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quant-ph2026
What is electric charge?: Charge as a local observable in relativistic quantum field theory
Hideyasu Yamashita
It is rather surprising that modern quantum physics does not appear to have provided any clear answer to the simple question ``what is electric charge?''. Even when the total charg…
quant-ph2026
A skepticism on the concept of quantum state related to quantum field theory on curved spacetime
Hideyasu Yamashita
Some skeptical arguments on the physical reality of quantum states are given. First, I argue that the algebraic formalism of quantum field theory in curved spacetime (algebraic QFT…