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hep-ph2026
Expanding quantum Proca field
Bogdan Damski
We consider the Proca theory of a real massive vector field coupled to an external current. This theory allows for non-conservation of the charge associated with the external curre…
quant-ph2026
Expanding quantum magnetic field
Bogdan Damski
We develop the quantum theory of the causal formation of a long-range magnetic field generated by an external current that is instantaneously switched on and subsequently kept cons…
quant-ph2026
Product Weyl--Heisenberg covariant mutually unbiased bases and extremal non-stabilizerness
Bogdan S. Damski, Rafał Bistroń, Diego Ponterio +2
Discrete structures in product Hilbert spaces are investigated. For monopartite systems of size one relies on the Weyl--Heisenberg group , while in the case of composite…