Detalhes do Documento

Descrição

Made available in DSpace on 2020-12-12T02:11:42Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-12-01

Comisión Nacional de Investigación Científica y Tecnológica

Fundación Cellex

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

John Templeton Foundation

Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Ministerio de Economía y Competitividad

Agenzia Regionale del Lazio per i Trapianti e le Patologie Connesse

The intrinsic random nature of quantum physics offers novel tools for the generation of random numbers, a central challenge for a plethora of fields. Bell non-local correlations obtained by measurements on entangled states allow for the generation of bit strings whose randomness is guaranteed in a device-independent manner, i.e. without assumptions on the measurement and state-generation devices. Here, we generate this strong form of certified randomness on a new platform: the so-called instrumental scenario, which is central to the field of causal inference. First, we theoretically show that certified random bits, private against general quantum adversaries, can be extracted exploiting device-independent quantum instrumental-inequality violations. Then, we experimentally implement the corresponding randomness-generation protocol using entangled photons and active feed-forward of information. Moreover, we show that, for low levels of noise, our protocol offers an advantage over the simplest Bell-nonlocality protocol based on the Clauser-Horn-Shimony-Holt inequality.

Dipartimento di Fisica Sapienza Università di Roma, Piazzale Aldo Moro 5

International Center of Theoretical Physics - South American Institute for Fundamental Research Instituto de Física Teórica - UNESP, R. Dr. Bento T. Ferraz 271

Instituto de Física Universidade Federal do Rio de Janeiro, Caixa Postal 68528

ICFO - Institut de Ciencies Fotoniques The Barcelona Institute of Science and Technology

International Institute of Physics Federal University of Rio Grande do Norte, P. O. Box 1613

School of Science and Technology Federal University of Rio Grande do Norte

International Center of Theoretical Physics - South American Institute for Fundamental Research Instituto de Física Teórica - UNESP, R. Dr. Bento T. Ferraz 271

FAPESP: 2018/04208-9

John Templeton Foundation: 61084

FAPERJ: E-26/202.701/2018

CAPES: PROCAD2013

Ministerio de Economía y Competitividad: SEV-2015-0522

Agenzia Regionale del Lazio per i Trapianti e le Patologie Connesse: SINFONIA