Protective Measurement -- a new quantum measurement paradigm: detailed description of the first realisation

• URL: http://arxiv.org/abs/2103.15711v1
• Date: Mon, 29 Mar 2021 15:50:19 GMT
• Title: Protective Measurement -- a new quantum measurement paradigm: detailed description of the first realisation
• Authors: Enrico Rebufello, Fabrizio Piacentini, Alessio Avella, Rudi Lussana, Federica Villa, Alberto Tosi, Marco Gramegna, Giorgio Brida, Eliahu Cohen, Lev Vaidman, Ivo Pietro Degiovanni, Marco Genovese
• Abstract summary: We present a detailed description of the experiment realising for the first time a protective measurement. This is a novel measurement protocol which combines weak interactions with a protection mechanism'' preserving the measured state coherence.
• Score: 0.5455208307070661
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We present a detailed description of the experiment realising for the first time a protective measurement, a novel measurement protocol which combines weak interactions with a ``protection mechanism'' preserving the measured state coherence during the whole measurement process. Furthermore, protective measurement allows finding the expectation value of an observable, i.e. an inherently statistical quantity, by measuring a single particle, without the need of any statistics. This peculiar property, in sharp contrast with the framework of traditional (projective) quantum measurement, might constitute a groundbreaking advance for several quantum technology related fields.

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