Zobrazeno 1 - 10
of 72
pro vyhledávání: '"Mielnik, Bogdan"'
Autor:
Mielnik, Bogdan, Fuentes, Jesús
In studies of quantum squeezing, the emphasis is typically placed more on specific squeezed states and their evolution rather than on the dynamical operations that could simultaneously squeeze a broader range of quantum states, regardless of their in
Externí odkaz:
http://arxiv.org/abs/2406.06529
Autor:
Mielnik, Bogdan, Fuentes, Jesús
We look for new steps on the dynamical operations that may squeeze simultaneously some families of quantum states, independently of their initial shape, induced by softly acting external fields which might produce the squeezing of the canonical obser
Externí odkaz:
http://arxiv.org/abs/1704.05840
Autor:
Mielnik, Bogdan
We discuss an extremely simple effect of 'shadowing' where the very existence of the measuring apparatus deforms the evolution of quantum states even if the measurement is never preformed. In spite of strange intuitive aspects, it might be related to
Externí odkaz:
http://arxiv.org/abs/1606.06317
Autor:
Mielnik, Bogdan
A class of unitary operations generated by idealized, semiclassical fields is studied. The operations implemented by sharp potential kicks are revisited and the possibility of performing them by softly varying external fields is examined. The possibi
Externí odkaz:
http://arxiv.org/abs/1305.3664
Autor:
Mielnik, Bogdan
Our knowledge and ignorance concerning the geometry of quantum states are discussed.
Comment: 4 Figures
Comment: 4 Figures
Externí odkaz:
http://arxiv.org/abs/1202.2164
Autor:
Mielnik, Bogdan, Torres-Vega, Gabino
Publikováno v:
Concepts of Physics 2, 81 (2005)
Contrary to the conviction expressed by J. Kijowski [Phys. Rev. A 59, 897 (1999)] and shared in some other papers, the reasons to look for the 'time operator' in the context of the standard quantum doctrine of orthogonal projectors and self-adjoint o
Externí odkaz:
http://arxiv.org/abs/1112.4198
Autor:
Mielnik, Bogdan, Ramírez, Alejandra
We examine the behaviour of charged particles in homogeneous, constant and/or oscillating magnetic fields in the non-relativistic approximation. A special role of the geometric center of the particle trajectory is elucidated. In quantum case it becom
Externí odkaz:
http://arxiv.org/abs/1006.1944
Publikováno v:
J.Phys.A35:4279-4291,2002
Irreducible second-order Darboux transformations are applied to the periodic Schrodinger's operators. It is shown that for the pairs of factorization energies inside of the same forbidden band they can create new non-singular potentials with periodic
Externí odkaz:
http://arxiv.org/abs/quant-ph/0303051
Publikováno v:
Phys.Lett.A294:168-174,2002
For a class of Schrodinger Hamiltonians the supersymmetry transformations can degenerate to simple coordinate displacements. We examine this phenomenon and show that it distinguishes the Weierstrass potentials including the one-soliton wells and peri
Externí odkaz:
http://arxiv.org/abs/quant-ph/0302204
Autor:
Mielnik, Bogdan
Contrary to the opinion of J. Polchinski [Phys.Rev.Lett. {\bf 66}, 397-400 (1991)], the phenomenon of superluminal messages in nonlinear versions of quantum mechanics is not a specific difficulty in a class of theories formulated by S. Weinberg [Ann.
Externí odkaz:
http://arxiv.org/abs/quant-ph/0012041