Title:	The Quantum Cheshire Cateffect: Theoretical basis and observational implications
Authors:	Duprey, Q Kanjilal, S Sinha, Urbasi Home, D. Matzkin, A
Issue Date:	3-Feb-2018
Publisher:	Elsevier B. V.
Citation:	Annals of Physics, 2018, Vol.391, p1-15
Abstract:	The Quantum Cheshire Cat (QCC) is an effect introduced recently within the Weak Measurements framework. The main feature of the QCC effect is that a property of a quantum particle appears to be spatially separated from its position. The status of this effect has however remained unclear, as claims of experimental observation of the QCC have been disputed by strong criticism of the experimental as well as the theoretical aspects of the effect. In this paper we clarify in what precise sense the QCC can be regarded as an unambiguous consequence of the standard quantum mechanical formalism applied to describe quantum pointers weakly coupled to a system. In light of this clarification, the raised criticisms of the QCC effect are rebutted. We further point out that the limitations of the experiments performed to date imply that a loophole-free experimental demonstration of the QCC has not yet been achieved.
Description:	Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations)
URI:	http://hdl.handle.net/2289/6879
ISSN:	0003-4916
Alternative Location:	https://arxiv.org/abs/1703.02959 https://doi.org/10.1016/j.aop.2018.01.011
Copyright:	©2018 Elsevier Inc.
Appears in Collections:	Research Papers (LAMP)

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