Question

Sandu Popescu (“poh-PESS-koo”) and Daniel Rohrlich (“roar-lick”) showed that theories in which relativistic causality and this property are axioms form a superset of quantum mechanics. Standard protocols in quantum (10[1])information theory use operations that [emphasize] do not have this property along with classical communication. Realist theories that [emphasize] do not have this property are violated by the three-particle (-5[1])GHZ state. Theories with this property violate the upper bound of “two square root two” on the expression: (-5[2])“E (-5[1])of A, B” plus “E of A, B-prime” (10[1])plus “E of A-prime, (-5[1])B” minus (-5[1])“E of A-prime, B-prime;” that expression is the CHSH inequality. Because quantum mechanics is causal and has this property, (-5[1])Einstein, Podolsky, (-5[1])and (10[1])Rosen argued that (-5[1])the theory was incomplete. (-5[2])Hidden (-5[1])variable (-5[1])theories must (-5[1])have this property to be able to predict quantum results, as argued by John Bell. For 10 points, name this property of being influenced (-5[1])by distant systems. (10[1])■END■ (10[7]0[4])

ANSWER: nonlocality [prompt on entangled or entanglement or correlated or correlation; prompt on descriptions of having hidden variables until “Hidden variable theories” is read] (The second sentence refers to LOCC protocols.)
<Physics>
= Average correct buzz position

Summary

2023 ACF Nationals04/22/2023Y2152%0%71%128.09

Buzzes

PlayerTeamOpponentBuzz PositionValue
Nathan SheffieldMIT ACornell B2610
Geoffrey ChenCornell AMaryland A55-5
Daniel MaYale AWUSTL A73-5
Adam FineChicago ADuke A73-5
Karan GurazadaTexas AToronto A74-5
Anson BernsBrown AGeorgia Tech A8210
Jim FanNorth Carolina AIndiana A86-5
Eric WolfsbergStanford AOhio State A88-5
Vivek SasseChicago BFlorida A107-5
Max BrodskyIllinois AGeorgia Tech B109-5
Forrest WeintraubColumbia BJohns Hopkins A11010
Matthew SiffYale BMcGill A113-5
David BassVirginia ASouth Carolina A117-5
Ameya PhadnisRutgers BPurdue A117-5
Shardul RaoMinnesota AUC Berkeley A118-5
Geoffrey WuColumbia ANorthwestern A119-5
Tanis NielsenClaremont AWUSTL B121-5
Andrew HannaVanderbilt AFlorida B145-5
Max ChemtovMcGill AYale B14810
Michael MaysImperial AHouston A14910
Leo LawFlorida AChicago B1490
Isak JatoiSouth Carolina AVirginia A14910
Mateo Javier AcostaFlorida BVanderbilt A14910
Rohan ShelkeUC Berkeley BNYU A1490
Andrew SalijNorthwestern AColumbia A14910
Alex AkridgeIndiana ANorth Carolina A14910
Matthew LehmannWUSTL AYale A1490
Halle FriedmanNYU AUC Berkeley B1490
Isaac MammelMaryland ACornell A14910
Ted GanPenn State ARutgers A14910