scholarly journals Three-boson bound states in Minkowski space with contact interactions

2020 ◽  
Vol 101 (9) ◽  
Author(s):  
E. Ydrefors ◽  
J. H. Alvarenga Nogueira ◽  
V. A. Karmanov ◽  
T. Frederico
Keyword(s):  
Minkowski Space ◽  
Bound States ◽  
Contact Interactions

Relativistic bound states in three space-time dimensions in Minkowski space

2016 ◽  
Author(s):  
C. Gutierrez ◽  
V. Gigante ◽  
T. Frederico ◽  
Lauro Tomio
Keyword(s):  
Minkowski Space ◽  
Bound States ◽  
Space Time ◽  
Relativistic Bound States ◽  
Three Space

scholarly journals Bound States in Minkowski Space in 2 + 1 Dimensions

2015 ◽  
Vol 56 (6-9) ◽  
pp. 375-380 ◽  
Author(s):  
V. Gigante ◽  
T. Frederico ◽  
C. Gutierrez ◽  
L. Tomio
Keyword(s):  
Minkowski Space ◽  
Bound States

scholarly journals Studies of three-body bound states with zero-range interaction in Minkowski space

2020 ◽  
Author(s):  
Emanuel Ydrefors ◽  
Jorge H Alvarenga Nogueira ◽  
Vladimir Karmanov ◽  
Tobias Frederico
Keyword(s):  
Minkowski Space ◽  
Bound States ◽  
Range Interaction ◽  
Zero Range ◽  
Three Body

scholarly journals A REMARK ON ONE-DIMENSIONAL MANY-BODY PROBLEMS WITH POINT INTERACTIONS

2000 ◽  
Vol 14 (07) ◽  
pp. 721-727 ◽  
Author(s):  
SERGIO ALBEVERIO ◽  
LUDWIK DABROWSKI ◽  
SHAO-MING FEI
Keyword(s):  
Singular Point ◽  
Bound States ◽  
Quantum Mechanical ◽  
Contact Interactions ◽  
Many Body ◽  
Point Interactions ◽  
One Dimensional ◽  
Integrable Quantum ◽  
Scattering Matrices ◽  
Many Body Systems

The integrability of one-dimensional quantum mechanical many-body problems with general contact interactions is extensively studied. It is shown that besides the pure (repulsive or attractive) δ-function interaction there is another singular point interactions which gives rise to a new one-parameter family of integrable quantum mechanical many-body systems. The bound states and scattering matrices are calculated for both bosonic and fermionic statistics.

scholarly journals The Bethe-Salpeter approach to bound states: from Euclidean to Minkowski space

2019 ◽  
Vol 1291 ◽  
pp. 012006 ◽  
Author(s):  
A Castro ◽  
E Ydrefors ◽  
W de Paula ◽  
T Frederico ◽  
J H de Alvarenga Nogueira ◽  
...  
Keyword(s):  
Minkowski Space ◽  
Bound States

scholarly journals Fermionic bound states in Minkowski space: light-cone singularities and structure

2017 ◽  
Vol 77 (11) ◽  
Author(s):  
Wayne de Paula ◽  
Tobias Frederico ◽  
Giovanni Salmè ◽  
Michele Viviani ◽  
Rafael Pimentel
Keyword(s):  
Minkowski Space ◽  
Light Cone ◽  
Bound States

scholarly journals Solving the Bethe - Salpeter Equation in Minkowski Space: Scalar Theories and Beyond

1997 ◽  
Vol 50 (1) ◽  
pp. 147 ◽  
Author(s):  
K. Kusaka ◽  
A. G. Williams ◽  
K. M. Simpson
Keyword(s):  
Euclidean Space ◽  
Minkowski Space ◽  
Vertex Function ◽  
Bound States ◽  
Spectral Representation ◽  
Ladder Approximation ◽  
Wick Rotation ◽  
Space Solution ◽  
Scalar Theories ◽  
Scattering Kernel

The Bethe–Salpeter equation (BSE) for bound states in scalar theories is reformulated and solved in terms of a generalized spectral representation directly in Minkowski space. This differs from the conventional approach, where the BSE is solved in Euclidean space after a Wick rotation. For all but the lowest-order (i.e. ladder) approximation to the scattering kernel, the naive Wick rotation is invalid. Our approach generates the vertex function and Bethe–Salpeter amplitude for the entire allowed range of momenta, whereas these cannot be directly obtained from the Euclidean space solution. Our method is quite general and can be applied even in cases where the Wick rotation is not possible.

scholarly journals Preface: Quarks, hadrons and nuclei

1997 ◽  
Vol 50 (1) ◽  
pp. I
Keyword(s):  
Euclidean Space ◽  
Minkowski Space ◽  
Vertex Function ◽  
Bound States ◽  
Spectral Representation ◽  
Ladder Approximation ◽  
Wick Rotation ◽  
Space Solution ◽  
Scalar Theories ◽  
Scattering Kernel

The Bethe–Salpeter equation (BSE) for bound states in scalar theories is reformulated and solved in terms of a generalized spectral representation directly in Minkowski space. This differs from the conventional approach, where the BSE is solved in Euclidean space after a Wick rotation. For all but the lowest-order (i.e. ladder) approximation to the scattering kernel, the naive Wick rotation is invalid. Our approach generates the vertex function and Bethe–Salpeter amplitude for the entire allowed range of momenta, whereas these cannot be directly obtained from the Euclidean space solution. Our method is quite general and can be applied even in cases where the Wick rotation is not possible.

scholarly journals Solving the Bethe-Salpeter equation for bound states of scalar theories in Minkowski space

1997 ◽  
Vol 56 (8) ◽  
pp. 5071-5085 ◽  
Author(s):  
Kensuke Kusaka ◽  
Ken Simpson ◽  
Anthony G. Williams
Keyword(s):  
Minkowski Space ◽  
Bound States ◽  
Scalar Theories

Recent Radiative and Collisional Atomic Data of Astrophysical Interest

1988 ◽  
Vol 102 ◽  
pp. 129-132
Author(s):  
K.L. Baluja ◽  
K. Butler ◽  
J. Le Bourlot ◽  
C.J. Zeippen
Keyword(s):  
Mass Production ◽  
Bound States ◽  
Physical Models ◽  
Impact Excitation ◽  
Electron Impact Excitation ◽  
Atomic Data ◽  
Isoelectronic Sequence ◽  
Astrophysical Interest ◽  
Radiative Transitions ◽  
Forbidden Transitions

SummaryUsing sophisticated computer programs and elaborate physical models, accurate radiative and collisional atomic data of astrophysical interest have been or are being calculated. The cases treated include radiative transitions between bound states in the 2p4and 2s2p5configurations of many ions in the oxygen isoelectronic sequence, the photoionisation of the ground state of neutral iron, the electron impact excitation of the fine-structure forbidden transitions within the 3p3ground configuration of CℓIII, Ar IV and K V, and the mass-production of radiative data for ions in the oxygen and fluorine isoelectronic sequences, as part of the international Opacity Project.

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