Entangled history theory is based on the framework of consistent histories theory, which is considered to be a way to reformulate quantum mechanics without the postulation of collapsing of states. Since it was proposed in 2015, the entangled history was verified experimentally with
3 time nodes GHZ-like entangled histories in 2016. Here we extend previous results of entangled histories to arbitrary number of time nodes. For even number time nodes, we define a Bell-type inequality to distinguish quantum entangled histories and the classical histories and prove the inequality for arbitrary even time nodes histories. For odd time nodes cases, we propose a GHZ type experiment and define a function to distinguish quantum entangled and classical histories. We prove a minimal formula for the function of classical histories, which is larger than the function outcome of entangled histories.
In Phys. Rev. A 101 (2020) 022117 it was argued that Bell inequalities are based on classical, not quantum, physics, and hence their violation in experiments provides no support for the claimed existence of peculiar nonlocal and superluminal influences in the real (quantum) world. Following a brief review of some aspects of the Consistent Histories approach used in that work, the objections raised in Lambare's Comment, arXiv:2102.075243v3, are examined and shown to rest on serious misunderstandings, and as a result fail to identify any errors in, or problems with, the work being criticized.
This paper examines the history from EPR argument to Bell’s inequality and the influence of Bell’s inequality on the frontier exploration of quantum mechanics. It is found that Bell’s inequality has some hidden assumptions different from EPR argument: Following Schrodinger's assumption that the measurement process of EPR experiment undergos time, Karl Hess regards time as an implicit variable of time series, and Joy Christian obtains a local implicit variable inequality different from Bell's inequality. They extended the relativistic space-time geometric analysis method to the localized geometric morphological analysis of quantum states, and considered that the Bell’s inequality reasoning did not meet the requirements of the completeness of EPR argument. Quantum statistics given by identical particles is different from classical statistics. Innovative ensemble interpretation can also solve Bell's inequality and give a demonstration of quantum non-locality. The main research progress of quantum gravity is great, but there are many divergences. According to Einstein's local realism, the new explanation and expression of quantum mechanics may open up new ideas for the study of quantum gravity.