Entanglement formation under random interactions. (10th December 2015)

• Record Type: Journal Article
• Authors: Wick, Christoph; Um, Jaegon; Hinrichsen, Haye
• Is Part Of: Journal of physics. Volume 49:Number 2(2016)
• Publication Date: 2015-12-10
• Subjects: entanglement -- two qubit system -- SU(4) metric; Mathematical physics -- Periodicals; Statistical physics -- Periodicals; Quantum theory -- Periodicals; Matter -- Properties -- Periodicals; 530.105
• DOI: 10.1088/1751-8113/49/2/025303
• Languages: English
• ISSNs: 1751-8113

Abstract

Abstract: The temporal evolution of the entanglement between two qubits evolving by random interactions is studied analytically and numerically. Two different types of randomness are investigated. Firstly we analyze an ensemble of systems with randomly chosen but time-independent interaction Hamiltonians. Secondly we consider the case of a temporally fluctuating Hamiltonian, where the unitary evolution can be understood as a random walk on the SU (4) group manifold. As a by-product we compute the metric tensor and its inverse as well as the Laplace–Beltrami for SU (4).