, is applied to treat the biased spin-boson model with a Lorentzian structured bath for arbitrary detunings at zero temperature. Compared to zero bias, we find that the non-equilibrium dynamics demonstrates two more damping oscillation...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Science Bulletin
سال: 2016
ISSN: 2095-9273
DOI: 10.1007/s11434-016-1089-8