Freiburg 2019 – wissenschaftliches Programm

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FM: Fall Meeting

FM 52: Entanglement: Transport

FM 52.1: Invited Talk

Mittwoch, 25. September 2019, 14:00–14:30, 1009

Entanglement transport in the presence of noise — •Clemens Gneiting — Riken, Wako-shi, Saitama 351-0198, Japan

The reliable transport of quantum properties, such as coherence and entanglement, constitutes one of the essential building blocks for the realization of quantum technologies, ranging from quantum communication devices to quantum computers. Think, for instance, of the distribution of entangled photon pairs in quantum cryptography protocols, or of quantum sensors leveraging many-particle interference. Among the main obstacles towards the successful implementation of such devices is noise, stemming both from the undesired coupling to an environment (dissipation and decoherence) and from uncontrolled parameter fluctuations within the devices themselves (disorder). We review strategies towards mitigating and counteracting the detrimental effects of noise in entanglement transport. In particular, we discuss how different ways of encoding the quantum information can result in noise-prone or noise-robust entanglement transport. We present quantum master equations as a unifying framework to analyze the different noise sources.