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 language | English |
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Article number | 4260 |
Journal | Applied Sciences (Switzerland) |
Volume | 11 |
Issue number | 9 |
DOIs | |
State | Published - 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.
Funders | Funder number |
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Fetzer Franklin Fund | |
Israel Innovation Authority | 70002, 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 Foundation | FQXi-RFP-CPW-2006, 735/18 |
Israel Science Foundation | 2064/19 |
PAZY Foundation |
Keywords
- Protective measurements
- Quantum measurements
- Quantum optics