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quant-ph2025
Probability Density in Relativistic Quantum Mechanics
Taeseung Choi, Yeong Deok Han
In the realm of relativistic quantum mechanics, we address a fundamental question: Which one, between the Dirac or the Foldy-Wouthuysen density, accurately provide a probability de…
quant-ph2019
Singularity of relativistic vortex beam and proper relativistic observables
Yeong Deok Han, Taeseung Choi, Sam Young Cho
We have studied the phase singularity of the relativistic vortex beams for the two sets of relativistic operators. One includes the new spin and orbital angular momentum (OAM) oper…
quant-ph2012
Limits on Quantum Probability Rule by no-Signaling Principle
Yeong Deok Han, Taeseung Choi
We have studied the possibility of post-quantum theories more nonlocal than the (standard) quantum theory using the modification of the quantum probability rule under the no-signal…