Decoherence and Relaxation of a Quantum Bit in the Presence of Rabi Oscillations

Abstract

Dissipative dynamics of a quantum bit driven by a strong resonant field and interacting with a heat bath is investigated. We derive generalized Bloch equations and find modifications of the qubit's damping rates caused by Rabi oscillations. Nonequilibrium decoherence of a phase qubit inductively coupled to a LC-circuit is considered as an illustration of the general results. It is argued that recent experimental results give a clear evidence of effective suppression of decoherence in a strongly driven flux qubit.

14 pages; misprints corrected

References in corpus (8)

• Quantum state engineering with Josephson-junction devices
• Dynamical Decoupling of Open Quantum Systems
• Manipulating the Quantum State of an Electrical Circuit
• Dynamical suppression of decoherence in two-state quantum systems
• Coherent Quantum Dynamics of a Superconducting Flux Qubit
• A Superconducting Persistent Current Qubit
• Driven Tunneling Dynamics: Bloch-Redfield Theory versus Path Integral Approach
• Method for direct observation of coherent quantum oscillations in a superconducting phase qubit

Cited by in corpus (19)

• Rotating-frame relaxation as a noise spectrum analyzer of a superconducting qubit undergoing driven evolution
• Electromagnetically induced transparency and Autler-Townes splitting in superconducting flux quantum circuits
• Engineering Dynamical Sweet Spots to Protect Qubits from 1/$f$ Noise
• Entanglement spectroscopy of a driven solid-state qubit and its detector
• Achieving High-Fidelity Single-Qubit Gates in a Strongly Driven Charge Qubit with $1/f$ Charge Noise
• Decoherence of a Josephson qubit due to coupling to two level systems
• Rabi oscillations in a qubit coupled to a quantum two-level system
• Radio-Frequency Method for Investigation of Quantum Properties of Superconducting Structures
• Theory of weak continuous measurements in a strongly driven quantum bit
• Dynamics of a qubit coupled to a broadened harmonic mode at finite detuning
• Decoherence of a Driven Qubit
• Dynamic parity recovery in a strongly driven Cooper-pair box
• Spectroscopy of a driven solid-state qubit coupled to a structured environment
• High fidelity ac gate operations of the quantum dot hybrid qubit
• Driven-state relaxation of a coupled qubit-defect system in spin-locking measurements
• A theoretical investigation into the microwave spectroscopy of a phosphorus-donor charge-qubit in silicon: Coherent control in the Si:P quantum computer architecture
• The two Josephson junction flux qubit with large tunneling amplitude
• Energy Down Conversion between Classical Electromagnetic Fields via a Quantum Mechanical SQUID Ring
• Dynamic phases induced by two-level system defects on driven qubits