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47 papers
Non-equilibrium dynamics of dipole-charged fields in the Proca theory
Bogdan Damski
We discuss the dynamics of field configurations encoded in the certain class of electric (magnetic) dipole-charged states in the Proca theory of the real massive vector field. We c…
Electric field-based quantization of the gauge invariant Proca theory
Bogdan Damski
We consider the gauge invariant version of the Proca theory, where besides the real vector field there is also the real scalar field. We quantize the theory such that the commutato…
Periodic charge oscillations in the Proca theory
Bogdan Damski
We consider the Proca theory of the real massive vector field. There is a locally conserved 4-current operator in such a theory, which one may use to define the charge operator. Ac…
Evidence from on-site atom number fluctuations for a quantum Berezinskii-Kosterlitz-Thouless transition in the one-dimensional Bose-Hubbard model
Mateusz Łącki, Bogdan Damski
We study the one-dimensional Bose-Hubbard model describing the superfluid-Mott insulator quantum phase transition of cold atoms in optical lattices. We show that derivatives of the…
Impact of gauge fixing on angular momentum operators of the covariantly quantized electromagnetic field
Bogdan Damski
Covariant quantization of the electromagnetic field imposes the so-called gauge-fixing modification on the Lagrangian density. As a result of that, the total angular momentum opera…
Locating quantum critical points with Kibble-Zurek quenches
Michał Białończyk, Bogdan Damski
We describe a scheme for finding quantum critical points based on studies of a non-equilibrium susceptibility during finite-rate quenches taking the system from one phase to anothe…