Home Seminários Details - Ernesto F. Galvão: Dimension and coherence witnesses from SWAP tests

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Event 

Title:
Ernesto F. Galvão: Dimension and coherence witnesses from SWAP tests
When:
17.05.2019 11.00 h
Where:
Sala A5-01 - Niteroi
Category:
Seminários

Description

Seminário do grupo de Óptica e Informação Quântica

 

 

Speaker: Ernesto F. Galvão

 

Title: Dimension and coherence witnesses from SWAP tests

 

Abstract:

 

The SWAP test is a simple quantum circuit that projects onto the symmetric subspace of two quantum systems. When applied to two separable states, it results in a direct estimation of the two-state overlap Tr(rho sigma). Using many such tests, we can gather information about many pairwise overlaps of N states. I’ll show how this relational information can be used to witness quantum coherence, i.e. guarantee that the states are not diagonal in any single basis. I’ll also show how these tests can be used as a Hilbert space dimension witness. Finally, I’ll briefly describe how to implement these tests using linear optics.

Venue

Group:
Sala A5-01
Street:
Instituto de Física da UFF
ZIP:
24210-346
City:
Niteroi
State:
RJ
Country:
Country: br

Description

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