Witnesses of coherence and dimension from multiphoton indistinguishability tests
| العنوان: | Witnesses of coherence and dimension from multiphoton indistinguishability tests |
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| المؤلفون: | Nicolò Spagnolo, Gonzalo Carvacho, Daniel J. Brod, Taira Giordani, Francesco Hoch, Chiara Esposito, Fabio Sciarrino, Ernesto F. Galvão |
| المصدر: | PHYSICAL REVIEW RESEARCH Physical review research 3 (2021): 023031-1–023031-10. doi:10.1103/PhysRevResearch.3.023031 info:cnr-pdr/source/autori:Giordani T.; Esposito C.; Hoch F.; Carvacho G.; Brod D.J.; Galvao E.F.; Spagnolo N.; Sciarrino F./titolo:Witnesses of coherence and dimension from multiphoton indistinguishability tests/doi:10.1103%2FPhysRevResearch.3.023031/rivista:Physical review research/anno:2021/pagina_da:023031-1/pagina_a:023031-10/intervallo_pagine:023031-1–023031-10/volume:3 |
| بيانات النشر: | Optica Publishing Group, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Quantum Physics, Basis (linear algebra), Computer science, Measure (physics), FOS: Physical sciences, Observable, Coherence (statistics), Quantum channel, Quantum information processing, 01 natural sciences, Witness, 010305 fluids & plasmas, QUANTUM, ENTANGLEMENT, PHOTONS, STATES, quantum coherence, multiphoton indistinguishability, quantum interference, Dimension (vector space), Quantum cryptography, Quantum state, 0103 physical sciences, Pairwise comparison, Quantum Physics (quant-ph), 010306 general physics, Quantum, Algorithm, Quantum computer |
| الوصف: | Quantum coherence marks a deviation from classical physics, and has been studied as a resource for metrology and quantum computation. Finding reliable and effective methods for assessing its presence is then highly desirable. Coherence witnesses rely on measuring observables whose outcomes can guarantee that a state is not diagonal in a known reference basis. Here we experimentally measure a novel type of coherence witness that uses pairwise state comparisons to identify superpositions in a basis-independent way. Our experiment uses a single interferometric set-up to simultaneously measure the three pairwise overlaps among three single-photon states via Hong-Ou-Mandel tests. Besides coherence witnesses, we show the measurements also serve as a Hilbert-space dimension witness. Our results attest to the effectiveness of pooling many two-state comparison tests to ascertain various relational properties of a set of quantum states. 10 pages, 7 figures |
| DOI: | 10.1364/cleo_at.2021.jth3a.60 |
| DOI: | 10.1103/PhysRevResearch.3.023031 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f731cefc2fe8f3c8268962d60243c080 https://doi.org/10.1364/cleo_at.2021.jth3a.60 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....f731cefc2fe8f3c8268962d60243c080 |
| قاعدة البيانات: | OpenAIRE |
| DOI: | 10.1364/cleo_at.2021.jth3a.60 |
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