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Distinguishability theory and Gaussian Boson Sampling

Grant number: 21/03251-0
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): September 01, 2021
Effective date (End): October 31, 2024
Field of knowledge:Physical Sciences and Mathematics - Physics - General Physics
Principal researcher:Valery Shchesnovich
Grantee:Matheus Eiji Ohno Bezerra
Home Institution: Centro de Ciências Naturais e Humanas (CCNH). Universidade Federal do ABC (UFABC). Ministério da Educação (Brasil). Santo André , SP, Brazil


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)

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