Zobrazeno 1 - 10
of 123
pro vyhledávání: '"Damski, Bogdan"'
Autor:
Damski, Bogdan
The Proca theory of the real massive vector field admits non-equilibrium solutions, where the asymptotic dynamics of the electric field is dominated by the periodically oscillating Coulomb component. We discuss how such field configurations are seen
Externí odkaz:
http://arxiv.org/abs/2402.17789
Autor:
Damski, Bogdan
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 construct such states so as to ensure that the long distance structure
Externí odkaz:
http://arxiv.org/abs/2305.13908
Autor:
Damski, Bogdan
Publikováno v:
Phys. Rev. D 107, 045016 (2023)
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 commutator of the scalar field operator and the electric field operator is give
Externí odkaz:
http://arxiv.org/abs/2301.04125
Autor:
Damski, Bogdan
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. Accordingly, there are charged states in which the expectation value of
Externí odkaz:
http://arxiv.org/abs/2212.01951
Autor:
Łącki, Mateusz, Damski, Bogdan
Publikováno v:
Phys. Rev. B 104, 155113 (2021)
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 variance of the on-site atom number occupation, computed with respect
Externí odkaz:
http://arxiv.org/abs/2107.06403
Autor:
Damski, Bogdan
Publikováno v:
Phys. Rev. D 104, 085003 (2021)
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 operator receives at least one gauge-fixing-originated contribution, whose
Externí odkaz:
http://arxiv.org/abs/2105.01072
Autor:
Białończyk, Michał, Damski, Bogdan
Publikováno v:
Phys. Rev. B 102, 134302 (2020)
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 another. We assume that two such quenches are performed in opposite directio
Externí odkaz:
http://arxiv.org/abs/2007.04991
Autor:
Białończyk, Michał, Damski, Bogdan
Publikováno v:
J. Stat. Mech. (2020) 013108
We show that the symmetry-breaking gap of the quantum Ising model in the transverse field can be extracted from free evolution of the longitudinal magnetization taking place after a gradual quench of the magnetic field. We perform for this purpose nu
Externí odkaz:
http://arxiv.org/abs/1909.12853
Autor:
Damski, Bogdan
Publikováno v:
Nucl. Phys. B 949, 114828 (2019)
We study angular momentum of the electron stored in its electric and magnetic fields. We use for this purpose quantum electrodynamics in the covariant gauge. We show that a finite one-loop result for such angular momentum can be obtained without invo
Externí odkaz:
http://arxiv.org/abs/1908.06061