Abstract
In quantum mechanics, the eigenvalues and their corresponding probabilities specify the expectation value of a physical observable, which is known to be a statistical property related to large ensembles of particles. In contrast to this paradigm, we demonstrate a unique method allowing to extract the expectation value of a single particle, namely, the polarisation of a single protected photon, with a single experiment. This is the first realisation of quantum protective measurements.
Original language | English |
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Title of host publication | Quantum Technologies 2018 |
Editors | Miles J. Padgett, Andrew J. Shields, Jurgen Stuhler |
Publisher | SPIE |
ISBN (Electronic) | 9781510618749 |
DOIs | |
State | Published - 2018 |
Externally published | Yes |
Event | Quantum Technologies 2018 - Strasbourg, France Duration: 23 Apr 2018 → 25 Apr 2018 |
Publication series
Name | Proceedings of SPIE - The International Society for Optical Engineering |
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Volume | 10674 |
ISSN (Print) | 0277-786X |
ISSN (Electronic) | 1996-756X |
Conference
Conference | Quantum Technologies 2018 |
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Country/Territory | France |
City | Strasbourg |
Period | 23/04/18 → 25/04/18 |
Bibliographical note
Publisher Copyright:© 2018 SPIE.
Funding
This work has received funding from the European Union’s Horizon 2020 and the EMPIR Participating States in the context of the project EMPIR-14IND05 “MIQC2”, and from the INRIM “Seed” project “GeQuM”. E.C. was supported by ERC AdG NLST. L.V. acknowledges support of the Israel Science Foundation Grant No. 1311/14 and the German-Israeli Foundation for Scientific Research and Development Grant No. I-1275-303.14.
Funders | Funder number |
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INRIM | |
European Commission | |
German-Israeli Foundation for Scientific Research and Development | |
Israel Science Foundation | 1311/14 |
Horizon 2020 | EMPIR-14IND05 |
Keywords
- expectation value
- foundations of quantum mechanics
- protective measurements
- quantum metrology
- quantum optics
- single photons