scholarly journals Zero-temperature phases of the two-dimensional Hubbard-Holstein model: A non-Gaussian exact diagonalization study

2020 ◽  
Vol 2 (4) ◽  
Author(s):  
Yao Wang ◽  
Ilya Esterlis ◽  
Tao Shi ◽  
J. Ignacio Cirac ◽  
Eugene Demler
Keyword(s):  
Exact Diagonalization ◽  
Two Dimensional ◽  
Zero Temperature ◽  
Holstein Model ◽  
Non Gaussian

scholarly journals Spinning rough disc moving in a rarefied medium

2010 ◽  
Vol 466 (2119) ◽  
pp. 2033-2055 ◽  
Author(s):  
Alexander Plakhov ◽  
Tatiana Tchemisova ◽  
Paulo Gouveia
Keyword(s):  
The Body ◽  
Two Dimensional ◽  
Zero Temperature ◽  
Optimal Mass Transport ◽  
Dense Gases ◽  
Magnus Effect ◽  
Inverse Effect ◽  
Transversal Force ◽  
The Moment ◽  
Complementary Mechanism

We study the Magnus effect: deflection of the trajectory of a spinning body moving in a gas. It is well known that in rarefied gases, the inverse Magnus effect takes place, which means that the transversal component of the force acting on the body has opposite signs in sparse and relatively dense gases. The existing works derive the inverse effect from non-elastic interaction of gas particles with the body. We propose another (complementary) mechanism of creating the transversal force owing to multiple collisions of particles in cavities of the body surface. We limit ourselves to the two-dimensional case of a rough disc moving through a zero-temperature medium on the plane, where reflections of the particles from the body are elastic and mutual interaction of the particles is neglected. We represent the force acting on the disc and the moment of this force as functionals depending on ‘shape of the roughness’, and determine the set of all admissible forces. The disc trajectory is determined for several simple cases. The study is made by means of billiard theory, Monge–Kantorovich optimal mass transport and by numerical methods.

Generalized Zero-Temperature Glauber Dynamics in a Two-Dimensional Square Lattice

2012 ◽  
Vol 29 (12) ◽  
pp. 120502
Author(s):  
Qing-Kuan Meng ◽  
Dong-Tai Feng ◽  
Xu-Tuan Gao ◽  
Yu-Xue Mei
Keyword(s):  
Glauber Dynamics ◽  
Square Lattice ◽  
Two Dimensional ◽  
Zero Temperature ◽  
Generalized Zero

scholarly journals Zero-temperature coarsening in the two-dimensional long-range Ising model

2021 ◽  
Vol 103 (5) ◽  
Author(s):  
Henrik Christiansen ◽  
Suman Majumder ◽  
Wolfhard Janke
Keyword(s):  
Ising Model ◽  
Long Range ◽  
Two Dimensional ◽  
Zero Temperature

Two-dimensional non-Gaussian autoregressive model order determination

2002 ◽  
Vol 9 (12) ◽  
pp. 426-428 ◽  
Author(s):  
S. Rital ◽  
A. Meziane ◽  
M. Rziza ◽  
D. Aboutajdine
Keyword(s):  
Autoregressive Model ◽  
Two Dimensional ◽  
Model Order ◽  
Non Gaussian ◽  
Model Order Determination ◽  
Order Determination

Two-Step Evolution of the Quasiparticle Band with Doping in the Two-Dimensional t-t′-t″-J Model

1998 ◽  
Vol 12 (29n31) ◽  
pp. 2914-2919
Author(s):  
Chang-De Gong ◽  
Wei-Guo Yin ◽  
P. W. Leung
Keyword(s):  
Theoretical Analysis ◽  
Excellent Agreement ◽  
Exact Diagonalization ◽  
Flat Band ◽  
Two Dimensional ◽  
Doping Dependence ◽  
Flat Region ◽  
Half Filling ◽  
Quasiparticle Band

We study the doping dependence of photoemission spectra for the t-t′-t″-J model by using the exact diagonalization technique and present a consistent theoretical analysis. Both calculations show that upon doping the enhancement of incoherent motion of holes due to the t′ and t″ terms accounts for the formation of the flat region around (π,0) in the quasiparticle dispersion at underdoped and optimally doped region, despite the absence of the flat band at half filling. Our results are in excellent agreement with resent photoemission experiments on Bi 2 Sr 2 Ca 1 Cu 2 O 8+δ [Marshall et al., Phys. Rev. Lett.76, 4841 (1996)] and Sr 2 CuO 2 Cl 2 [Wells et al., Phys. Rev. Lett.74, 964 (1995)].

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