Results 71 to 80 of about 345,713 (293)

Anomalies, boundaries and the in-in formalism

, 2012
In the context of quantum field theory, an anomaly exists when a theory has a classical symmetry which is not a symmetry of the quantum theory. This short exposition aims at introducing a new point of view, which is that the proper setting for anomaly ...
Moss, Ian G.
core   +1 more source

Boundary Entropy Can Increase Under Bulk RG Flow [PDF]

, 2007
The boundary entropy log(g) of a critical one-dimensional quantum system (or two-dimensional conformal field theory) is known to decrease under renormalization group (RG) flow of the boundary theory.
Affleck, Affleck, Affleck, Affleck, Affleck, Affleck, Ahn, Baumgartl, Bloete, Cardy, Cardy, Cooper, Daniel Green, David Starr, Dorey, Dorey, Dorey, Dotsenko, Fendley, Fredenhagen, Fredenhagen, Freedman, Friedan, Gaberdiel, Ghoshal, Green, Harvey, Ishibashi, Karczmarek, Keller, Kitaev, LeClair, Lesage, Levin, Ludwig, Ludwig, Michael Mulligan, Polchinski, Polchinski, Recknagel, Recknagel, Schmidhuber, Sen, Zamolodchikov, Zamolodchikov   +44 more
core   +3 more sources

Intermolecular Interactions as Driving Force of Increasing Multiphoton Absorption in a Perylene Diimide‐Based Coordination Polymer

Advanced Functional Materials, EarlyView.
This study uncovers the unexplored role of intermolecular interactions in multiphoton absorption in coordination polymers. By analyzing [Zn2tpda(DMA)2(DMF)0.3], it shows how the electronic coupling of the chromophores and confinement in the MOF enhance two‐and three‐photon absorption.
Simon Nicolas Deger, Anna Mauri, Yang Cui, Sebastian Josef Weishäupl, Ali Deniz Özdemir, Hamad Syed, Aleksandr Ovsianikov, Wolfgang Wenzel, Alexander Pöthig, Jürgen Hauer, Mariana Kozlowska, Roland Augustinus Fischer   +11 more
wiley   +1 more source

Thermal Casimir effect with general boundary conditions

European Physical Journal C: Particles and Fields, 2020
In this paper we study the system of a scalar quantum field confined between two plane, isotropic, and homogeneous parallel plates at thermal equilibrium.
J. M. Muñoz-Castañeda, L. Santamaría-Sanz, M. Donaire, M. Tello-Fraile   +3 more
doaj   +1 more source

On a_2^(1) Reflection Matrices and Affine Toda Theories

, 1998
We construct new non-diagonal solutions to the boundary Yang-Baxter-Equation corresponding to a two-dimensional field theory with U_q(a_2^(1)) quantum affine symmetry on a half-line.
Arinshtein, Bowcock, Bowcock, Braden, Cherednik, Corrigan, Corrigan, de Vega, Fring, Fring, Fujii, Gandenberger, Gandenberger, Georg M. Gandenberger, Ghoshal, Ghoshal, Hollowood, Kim, Sklyanin   +18 more
core   +1 more source

Quantum field theory on manifolds with a boundary [PDF]

Journal of Physics A: Mathematical and General, 2005
We discuss quantum theory of fields defined on (d+1)-dimensional manifold {\cal M} with a boundary {\cal B}. The free action W_{0}( ) which is a bilinear form in defines the Gaussian measure with a covariance (Green function) {\cal G}. We discuss a relation between the quantum field theory with a fixed boundary condition and the theory defined ...
openaire   +3 more sources

NanoMOF‐Based Multilevel Anti‐Counterfeiting by a Combination of Visible and Invisible Photoluminescence and Conductivity

Advanced Functional Materials, EarlyView.
This study presents novel anti‐counterfeiting tags with multilevel security features that utilize additional disguise features. They combine luminescent nanosized Ln‐MOFs with conductive polymers to multifunctional mixed‐matrix membranes and powder composites. The materials exhibit visible/NIR emission and matrix‐based conductivity even as black bodies.
Moritz Maxeiner, Ruben Maile, Murat Cuvalli, Andreas Wolf, Ayisha Komal, Robert Oestreich, Christoph Janiak, Karl Mandel, Alexander Knebel, Klaus Müller‐Buschbaum   +9 more
wiley   +1 more source

Remarks on the influence of quantum vacuum fluctuations over a charged test particle near a conducting wall

Journal of High Energy Physics, 2019
Quantum vacuum fluctuations of the electromagnetic field in empty space seem not to produce observable effects over the motion of a charged test particle.
V. A. De Lorenci, C. C. H. Ribeiro
doaj   +1 more source

Local entanglement generation in the adiabatic regime

, 2010
We study entanglement generation in a pair of qubits interacting with an initially correlated system. Using time independent perturbation theory and the adiabatic theorem, we show conditions under which the qubits become entangled as the joint system ...
Andrzej Veitia, C. Cohen-Tannoudji, G. Polya, H. B. G. Casimir, I. S. Gradshteyn, L. I. Schiff, M. Cliche, M. E. Peskin, N. D. Birrell   +8 more
core   +1 more source

Towards quantum field theory on spacetimes with boundaries [PDF]

The Fourteenth Marcel Grossmann Meeting, 2017
Algebraic quantization has been applied on the class of globally hyperbolic spacetime for many decades, leading to remarkable results. Nonetheless, the presence of a boundary calls for a separate treatment, since, in general, it breaks global hyperbolicity and it requires the introduction of boundary conditions to the field equation. Although a general
openaire   +2 more sources