Journal Club do Departamento de Física dos Materiais e Mecânica
Nesta semana o Prof. Gabriel Teixeira Landi, do Grupo Teórico de Materiais do DFMT, apresentará o artigo
Bell correlations in a Bose-Einstein condensate
Roman Schmied et al.
Characterizing many-body systems through the quantum correlations between their constituent particles is amajor goal of quantum physics. Although entanglement is routinely observed in many systems, we report here the detection of stronger correlationsBell correlationsbetween the spins of about 480 atoms in a Bose-Einstein condensate.We derive a Bell correlation witness from a many-particle Bell inequality involving only one- and two-body correlation functions. Our measurement on a spin-squeezed state exceeds the threshold for Bell correlations by 3.8 standard deviations. Our work shows that the strongest possible nonclassical correlations are experimentally accessible in many-body systems and that they can be revealed by collective measurements.
DOI: 10.1126/science.aad8665
Data: 21 de março de 2018 (quarta-feira)
Horário: às 12h10min
Local: Sala de Seminários José Roberto Leite - Edifício Alessandro Volta (bloco C)
