2009/11/25 by D. Valente, D. M. Valente, A. O. Caldeira · 1 citation
Computer Science · Mathematics · Physics and Astronomy · #Advanced Thermodynamics and Statistical Mechanics #Bipartite graph #Brownian motion #Coupling (piping) #Logarithm #Materials science #Mathematical analysis #Mathematics #Monotonic function #Physics #Quantum #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum entanglement #Quantum mechanics #Quantum system #Range (aeronautics) #Statistical physics #Thermal #Thermal equilibrium #Thermodynamics #quant-ph
paper · pdf · doi:10.1103/physreva.81.012117
published as Phys. Rev. A 81, 012117 (2010) · 8 pages, 1 figure
arxiv created 2009/11/25 · openalex publication_date 2010/01/26 · arxiv updated 2011/07/05 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The influence of the environment in the thermal equilibrium properties of a bipartite continuous variable quantum system is studied. The problem is treated within a system-plus-reservoir approach. The considered model reproduces the Brownian motion when the two particles are isolated and induces an effective interaction between them, depending on the choice of the spectral function of the bath. The coupling between the system and the environment guarantees the translational invariance of the system in the absence of an external potential. The entanglement between the particles is measured by the logarithmic negativity, which is shown to monotonically decrease with the increase of the temperature. A range of finite temperatures is found in which entanglement is still induced by the reservoir.