Decoherence and relaxation of qubits coupled to low- and medium-frequency Ohmic baths directly and via a harmonic oscillator
arXiv:0803.4364 · doi:10.1016/j.chemphys.2008.05.015
Abstract
Using the numerical path integral method we investigate the decoherence and relaxation of qubits in spin-boson (SB) and spin-intermediate harmonic oscillator (IHO)-bath (SIB) models. The cases that the environment baths with low and medium frequencies are investigated. It is shown that the qubits in SB and SIB models have the same decoherence and relaxation as the baths with low frequencies. However, the qubits in the two models have different decoherence and relaxation as the baths with medium frequencies. The decoherence and relaxation of the qubit in SIB model can be modulated through changing the coupling coefficients of the qubit-IHO and IHO-bath and the oscillation frequency of the IHO.
5 pages, 6 figures
References in corpus (18)
- Theory of the spin bath
- Decoherence Rate of Semiconductor Charge Qubit Coupled to Acoustic Phonon Reservoir
- Decoherence and dissipation during a quantum XOR gate operation
- Dynamics of the spin-boson model with a structured environment
- Random Lindblad equations from complex environments
- Iterative algorithm versus analytic solutions of the parametrically driven dissipative quantum harmonic oscillator
- Crossover from nonadiabatic to adiabatic electron transfer reactions: Multilevel blocking Monte Carlo simulations
- Quantum dynamics in strong fluctuating fields
- Entanglement spectroscopy of a driven solid-state qubit and its detector
- Controlling decoherence of a two-level-atom in a lossy cavity
- Strong coupling theory for tunneling and vibrational relaxation in driven bistable systems
- Dissipation in Josephson qubits
- Initial Decoherence of Open Quantum Systems
- Non-Markov dynamics and phonon decoherence of a double quantum dot charge qubit
- Qubit Decoherence and Non-Markovian Dynamics at Low Temperatures via an Effective Spin-Boson Model
- Spectroscopy of a driven solid-state qubit coupled to a structured environment
- Decoherence and relaxation of a qubit coupled to an Ohmic bath directly and via an intermediate harmonic oscillator
- Coherence correlations in the dissipative two-state system