Editing Bell test (section)

===Memory loophole===
In most experiments, measurements are repeatedly made at the same two locations. A local hidden variable theory could exploit the memory of past measurement settings and outcomes in order to increase the violation of a Bell inequality. Moreover, physical parameters might be varying in time. It has been shown that, provided each new pair of measurements is done with a new random pair of measurement settings, that neither memory nor time inhomogeneity have a serious effect on the experiment.<ref>{{cite journal|title=Quantum nonlocality, Bell inequalities and the memory loophole| first1=Jonathan |last1=Barrett |first2=Daniel |last2=Collins|first3=Lucien|last3=Hardy |first4=Adrian|last4=Kent| first5=Sandu|last5=Popescu|journal=[[Physical Review A]] |volume=66 |issue=4|at=042111| year=2002|doi=10.1103/PhysRevA.66.042111| arxiv=quant-ph/0205016|bibcode=2002PhRvA..66d2111B|s2cid=6524446}}</ref><ref>{{cite book|chapter=Accardi contra Bell (cum mundi): The Impossible Coupling|first=Richard D.|last=Gill|pages=133–154|title=Mathematical Statistics and Applications: Festschrift for Constance van Eeden|editor=M. Moore|editor2=S. Froda|editor3=C. Léger|series=IMS Lecture Notes — Monograph Series|volume=42|date=2003|publisher= Institute of Mathematical Statistics|location=Beachwood, Ohio|arxiv=quant-ph/0110137}}</ref><ref name="Gill2002">{{cite book|chapter=Time, Finite Statistics, and Bell's Fifth Position|first=Richard D.|last=Gill|pages=179–206|title=Proceedings of the Conference Foundations of Probability and Physics - 2 : Växjö (Soland), Sweden, June 2-7, 2002 |volume=5|publisher=Växjö University Press|date=2002|arxiv=quant-ph/0301059 |bibcode = 2003quant.ph..1059G }}</ref>