Protective measurement—a new quantum measurement paradigm: Detailed description of the first realization

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

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

We present a detailed description of the experiment realizing 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 for any statistics. This peculiar property, in sharp contrast to the framework of traditional (projective) quantum measurement, might constitute a groundbreaking advance for several quantum technology related fields.

Original languageEnglish
Article number4260
JournalApplied Sciences (Switzerland)
Volume11
Issue number9
DOIs
StatePublished - 1 May 2021

Bibliographical note

Publisher Copyright:
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.

Funding

Funding: This work has been financed by the projects 17FUN01 ‘BeCOMe’ and 17FUN06 ‘SIQUST’, both funded from the EMPIR programme co-financed by the Participating States and from the European Union’s Horizon 2020 research and innovation program. It has also been supported in part by the Israel Science Foundation Grant No. 2064/19 and the National Science Foundation—US–Israel Binational Science Foundation Grant No. 735/18. E.C. was supported by Grant No. FQXi-RFP-CPW-2006 from the Foundational Questions Institute and Fetzer Franklin Fund, a donor advised fund of Silicon Valley Community Foundation, the Israel Innovation Authority under Projects No. 70002 and No. 73795, the Quantum Science and Technology Program of the Israeli Council of Higher Education, and the Pazy Foundation. This work has been financed by the projects 17FUN01 ?BeCOMe? and 17FUN06 ?SIQUST?, both funded from the EMPIR programme co-financed by the Participating States and from the European Union?s Horizon 2020 research and innovation program. It has also been supported in part by the Israel Science Foundation Grant No. 2064/19 and the National Science Foundation?US?Israel Binational Science Foundation Grant No. 735/18. E.C. was supported by Grant No. FQXi-RFP-CPW2006 from the Foundational Questions Institute and Fetzer Franklin Fund, a donor advised fund of Silicon Valley Community Foundation, the Israel Innovation Authority under Projects No. 70002 and No. 73795, the Quantum Science and Technology Program of the Israeli Council of Higher Education, and the Pazy Foundation.

FundersFunder number
Fetzer Franklin Fund
Israel Innovation Authority70002, 73795
National Science Foundation?US?Israel Binational Science Foundation
Quantum Science and Technology Program of the Israeli Council of Higher Education
National Science Foundation
Silicon Valley Community Foundation
Foundational Questions Institute
Horizon 2020 Framework Programme
European Metrology Programme for Innovation and Research
United States-Israel Binational Science FoundationFQXi-RFP-CPW-2006, 735/18
Israel Science Foundation2064/19
PAZY Foundation

    Keywords

    • Protective measurements
    • Quantum measurements
    • Quantum optics

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