Dynamics of Open Quantum Systems
... subtleties typically also emerge with other approaches/methods to quantum dissipation; thus it is beneficial to dwell on these in some detail. Important features of the QLE are: • The QLE (2) is an operator equation that acts in the full Hilbert space of system and bath. The coupling between system a ...
... subtleties typically also emerge with other approaches/methods to quantum dissipation; thus it is beneficial to dwell on these in some detail. Important features of the QLE are: • The QLE (2) is an operator equation that acts in the full Hilbert space of system and bath. The coupling between system a ...
Quantum networks with trapped ions
... not well defined and may not even have a direct link at the time of measurement. Entangled qubits thus possess an extra connection between memory elements that is absent with classical bits. With clever use of such entangled qubits, superfast computation and secure communication can be achieved with ...
... not well defined and may not even have a direct link at the time of measurement. Entangled qubits thus possess an extra connection between memory elements that is absent with classical bits. With clever use of such entangled qubits, superfast computation and secure communication can be achieved with ...
Quantum Symmetric States - UCLA Department of Mathematics
... To investigate QSS(A) as a compact, convex subset of S(A), to characterize its extreme points and to study certain convex subsets: • the tracial quantum symmetric states TQSS(A) = QSS(A) ∩ T S(A) • the central quantum symmetric states ZQSS(A) = {ψ ∈ QSS(A) | Tψ ⊆ Z(Mψ )} • the tracial central quantu ...
... To investigate QSS(A) as a compact, convex subset of S(A), to characterize its extreme points and to study certain convex subsets: • the tracial quantum symmetric states TQSS(A) = QSS(A) ∩ T S(A) • the central quantum symmetric states ZQSS(A) = {ψ ∈ QSS(A) | Tψ ⊆ Z(Mψ )} • the tracial central quantu ...
Dynamics of exciton dissociation in donor- acceptor polymer heterojunctions
... As we have pointed out above, the D-A polymer heterojunction is constructed by two coupled polymer chains which are placed face to face. We set different values to the on-site energies of the two chains. Figure 1 shows the schematic diagram of the energy spectrum of the D-A polymer heterojunction, w ...
... As we have pointed out above, the D-A polymer heterojunction is constructed by two coupled polymer chains which are placed face to face. We set different values to the on-site energies of the two chains. Figure 1 shows the schematic diagram of the energy spectrum of the D-A polymer heterojunction, w ...
Renormalization
In quantum field theory, the statistical mechanics of fields, and the theory of self-similar geometric structures, renormalization is any of a collection of techniques used to treat infinities arising in calculated quantities.Renormalization specifies relationships between parameters in the theory when the parameters describing large distance scales differ from the parameters describing small distances. Physically, the pileup of contributions from an infinity of scales involved in a problem may then result in infinities. When describing space and time as a continuum, certain statistical and quantum mechanical constructions are ill defined. To define them, this continuum limit, the removal of the ""construction scaffolding"" of lattices at various scales, has to be taken carefully, as detailed below.Renormalization was first developed in quantum electrodynamics (QED) to make sense of infinite integrals in perturbation theory. Initially viewed as a suspect provisional procedure even by some of its originators, renormalization eventually was embraced as an important and self-consistent actual mechanism of scale physics in several fields of physics and mathematics. Today, the point of view has shifted: on the basis of the breakthrough renormalization group insights of Kenneth Wilson, the focus is on variation of physical quantities across contiguous scales, while distant scales are related to each other through ""effective"" descriptions. All scales are linked in a broadly systematic way, and the actual physics pertinent to each is extracted with the suitable specific computational techniques appropriate for each.