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Sequential Strong Measurements and Heat Vision

Navascués Cobo, Miguel and Pérez García, David (2010) Sequential Strong Measurements and Heat Vision. (Submitted)

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Official URL: http://arxiv.org/abs/1010.4983

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Abstract

We study scenarios where a finite set of non-demolition von-Neumann measurements are available. We note that, in some situations, repeated application of such measurements allows estimating an infinite number of parameters of the initial quantum state, and illustrate the point with a physical example. We then move on to study how the system under observation is perturbed after several rounds of projective measurements. While in the finite dimensional case the effect of this perturbation always saturates, there are some instances of infinite dimensional systems where such a perturbation is accumulative, and the act of retrieving information about the system increases its energy indefinitely (i.e., we have `Heat Vision'). We analyze this effect and discuss a specific physical system with two dichotomic von-Neumann measurements where Heat Vision is expected to show.

Item Type:Article
Additional Information:Last revised 21 Dec 2010 (this version, v2)
Uncontrolled Keywords:Teoría cuántica, Quantum Physics
Subjects:Sciences > Physics > Quantum theory
ID Code:12152
Deposited On:02 Feb 2011 16:30
Last Modified:02 Feb 2011 16:30

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