Freiburg 2019 – wissenschaftliches Programm
FM 35.1: Talk
Dienstag, 24. September 2019, 14:00–14:15, 2004
Evolution of quantum coherence — •Jan Sperling1,2 and Ian Walmsley2,3 — 1University of Paderborn, Warburger Str. 100, 33098 Paderborn, Germany — 2Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, UK — 3Imperial College London, Exhibition Road, London SW7 2AZ, UK
Quantum interference phenomena have been identified as a versatile resource for quantum information processing, leading to the notion of quantum coherence. In this contribution, we discuss the concept of temporal quantum coherence. In contrast to the commonly applied input-output formalism, we assess the quantum coherence of a process by deriving equations of motions for the classical, i.e., incoherent, evolution of a system. When compared to the quantum dynamics, this approach enables us to study the quantum properties of a system's evolution itself, independently of or in conjunction with the coherence of initial and final states. As an example, we apply our theoretical framework to characterize the dynamics of entanglement, being one form of quantum coherence, in correlated many-body systems.