Effect of bath temperature on the quantum decoherence

Abstract

The dynamics of a qubit in two different environments are investigated theoretically. The first environment is a two level system coupled to a bosonic bath. And the second one is a damped harmonic oscillator. Based on a unitary transformation, we find that the decoherence of the qubit can be reduced with increasing temperature $T$ in the first case, which agree with the results in [Phys. Rev. Lett. 100, 120401], whereas, it can not be reduced with $T$ in the second case. In both cases, the qubit dynamics are changed substantially as the coupling increases or finite detuning appears.

10 pages, 5 figures

References in corpus (16)

• Superconducting Circuits and Quantum Information
• Low- and high-frequency noise from coherent two-level systems
• Optimal control of a qubit coupled to a non-Markovian environment
• Non-Markovian qubit dynamics in the presence of 1/f noise
• Charge qubit dynamics in a double quantum dot coupled to phonons
• One- and two-photon spectroscopy of a flux qubit coupled to a microscopic defect
• Dissipative dynamics of a biased qubit coupled to a harmonic oscillator: Analytical results beyond the rotating wave approximation
• Characterization of coherent impurity effects in solid state qubits
• Rabi spectroscopy of a strongly driven qubit-fluctuator system
• Dynamics of a qubit coupled to a broadened harmonic mode at finite detuning
• Quantum decoherence reduction by increasing the thermal bath temperature
• Probing a composite spin-boson environment
• Non-Markovian dynamics of a biased qubit coupled to a structured bath
• Dissipative dynamics of a two - level system resonantly coupled to a harmonic mode
• Decoherence and relaxation of qubits coupled to low- and medium-frequency Ohmic baths directly and via a harmonic oscillator
• Decoherence and relaxation of a qubit coupled to an Ohmic bath directly and via an intermediate harmonic oscillator

Cited by in corpus (6)

• Quantum Zeno and anti-Zeno effects in quantum dissipative systems
• Non-Markovian temperature sensing
• Effect of bath temperature on the decoherence of quantum dissipative systems
• Heat transfer in a nonequilibrium spin-boson model: A perturbative approach
• Open quantum systems in thermal non-ergodic environments
• Quantum evolution speed in the finite-temperature bosonic environment