Distinguishability theory and Gaussian Boson Sampling

• Grant number: 21/03251-0
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: September 01, 2021
• End date: October 28, 2025
• Field of knowledge: Physical Sciences and Mathematics - Physics - General Physics
• Principal Investigator: Valery Shchesnovich
• Grantee: Matheus Eiji Ohno Bezerra
• Host Institution: Centro de Ciências Naturais e Humanas (CCNH). Universidade Federal do ABC (UFABC). Ministério da Educação (Brasil). Santo André , SP, Brazil
• Associated scholarship(s): 22/13635-3 - Quantum multiparameter estimation method applied to noise squeezed states interferometry, BE.EP.DR

Abstract

The so-called Boson Sampling (BS) is a scheme that consists of sampling photons at the output of a linear network after undergoing scattering. Such a scheme is a strong candidate to achieve the expected quantum supremacy, however its experimental realization faces difficulties, among them the fact that it is necessary to have a very large number of indistinguishable single photons. In order to circumvent this problem, alternative proposals have been proposed, of which Gaussian Boson Sampling (GBS) has shown itself to be quite promising, particularly in the case where compressed states are used. The effects of distinguishability in such a scheme are not yet well understood and, therefore, the main objective of the project is to investigate how the distinction of states affects behavior of GBS. Two important sources of distinction are: I) the spectral profile of the generated states; II) mixing of the states. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

BEZERRA, M. E. O.; SHCHESNOVICH, V. S.. Families of bosonic suppression laws beyond the permutation symmetry principle. NEW JOURNAL OF PHYSICS, v. 25, n. 9, p. 14-pg., 2023-09-01. (21/03251-0)