Decoherence of two qubits in non-Markovian reservoirs without the rotating-wave approximation

2008/06/30 by Wang Fa-Qiang, Fa-Qiang Wang, Zhi‐Ming Zhang +3 · 24 citations
Computer Science · Mathematics · Physics and Astronomy · #Coupling (piping) #Markov process #Master equation #Mathematics #Physics #Quantum #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum decoherence #Quantum mechanics #Quantum optics and atomic interactions #Qubit #Rotating wave approximation #Superconducting quantum computing #quant-ph

paper · pdf · doi:10.1103/physreva.78.062318

published in Physical Review A 78(6) (American Physical Society)

arxiv created 2008/07/11 · openalex publication_date 2008/12/09 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

The decoherence of two initially entangled qubits in non-Markovian reservoirs has been investigated exactly without Born-Markovian approximation or rotating-wave approximation (RWA). The nonperturbative quantum master equation is derived and its exact solution is obtained. The decoherence behavior of two qubits, initially entangled in Bell states, has been investigated in the weak coupling regime and strong coupling regime. The results show that the counter-rotating wave terms have obvious influence on the decoherence behavior in the non-Markovian regime.

Citations

• Exact master equation and quantum decoherence of two coupled harmonic oscillators in a general environment
• Entanglement of Formation of an Arbitrary State of Two Qubits
• Disentanglement and decoherence by open system dynamics
• Finite-Time Disentanglement Via Spontaneous Emission
• Population trapping due to cavity losses
• Quantum measurement of a coupled nanomechanical resonator–Cooper-pair box system

Cited by

• Non-Markovian dynamics of quantum discord
• Interplay between entanglement and entropy in two-qubit systems