相互作用哈密顿量的量子模型及其悖论
Quantum models of interaction Hamiltonian and their paradoxes
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中文总结 AI 辅助
本文提出尊重光锥的微观量子模型以重现两体哈密顿量,定量分析媒介残余效应(如稳态修饰和退相干),并展示其如何解决超光速通信等悖论。
中文摘要 AI 辅助
在量子物理学中,用多体哈密顿量来模拟远程系统之间的相互作用是司空见惯的。将这种超距作用的描述按字面意思理解,会导致各种与超光速通信相关的悖论,以及局部能量核算中的明显不一致。它还忽略了残余效应,例如远程系统与实现相互作用的媒介之间的纠缠,或者当远程系统经历局部演化时产生的退相干。我们研究了简单的微观量子模型,这些模型在设计上尊重光锥,并重现两体哈密顿量。对于这些模型,我们定量分析了微观媒介对远程系统的残余效应,包括稳态的修饰,以及在快速局部控制下存在的退相干。我们展示了这些模型如何解决这些悖论。
英文摘要
In quantum physics it is commonplace to model the interaction of remote systems with a many-body Hamiltonian. Taking such an action-at-a-distance description {\it à la lettre} leads to various paradoxes related to faster-than-light communication and apparent inconsistencies in local energy accounting. It also neglects residual effects, such as entanglement between the remote systems and the mediator that implements the interaction, or the decoherence that arises when the remote systems undergo local evolution. We study simple microscopic quantum models that respect the light cone by design and reproduce two-body Hamiltonians. For these models we quantitatively analyze the residual effects of the microscopic mediator on the remote systems, including dressing of stationary states, and decoherence in the presence of fast local control. We show how the models resolve the paradoxes.
发表机构
- University of Geneva(日内瓦大学)
- Constructor University(Constructor大学)
- Université libre de Bruxelles (ULB)(布鲁塞尔自由大学)
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