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arXiv 1301.7012quant-phgr-qchep-th
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唯拉格朗日量子理论

Lagrangian-Only Quantum Theory

K. B. Wharton

摘要:

尽管路径积分很重要,但相对而言,很少有人试图从拉格朗日量中寻找一个更现实的框架来支撑量子理论。虽然这样的实在论对于标准路径积分或量子场论是不可用的,但一个有希望的替代方法是只考虑拉格朗日密度总是为零的场历史。有了这种变化,似乎可以用等权重概率来取代振幅。本文演示了这种方法的原理证明,使用一个玩具拉格朗日对应于一个任意的自旋状态。在这个限制性的框架中,人们可以推导出玻恩规则及其适用范围。拉格朗日服从未来边界约束的事实也导致了第一个连续的,基于时空的,隐藏变量的贝尔不等式违反系统的描述。

英文摘要:

Despite the importance of the path integral, there have been relatively few attempts to look to the Lagrangian for a more realistic framework that might underlie quantum theory. While such realism is not available for the standard path integral or quantum field theory, a promising alternative is to only consider field histories for which the Lagrangian density is always zero. With this change, it appears possible to replace amplitudes with equally-weighted probabilities. This paper demonstrates a proof-of-principle for this approach, using a toy Lagrangian that corresponds to an arbitrary spin state. In this restricted framework one can derive both the Born rule and its limits of applicability. The fact that the Lagrangian obeys future boundary constraints also results in the first continuous, spacetime-based, hidden-variable description of a Bell-inequality-violating system.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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