Nonlocal correlations are generic in infinite-dimensional bipartite systems

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningfagfællebedømt

It was recently shown that nonseparable density operators on the Hilbert space H1⊗H2 are trace norm dense if either factor space has infinite dimension. We show here that nonlocal states, i.e., states whose correlations cannot be reproduced by any local hidden variable model, are also dense. Our constructions distinguish between the case dim H1 = dim H2 = ∞, where we show that states violating the Clauser-Horne-Shimony-Holt (CHSH) inequality are dense, and the case dim H1<dimH2=∞, where we identify open neighborhoods of nonseparable states that do not violate the CHSH inequality but show that states with a subtler form of nonlocality (often called "hidden" nonlocality) remain dense.

OriginalsprogEngelsk
Artikelnummer042101
TidsskriftPhysical Review A - Atomic, Molecular, and Optical Physics
Vol/bind61
Udgave nummer4
Sider (fra-til)421011-421017
Antal sider7
ISSN1050-2947
StatusUdgivet - apr. 2000

ID: 370731364