Zobrazeno 1 - 10
of 94
pro vyhledávání: '"K. Lendi"'
Autor:
K. Lendi, A.J. van Wonderen
Publikováno v:
Journal of Physics A: Mathematical and Theoretical. 40:279-288
Two mutually noninteracting qubits with identical modest coupling to one and the same reservoir are considered. For a given Hamiltonian and uncorrelated initial state, the mathematically rigorous Davies theory of the weak-coupling and van Hove limit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ccd726c65ba8e6b7ee325e30ea6deb2c
https://doi.org/10.1088/1751-8113/40/2/007
https://doi.org/10.1088/1751-8113/40/2/007
Autor:
K. Lendi, A.J. van Wonderen
Publikováno v:
Journal of Physics A: Mathematical and General. 39:14511-14528
Starting from a prescribed Hamiltonian, we construct a non-Markovian evolution equation for a non-relativistic quantum system that exchanges energy with a large reservoir. In order to create sufficient mathematical freedom, the density operator is re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::35cfa749b0c03594feb9c2c0c2ac52c8
https://doi.org/10.1088/0305-4470/39/46/018
https://doi.org/10.1088/0305-4470/39/46/018
Autor:
K. Lendi
Publikováno v:
Journal of Statistical Physics. 99:1037-1043
Functionals representing dynamical invariants under unitary quantum dynamics of open systems are used to derive Onsager coefficients for entropy production in irreversible processes if the nonunitary time evolution is determined by quantum dynamical
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4d1a850333905e929c51a4e9970facd0
https://doi.org/10.1023/a:1018612000264
https://doi.org/10.1023/a:1018612000264
Autor:
K. Lendi, A.J. van Wonderen
Publikováno v:
Journal of Physics. A, Mathematical and General, 33, 5757-5762. IOP Publishing Ltd.
Starting from the Schrodinger equation for a system and a reservoir, we construct a quantum dynamical map that describes reduced dynamics. We work with an arbitrary initial state for the system and reservoir, and thus refrain from performing any fact
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4304f909f312b2dbe38d3d72a33e8434
https://doi.org/10.1088/0305-4470/33/32/311
https://doi.org/10.1088/0305-4470/33/32/311
Autor:
K. Lendi, A.J. van Wonderen
Publikováno v:
Journal of Statistical Physics. 100:633-658
A Markovian master equation with time-dependent generator is constructed that respects basic constraints of quantum mechanics, in particular the von Neumann conditions. For the case of a two-level system, Bloch equations with time-dependent parameter
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0cd9c7b3d5fec44901aedc5cd6d40c88
https://doi.org/10.1023/a:1018671424739
https://doi.org/10.1023/a:1018671424739
Publikováno v:
Journal of Physics A: Mathematical and General. 31:3395-3416
On the basis of a representation in terms of photon-number states we derive an analytically solvable set of ordinary differential equations for the matrix elements of the density operator belonging to the Jaynes-Cummings model. We allow for atomic de
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9c44e241fbb136e7d2963ef7ad9b69d8
https://doi.org/10.1088/0305-4470/31/15/006
https://doi.org/10.1088/0305-4470/31/15/006
Publikováno v:
Journal of Statistical Physics. 92:1115-1135
The fundamental concept of relative entropy is extended to a functional that is regular-valued also on arbitrary pairs of nonfaithful states of open quantum systems. This regularized version preserves almost all important properties of ordinary relat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b4db2ec3b20c4f1374a387d79eb96371
https://doi.org/10.1023/a:1023004929346
https://doi.org/10.1023/a:1023004929346
Autor:
K. Lendi, A.J. van Wonderen
Publikováno v:
Journal of Physics A: Mathematical and General. 30:4439-4445
The standard representation of angular momentum on Bargmann's Hilbert space of analytic functions is extended such that domains of operators include non-analytic functions, which are square integrable. Generalized eigenfunctions of angular momentum a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::36701e29bd94cdd05d73005e5b5b2443
https://doi.org/10.1088/0305-4470/30/12/028
https://doi.org/10.1088/0305-4470/30/12/028
Autor:
A. J. van Wonderen, K. Lendi
Publikováno v:
Journal of Statistical Physics. 80:273-305
Adopting the standard mathematical framework for describing reduced dynamics, we derive two formal identities for the density operator of an open quantum system. Each of these is equivalent to the old Nakajima-Zwanzig equation. The first identity is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::37a3212106d15b9567ce1ac542f1301b
https://doi.org/10.1007/bf02178360
https://doi.org/10.1007/bf02178360
Autor:
K Lendi
Publikováno v:
Journal of Physics A: Mathematical and General. 27:609-630
Various equivalent representations of dynamical invariants (or constants of motion) are derived for N-level systems in mixed states with particular emphasis on so-called coherence vector invariants. They appear as certain homogeneous forms in the rea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::66d193fa14cd1dd360b6547276384f93
https://doi.org/10.1088/0305-4470/27/3/007
https://doi.org/10.1088/0305-4470/27/3/007