Bell’s Test, Entanglement and the Strict Predictions of QFT

Yong Du, Xiao-Gang He, Chia-Wei Liu +1 more

Abstract We present our new findings on how various fundamental interactions decisively shape quantum entanglement and the Bell measure within and beyond the quantum field theory (QFT). In QFT, parity symmetry plays a key role in determining entanglement. Parity-conserving interactions produce maximally entangled bipartite systems, while maximally parity-violating interactions result in disentangled bipartite systems, placing the Bell measure on the boundary between classical and quantum theories. By examining the relation between quantum entanglement and Bell measure, we find that clean signals for interactions beyond QFT may be obtained. We propose methods to test these potential signals. Furthermore, we highlight the previously overlooked influence of magnetic fields within detectors, which radically alters predictions for quantum entanglement and Bell nonlocality. This environmental effect induces spurious P and charge-parity (CP) violations, which has to be carefully accounted for to reveal the true P, CP, and Bell nonlocality effects.

G. Fano, S. M. Blinder

Biao Wu

Wenjamin Rosenfeld, Daniel Burchardt, Robert Garthoff +4 more

An experimental test of Bell's inequality allows ruling out any local-realistic description of nature by measuring correlations between distant systems. While such tests are conceptually simple, there are strict requirements concerning the detection efficiency of the involved measurements, as well as the enforcement of spacelike separation between the measurement events. Only very recently could both loopholes be closed simultaneously. Here we present a statistically significant, event-ready Bell test based on combining heralded entanglement of atoms separated by 398 m with fast and efficient measurements of the atomic spin states closing essential loopholes. We obtain a violation with S=2.221±0.033 (compared to the maximal value of 2 achievable with models based on local hidden variables) which allows us to refute the hypothesis of local realism with a significance level P<2.57×10^{-9}.

琼金 黄

Prediction P1 proposes a measurable settlement delay effect in Bell experiments. Within the Life Panorama framework, quantum measurement is a finite-time dynamical process called two-phase settlement, which has an intrinsic characteristic time scale τ_S (attosecond-to-femtosecond range). When the measurement time difference δt between the two wings of a Bell experiment is comparable to τ_S, the CHSH correlation parameter S will exhibit a small but statistically significant attenuation relative to the standard quantum mechanical prediction. Standard quantum mechanics predicts no such attenuation. This paper provides the precise theoretical statement, experimental design, statistical criteria, and strict falsification condition for testing the effect. settlement delay effect, Bell experiment, CHSH inequality, quantum measurement, Life Panorama, consciousness-spacetime unification, nonlocality, attosecond physics

Jeffrey H. Boyd