这个例子太好了
【 在 Psychnp 的大作中提到: 】
: No, quantum physics does not disprove causality.
: On the contrary, our best working quantum theory to date, quantum field theory, quite properly respects causality both on the macroscopic and on the microscopic level. Acausal (faster-than-light, backwards-in-time) influences are explicitly and precisely canceled out in the theory. This, in fact, is one of the major motivations behind quantum field theory.
: Some confusion arises because of misunderstandings surrounding the obvious nonlocality of the quantum theory, in particular the nonlocality of quantum entanglement. Therefore, it is important to reiterate that although entanglement may be counterintuitive, “spooky” even, it does not imply the transmission of information, the transmission of energy or momentum or other influences. It is simply a nonlocal manifestation of conservation laws, but no acausal signaling is involved.
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FROM 14.150.198.*