PIRSA:09080021

Entanglement detection with bounded reference frames

Costa, F. (2009). Entanglement detection with bounded reference frames. Perimeter Institute. https://pirsa.org/09080021

Costa, Fabio. Entanglement detection with bounded reference frames. Perimeter Institute, Aug. 04, 2009, https://pirsa.org/09080021 

          @misc{ pirsa_PIRSA:09080021,
            doi = {10.48660/09080021},
            url = {https://pirsa.org/09080021},
            author = {Costa, Fabio},
            keywords = {Quantum Foundations},
            language = {en},
            title = {Entanglement detection with bounded reference frames},
            publisher = {Perimeter Institute},
            year = {2009},
            month = {aug},
            note = {PIRSA:09080021 see, \url{https://pirsa.org}}
          }

Fabio Costa

University of Queensland

Talk number
PIRSA:09080021
Collection
Talk Type
Subject
Abstract
Violation of local realism can be probed by theory–independent tests, such as Bell’s inequality experiments. There, a common assumption is the existence of perfect, classical, reference frames, which allow for the specification of measurement settings with arbitrary precision. However, if the reference frames are ``bounded'', only limited precision can be attained. We expect then that the finiteness of the reference frames limits the observability of genuine quantum features. Using spin coherent states as reference frames, we determined their minimal size necessary to violate Bell’s inequalities in entangled systems ranging from qubits to macroscopic dimensions. In the latter, the reference frame’s size must be quadratically larger than that of the system. Lacking such large reference frames, precludes quantum phenomena from appearing in everyday experience.