The origin of non-classicality in physical systems and its connection to distinctly quantum features such as entanglement and coherence is a central question in quantum physics. This work analyses this question theoretically and experimentally, linking quantitatively non-classicality with quantum coherence. On the theoretical front, we show when the coherence of an observable is linearly related to the degree of violation of the Kolmogorov condition, which quantifies the deviation from any classical (non-invasive) explanation of the multi-time statistics. Experimentally, we probe this connection between coherence and non-classicality in a time-multiplexed optical quantum walk. We demonstrate exquisite control of quantum coherence of the walker by varying the degree of coherent superposition effected by the coin, and we show a concomitant variation in the degree of non-classicality of the walker statistics, which can be accessed directly by virtue of the unprecedented control on the measurement-induced effects obtained via fast programmable electro-optic modulators.

Experimental control of the degree of non-classicality via quantum coherence / A. Smirne, T. Nitsche, D. Egloff, S. Barkhofen, S. De, I. Dhand, C. Silberhorn, S. F Huelga, M. Bodo Plenio. - In: QUANTUM SCIENCE AND TECHNOLOGY. - ISSN 2058-9565. - 5:4(2020 Jul 28), pp. 04LT01.1-04LT01.13.

Experimental control of the degree of non-classicality via quantum coherence

A. Smirne
Co-primo
;
2020

Abstract

The origin of non-classicality in physical systems and its connection to distinctly quantum features such as entanglement and coherence is a central question in quantum physics. This work analyses this question theoretically and experimentally, linking quantitatively non-classicality with quantum coherence. On the theoretical front, we show when the coherence of an observable is linearly related to the degree of violation of the Kolmogorov condition, which quantifies the deviation from any classical (non-invasive) explanation of the multi-time statistics. Experimentally, we probe this connection between coherence and non-classicality in a time-multiplexed optical quantum walk. We demonstrate exquisite control of quantum coherence of the walker by varying the degree of coherent superposition effected by the coin, and we show a concomitant variation in the degree of non-classicality of the walker statistics, which can be accessed directly by virtue of the unprecedented control on the measurement-induced effects obtained via fast programmable electro-optic modulators.
Settore FIS/02 - Fisica Teorica, Modelli e Metodi Matematici
Settore FIS/01 - Fisica Sperimentale
Article (author)
File in questo prodotto:
File Dimensione Formato  
coherence-non-classicality-resub.pdf

embargo fino al 28/07/2021

Tipologia: Post-print, accepted manuscript ecc. (versione accettata dall'editore)
Dimensione 5.47 MB
Formato Adobe PDF
5.47 MB Adobe PDF Visualizza/Apri
Smirne_2020_Quantum_Sci._Technol._5_04LT01.pdf

accesso riservato

Tipologia: Publisher's version/PDF
Dimensione 2.94 MB
Formato Adobe PDF
2.94 MB Adobe PDF   Visualizza/Apri   Richiedi una copia
coherence-non-classicality-experiment.pdf

accesso aperto

Tipologia: Pre-print (manoscritto inviato all'editore)
Dimensione 5.42 MB
Formato Adobe PDF
5.42 MB Adobe PDF Visualizza/Apri
Pubblicazioni consigliate

Caricamento pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/754572
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 5
  • ???jsp.display-item.citation.isi??? 5
social impact