Results 81 to 90 of about 748,547 (330)

Boundary energy and boundary states in integrable quantum field theories [PDF]

, 1995
We study the ground-state energy of integrable 1 + 1 quantum field theories with boundaries (the genuine Casimir effect). In the scalar case, this is done by introducing a new “R-channel TBA”, where the boundary is represented by a boundary state, and ...
A. LeClair, G. Mussardo, H. Saleur, S. Skorik   +3 more
semanticscholar   +1 more source

Does Quantum Gravity Happen at the Planck Scale?

Philosophy of Physics
The claim that, at the so-called Planck scale, our current physics breaks down and a new theory of quantum gravity is required is ubiquitous, but the evidence is shakier than the confidence of those assertions warrants.
Caspar Jacobs
doaj   +1 more source

Degenerate Perturbation Theory for Models of Quantum Field Theory with Symmetries

Annales Henri Poincaré, 2023
AbstractWe consider Hamiltonians of models describing non-relativistic quantum mechanical matter coupled to a relativistic field of bosons. If the free Hamiltonian has an eigenvalue, we show that this eigenvalue persists also for nonzero coupling. The eigenvalue of the free Hamiltonian may be degenerate provided there exists a symmetry group acting ...
Hasler, David, Lange, Markus
openaire   +3 more sources

Quantum Algorithms for Fermionic Quantum Field Theories [PDF]

, 2014
Extending previous work on scalar field theories, we develop a quantum algorithm to compute relativistic scattering amplitudes in fermionic field theories, exemplified by the massive Gross-Neveu model, a theory in two spacetime dimensions with quartic ...
Jordan, Stephen P., Lee, Keith S. M., Preskill, John   +2 more
core   +1 more source

On the Schwinger Model on Riemann Surfaces

, 1993
In this paper, the massless Schwinger model or two dimensional quantum electrodynamics is exactly solved on a Riemann surface. The partition function and the generating functional of the correlation functions involving the fermionic currents are ...
Abdalla, Adam, Alvarez-Gaumé, Barcelos-Neto, Barcelos-Neto, Bassetto, Birrel, Blau, Bocharek, Buchbinder, Capri, Capri, Coleman, Das, Dilger, Donaldson, Faddeev, Fay, Ferrari, Ferrari, Ferrari, Ferrari, Fine, Franco Ferrari, Freedman, Fröhlich, Fulling, Gattringer, Gross, Gupta, Hetrick, Jackiw, Jayewardena, Joos, Joos, Killingback, Kripfganz, Lowenstein, Manton, McCartor, Migdal, Moffat, Morchio, Porrati, Raina, Rajeev, Rovelli, Rusakov, Sachs, Sachs, Schwinger, Sommerfield, Thirring, Tomboulis, Witten, Witten   +55 more
core   +1 more source

On The Conformal Field Theory Of The Higgs Branch [PDF]

, 1997
We study 1+1-dimensional theories of vector and hypermultiplets with (4,4) supersymmetry. Despite strong infrared fluctuations, these theories flow in general to distinct conformal field theories on the Coulomb and Higgs branches. In some cases there may
Witten, Edward
core   +2 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

Spin network setting of topological quantum computation

, 2004
The spin network simulator model represents a bridge between (generalised) circuit schemes for standard quantum computation and approaches based on notions from Topological Quantum Field Theories (TQFTs).
ANNALISA MARZUOLI, Biedenharn L. C., Carbone G., MARIO RASETTI, Marzuoli A., Zanardi P.   +5 more
core   +1 more source

General-relativistic quantum field theory: An exactly soluble model

Physical Review D, 1975
The massive scalar and Dirac fields quantized on a de Sitter background geometry prove to be exactly soluble models in general-relativistic field theory. The Feynman Green's function is computed for both the scalar and Dirac fields. A dimensional regularization procedure applied in coordinate space facilitates the calculation of their respective ...
Candelas, P, Raine, D
openaire   +1 more source

Quantum impurity models from conformal field theory [PDF]

Journal of High Energy Physics, 2019
Abstract The coupling between localized magnetic moments and itinerant electrons presents a plethora of interesting physics. The low-energy physics of some quantum impurity systems can be described using conformal field theory (CFT). In this paper, the connection between quantum impurity models and CFT is further strengthened as we
Wu, Ying-Hai, Tu, Hong-Hao
openaire   +3 more sources