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Interaction engineering for environmental probing

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arxiv 0706.0492 v1 pith:7OHPXS56 submitted 2007-06-04 quant-ph cond-mat.other

Interaction engineering for environmental probing

classification quant-ph cond-mat.other
keywords interactionobjectsotherprobingaddressingaffectingbipartiteconditions
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We study the conditions for the probing of an environment affecting one party of a bipartite system of interacting objects by measurements operated only on the other element. We show that entanglement plays no crucial role in such an environment-characterization. On the other hand, if an interaction is established between the two parties, information can be reliably gathered. This result holds for both discrete and continuous variables and helps in the interpretation of recent experiments addressing the properties of mesoscopic objects.

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