Quantum dynamics in nonequilibrium environments
arXiv:0804.4869 · doi:10.1103/PhysRevA.78.032105
Abstract
We present a formalism for studying the behaviour of quantum systems coupled to nonequilibrium environments exhibiting nonGaussian fluctuations. We discuss the role of a qubit as a detector of the statistics of environmental fluctuations, as well as nonMarkovian effects in both weak and strong coupling limits. We also discuss the differences between the influences of classical and quantum environments. As examples of the application of this formalism we study the dephasing and relaxation of a charge qubit coupled to nonequillibrium electron transport through single and double quantum dots.
12 pages, 7 figures; significantly expanded version
References in corpus (31)
- Quantum state engineering with Josephson-junction devices
- Electron Counting Statistics and Coherent States of Electric Current
- Coherent manipulation of electronic states in a double quantum dot
- Decoherence in a superconducting quantum bit circuit
- Counting statistics of single-electron transport in a quantum dot
- Decoherence in Josephson Qubits from Junction Resonances
- Coherent and Collective Quantum Optical Effects in Mesoscopic Systems
- Decoherence and 1/f noise in Josephson qubits
- Time-dependent resonant tunneling via two discrete states
- Counting Statistics of Non-Markovian Quantum Stochastic Processes
- Low-frequency noise as a source of dephasing of a qubit
- Non-Gaussian low-frequency noise as a source of qubit decoherence
- Rate equations for quantum transport in multi-dot systems
- Full counting statistics of a general quantum mechanical variable
- Decoherence from ensembles of two-level fluctuators
- Noise enhancement due to quantum coherence in coupled quantum dots
- Counting statistics and super-Poissonian noise in a quantum dot
- Counting statistics and detector properties of quantum point contacts
- Frequency-dependent counting statistics in interacting nanoscale conductors
- Non-equilibrium Entanglement and Noise in Coupled Qubits
- Bimodal Counting Statistics in Single Electron Tunneling through a Quantum Dot
- Shot noise in coupled dots and the "fractional charges"
- Low-Temperature Decoherence of Qubit Coupled to Background Charges
- Coherence oscillations in dephasing by non-Gaussian shot noise
- Decoherence of a Josephson qubit due to coupling to two level systems
- Frequency-dependent current correlation functions from scattering theory
- Quantum mechanical approach to decoherence and relaxation generated by fluctuating environment
- Sensitivity and back-action in charge qubit measurements by a strongly coupled single-electron transistor
- A Josephson Junction Microscope for Low-frequency Fluctuators
- Rabi oscillations of a qubit coupled to a two-level system
- Current and current fluctuations in quantum shuttles
Cited by in corpus (9)
- On the second fluctuation--dissipation theorem for nonequilibrium baths
- Systematic Perturbation Theory for Dynamical Coarse-Graining
- Probing a composite spin-boson environment
- Dual-probe decoherence microscopy: Probing pockets of coherence in a decohering environment
- Geometry of quantum evolution in a nonequilibrium environment
- Coherent quantum ratchets driven by tunnel oscillations: Fluctuations and correlations
- Qubit quantum-dot sensors: noise cancellation by coherent backaction, initial slips, and elliptical precession
- Decoherence and the retrieval of lost information
- Perturbative approach to the capacitive interaction between a sensor quantum dot and a charge qubit