Entanglement in dissipative dynamics of identical particles
Albert-Ludwigs-Universität Freiburg - Hermann-Herder-Straße 3, D-79104 Freiburg, Germany and Univerza v Ljubljani - Jadranska 19, SI-1000 Ljubljana, Slovenija
Received: 23 September 2013
Accepted: 28 November 2013
Entanglement of identical massive particles recently gained attention, because of its relevance in highly controllable systems, e.g., ultracold gases. It accounts for correlations among modes instead of particles, providing a different paradigm for quantum information. We prove that the entanglement of almost all states rarely vanishes in the presence of noise, and analyse the most relevant noise in ultracold gases: dephasing and particle losses. Furthermore, when the particle number increases, the entanglement decay can turn from exponential into algebraic.
PACS: 03.65.Yz – Decoherence; open systems; quantum statistical methods / 03.67.Mn – Entanglement measures, witnesses, and other characterizations / 67.85.-d – Ultracold gases, trapped gases
© EPLA, 2013