Decoherence due to internal mesoscopic environment: a possible experimental test

R. A. Webb, Pritiraj Mohanty, Manher Jariwala +2 more

Rodolfo Bonifacio, Stefano Olivares

We present a simple theoretical description of a recent QED experiment where damping of Rabi oscillations cannot be attributed to environment-induced decoherence (EID). We generalize a previous formalism to describe also nonexponential decay. The possibility of spontaneous intrinsic decoherence (SID), i.e., not due to interaction with environment or fluctuation of some internal parameter but of purely quantum mechanical origin, is discussed. Moreover an experimental cavity QED test of SID is suggested. These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

J. M. Raimond

John R. Ellis, N. E. Mavromatos, D.V. Nanopoulos

We discuss recent experimental evidence of decoherence in a laboratory mesoscopic system in a cavity, from which we draw analogies with the decoherence that we argue is induced by microscopic quantum-gravity fluctuations in the space-time background. We emphasize the parallel rôles played in both cases by dissipation through non-trivial vacuum fluctuations that trigger the collapse of an initially coherent quantum state. We review a phenomenological parametrization of possible effects of this kind in the neutral kaon system, where they would induce CPT violation, and describe some epxerimental tests.

Reinhold A. Bertlmann, Nicolai Friis

Abstract In this chapter we revisit the creation of an entangled kaon state where the particles comprising the relevant pair propagate in to opposite directions. Experimental tests of Bell inequalities in particle physics are difficult and feature loopholes for local realistic models. Although such Bell tests are of fundamental interest, the examination of entanglement rather than non-locality for meson-antimeson pairs might be more feasible. To examine the possibilities and challenges for such tests, it is useful to study possible mechanisms for decoherence that might influence the quality of the entanglement. We consider possible decoherence effects arising from interactions of the quantum system with its environment: strong-interaction scatterings of kaons with nucleons, weak-interaction decays, as well as experimental noise. We concentrate on a specific model of decoherence developed by Bertlmann and Grimus that allows us to quantify the strength of such possible decoherence effects by the data of existing experiments

Urbashi Satpathi