scholarly journals Ground State and Finite Temperature Lanczos Methods

2013 ◽  
pp. 1-30 ◽  
Author(s):  
P. Prelovšek ◽  
J. Bonča
Keyword(s):  
Ground State ◽  
Finite Temperature ◽  
Lanczos Methods

Ground state of high-density matter at finite temperature

1989 ◽  
Vol 231 (4) ◽  
pp. 444-448 ◽  
Author(s):  
Esteban Roulet ◽  
Daniele Tommasini
Keyword(s):  
Ground State ◽  
Finite Temperature ◽  
High Density ◽  
Density Matter

scholarly journals Hamiltonian Approach to QCD at Finite Temperature

Universe ◽  
2019 ◽  
Vol 5 (2) ◽  
pp. 40
Author(s):  
Hugo Reinhardt ◽  
Davide Campagnari ◽  
Markus Quandt
Keyword(s):  
Field Theory ◽  
Ground State ◽  
Finite Temperature ◽  
Hamiltonian Formulation ◽  
Spatial Dimension ◽  
Quantum Field ◽  
Hamiltonian Approach ◽  
Inverse Temperature ◽  
Chiral Phase ◽  
Novel Approach

A novel approach to the Hamiltonian formulation of quantum field theory at finite temperature is presented. The temperature is introduced by compactification of a spatial dimension. The whole finite-temperature theory is encoded in the ground state on the spatial manifold S 1 ( L ) × R 2 where L is the length of the compactified dimension which defines the inverse temperature. The approach is then applied to the Hamiltonian formulation of QCD in Coulomb gauge to study the chiral phase transition at finite temperatures.

scholarly journals MAGNETIC INSTABILITY IN A PARITY INVARIANT TWO-DIMENSIONAL FERMION SYSTEM

2000 ◽  
Vol 14 (14) ◽  
pp. 1441-1449 ◽  
Author(s):  
M. ELIASHVILI ◽  
G. TSITSISHVILI
Keyword(s):  
High Temperature ◽  
Temperature Regime ◽  
Ground State ◽  
Finite Temperature ◽  
Two Dimensional ◽  
Fermion System ◽  
Temperature Analysis ◽  
Magnetic Instability ◽  
High Temperature Regime

We consider the parity invariant QED2+1 where the matter is represented as a mixture of fermions with opposite spins. It is argued that the perturbative ground state of the system is unstable with respect to the formation of magnetized ground state. Carrying out the finite temperature analysis we show that the magnetic instability disappears in the high temperature regime.

scholarly journals Ground State and Finite Temperature Behavior of 1/4-Filled Band Zigzag Ladders

2012 ◽  
Vol 81 (7) ◽  
pp. 074707 ◽  
Author(s):  
Rudolf Torsten Clay ◽  
Jeong-Pil Song ◽  
Saurabh Dayal ◽  
Sumit Mazumdar
Keyword(s):  
Ground State ◽  
Finite Temperature ◽  
Temperature Behavior

INTERACTING BOSE GAS CONFINED BY AN EXTERNAL POTENTIAL

2007 ◽  
Vol 22 (27) ◽  
pp. 4923-4936 ◽  
Author(s):  
G. GNANAPRAGASAM ◽  
M. P. DAS
Keyword(s):  
Specific Heat ◽  
Ground State ◽  
Finite Temperature ◽  
Continuum Limit ◽  
Spectral Representation ◽  
Equation Of Motion ◽  
Bose Gas ◽  
External Potential ◽  
Green Functions ◽  
Motion Method

Interacting Bose gas confined by an external potential is studied using Green functions in spectral representation. The calculation is presented transparently using the equation of motion method. With this, the interplay between the condensed and the non-condensed atoms is inevitably seen. An expression for the condensate number at finite temperature is obtained in the lowest and first orders, from which depletion of bosons from the ground state is qualitatively analyzed. Finally, we discuss the behaviour of the specific heat of a trapped interacting Bose gas in the quasi-continuum limit.

NON-PERTURBATIVE CALCULATION OF EFFECTIVE POTENTIAL IN SUPERSYMMETRIC LIOUVILLE MODEL

1990 ◽  
Vol 05 (26) ◽  
pp. 2115-2125
Author(s):  
ROSE P. IGNATIUS ◽  
K. P. SATHEESH ◽  
V. C. KURIAKOSE ◽  
K. BABU JOSEPH
Keyword(s):  
Effective Potential ◽  
Ground State ◽  
Finite Temperature ◽  
Temperature Effects ◽  
Liouville Theory ◽  
Translational Symmetry ◽  
Zero Temperature ◽  
Perturbative Calculation ◽  
Gaussian Effective Potential

The Gaussian effective potential for the supersymmetric Liouville model is computed both at zero temperature and at a finite temperature. It is noted that the supersymmetric Liouville theory, just like the ordinary Liouville model, does not possess a translationally invariant ground state. The broken translational symmetry is not restored by temperature effects. The supersymmetric Liouville theory is also non-trivial.

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