Results 21 to 30 of about 979 (82)

Heavy Fermion Stabilization of Solitons in 1+1 Dimensions [PDF]

, 2000
We find static solitons stabilized by quantum corrections in a (1+1)-dimensional model with a scalar field chirally coupled to fermions. This model does not support classical solitons.
Alkofer, Anderson, Bagger, Barton, Campell, Coleman, Coleman, D'Hoker, Dashen, Dimopoulos, Dunne, E. Farhi, Farhi, Farhi, Feinberg, Goldstone, Graham, Graham, Graham, H. Weigel, Jackiw, MacKenzie, Moussallam, N. Graham, Naculich, Nastase, Perry, R.L. Jaffe, Rebhan, Ripka, Shei   +30 more
core   +5 more sources

Levinson's Theorem for Non-local Interactions in Two Dimensions

, 1998
In the light of the Sturm-Liouville theorem, the Levinson theorem for the Schr\"{o}dinger equation with both local and non-local cylindrically symmetric potentials is studied. It is proved that the two-dimensional Levinson theorem holds for the case with
Chadan Kh, Dong Shi-Hai, Dong Shi-Hai, Englefield M J, Jauch J M, Kermode M W, Levinson N, Ma Z Q, Martin A, Martin P A, Newton R G, Newton R G, Newton R G, Newton R G, Newton R G, Ni G J, Okai S, Saito S, Saito S, Shi-Hai Dong, Tamagaki R, Xi-Wen Hou, Yang C N, Zhong-Qi Ma   +23 more
core   +1 more source

The Strong Levinson Theorem for the Dirac Equation

, 2004
We consider the Dirac equation in one space dimension in the presence of a symmetric potential well. We connect the scattering phase shifts at E=+m and E=-m to the number of states that have left the positive energy continuum or joined the negative ...
Alex Calogeracos, M-C. Barthélémy, N. Levinson, Norman Dombey, R. G. Newton   +4 more
core   +1 more source

Signatures of S-wave bound-state formation in finite volume [PDF]

, 2006
We discuss formation of an S-wave bound-state in finite volume on the basis of L\"uscher's phase-shift formula.It is found that although a bound-state pole condition is fulfilled only in the infinite volume limit, its modification by the finite size ...
R. G. Newton, S. Sasaki, Shoichi Sasaki, Takeshi Yamazaki   +3 more
core   +2 more sources

Bayesian inverse ensemble forecasting for COVID‐19

Canadian Journal of Statistics, EarlyView.
Abstract Variations in strains of COVID‐19 have a significant impact on the rate of surges and on the accuracy of forecasts of the epidemic dynamics. The primary goal for this article is to quantify the effects of varying strains of COVID‐19 on ensemble forecasts of individual “surges.” By modelling the disease dynamics with an SIR model, we solve the ...
Kimberly Kroetch, Don Estep
wiley   +1 more source

The Virial Expansion of the Hydrogen Equation of State in Comparison to PIMC Simulations: The Quasiparticle Concept, IPD, and Ionization Degree

Contributions to Plasma Physics, EarlyView.
ABSTRACT The properties of plasmas in the low‐density limit are described by virial expansions. Analytical expressions are known for the lowest virial coefficients from Green's function approaches. Recently, accurate path‐integral Monte Carlo (PIMC) simulations were performed for the hydrogen plasma at low densities by Filinov and Bonitz (Phys. Rev.
Gerd Röpke, Chengliang Lin, W. Ebeling, H. Reinholz   +3 more
wiley   +1 more source

Extremely Fast Maximum Likelihood Estimation of High‐Order Autoregressive Models

Journal of Time Series Analysis, EarlyView.
ABSTRACT We consider the problem of exact maximum likelihood estimation of potentially high‐order (p>50$$ p>50 $$) autoregressive models. We propose an extremely fast coordinate‐wise algorithm for fitting autoregressive models. This fast algorithm exploits several properties of the negative log‐likelihood when parameterised in terms of partial ...
Daniel F. Schmidt, Enes Makalic
wiley   +1 more source

Fermionic One-Loop Corrections to Soliton Energies in 1+1 Dimensions

, 2003
We demonstrate an unambiguous and robust method for computing fermionic corrections to the energies of classical background field configurations.
Barton, Chatterjee, Chatterjee, Christ, d'Adda, d'Adda, Farhi, Graham, Graham, Horsley, Imbimbo, Kaul, N Graham, R.L Jaffe, Rebhan, Rouhani, Schiff, Schonfeld, Uchiyama, Uchiyama, Uchiyama, Yamagishi   +21 more
core   +2 more sources

Musical Mereology

Pacific Philosophical Quarterly, EarlyView.
ABSTRACT I develop an axiomatic system of mereology that accounts for the ways in which musical works can be said to have parts. I distinguish two fundamental modes of composition that musical works exhibit: successive composition, whereby sound events are concatenated in time, and simultaneous composition, whereby sound events occur at the same time ...
Alejandro G. Di Rienzo
wiley   +1 more source

Levinson's theorem for Schroedinger operators with point interaction: a topological approach

, 2006
In this note Levinson theorems for Schroedinger operators in R^n with one point interaction at 0 are derived using the concept of winding numbers.
Albeverio S, Johannes Kellendonk, Kellendonk J Richard S, Kellendonk J Richard S, Serge Richard   +4 more
core   +1 more source