A realist view of the canonical EPRB experiment based on quantum theory and its consequences

A Local Realist Account of the Weihs et al EPRB Experiment

Quantum mechanics stands in conflict with local realism only in its treatment of separated systems. A modification of quantum mechanics that changes the handling of separated systems is suggested that can reconcile quantum mechanics with local realism. An apparent obstacle to this program is the experimental evidence, but I argue that the experiments have been misinterpreted. By way of example, I describe a local realistic account of one important EPRB experiment that is claimed to demonstrate nonlocal entanglement. The local model can be calibrated into both quantum and classical domains via …

Grandma's local realistic theory for the Einstein-Podolsky-Rosen-Bohm experiment

A local realistic theory is presented for Mermin's special case of the EPRB experiment. The theory, which is readily extended to the general EPRB experiment, reproduces all the predictions of quantum theory. It also reveals that Bell, and also Hess and Philipp, had made an error in the mathematical formulation of Einstein's locality or no action at a distance principle.

Comment on "A local realist model for correlations of the singlet state'' (De Raedt et al., Eur. Phys. J. B 53: 139-142, 2006)

De Raedt et al. (Eur. Phys. J. B 53: 139-142, 2006) have claimed to provide a local realist model for correlations of the singlet state in the familiar Einstein-Podolsky-Rosen-Bohm (EPRB) experiment when time-coincidence is used to decide which detection events should count in the analysis, and furthermore that this suggests that it is possible to construct local realistic models that can reproduce the quantum mechanical expectation values. In this letter we show that these conclusions cannot be upheld since their model exploits the so-called coincidence-time loophole. When this is properly ta…

A Physical Perspective on Classical Cloning

The celebrated quantum no-cloning theorem states that an arbitrary quantum state cannot be cloned perfectly. This raises questions about cloning of classical states, which have also attracted attention. Here, we present a physical approach to the classical cloning process showing how cloning can be realised using Hamiltonians. After writing down a canonical transformation that clones classical states, we show how this can be implemented by Hamiltonian evolution. We then propose an experiment using the tools of nonlinear optics to realise the ideas presented here. Finally, to understand the clo…

具有框架真空相变的非紧致量子系统的算符框架几何

Operator-frame geometry of non-compact quantum systems with frame-vacuum phase transitions

研究非紧致玻色子量子系统在真空不稳定时传统量子几何定义不明确的问题，通过正则算符框架层面开发公式，获得算符空间量子几何张量，展示其在相变中解析性并给出相图，还引入物理设置使QGT在不同区域平滑演化。

量子引力中幺正性的实在论诠释

A Realist Interpretation of Unitarity in Quantum Gravity

本文基于导航波理论，在 Ashtekhar 表述的 Wheeler-DeWitt 方程中通过确定构型定义全局时间，导出含时薛定谔方程和守恒流密度，使非归一化 Kodama 态自然分解，从而为量子引力中的幺正性提供一种实在论诠释。