An alternative quantum theory for single particles and a proposed experimental test

Seth Lloyd, Lorenzo Maccone, Raúl García−Patrón +8 more

Closed timelike curves (CTCs) are trajectories in spacetime that effectively travel backwards in time: a test particle following a CTC can interact with its former self in the past. A widely accepted quantum theory of CTCs was proposed by Deutsch. Here we analyze an alternative quantum formulation of CTCs based on teleportation and postselection, and show that it is inequivalent to Deutsch's. The predictions or retrodictions of our theory can be simulated experimentally: we report the results of an experiment illustrating how in our particular theory the "grandfather paradox" is resolved.

Charles Paul Enz

Charles Paul Enz

Hitoshi Inamori

It is generally accepted that Everett's theory of quantum mechanics cannot be experimentally tested as such experiment would involve operations on the observer which are beyond our current technology. We propose an alternative to test Everett's theory which does not involve any operation on the observer. If we assume that the observer is of finite dimension, it is shown that Everett's theory leads to distinctive properties for the system being observed, and that such difference can be experimentally tested.

Jingyuan Guo

The size-ether dual medium model proposes an alternative explanation for the four fundamental interactions, the nature of light, and quantum randomness within the framework of classical mechanics, yet its core predictions remain to be experimentally verified. This paper designs four progressive crucial experiments: (1) an ultrasonic polarization experiment to verify that longitudinal waves can exhibit polarization characteristics; (2) a single-atom serial decay experiment with a strict single-chamber, single-trap, single-particle design to test whether decay is a collective emergent effect; (3) a Venus orbital gravitational constant measurement experiment to adjudicate between the medium gravity paradigm and the spacetime curvature paradigm; (4) a radio wave dual-mirror beam splitting experiment using mercury-plated mirrors to directly split the wavefront and test the divisibility of photons. The four experiments form a complete verification system from the dimensions of optics, nuclear physics, gravitation, and quantum properties, and the results can directly determine the rationality of the classical medium unified theory. (本文在英文正文后附有完整中文版,内容与结构完全一致。)

HERBERT WALTHER