Pseudogap Induced by the SC Fluctuation: Higher Order Correction Beyond the T-Matrix Approximation

2003 ◽  
Vol 17 (18n20) ◽  
pp. 3594-3597 ◽  
Author(s):  
Y. Yanase
Keyword(s):  
Higher Order ◽  
The Self ◽  
Order Correction ◽  
Vertex Correction ◽  
Matrix Approach ◽  
Matrix Approximation ◽  
Self Consistent ◽  
T Matrix ◽  
Superconducting Fluctuation

We discuss the pseudogap phenomena in High-T c superconductors. The superconducting fluctuation is taken into account as an origin of the pseudogap. Then, the T-matrix approach has been widely used. We report a development along this line. The higher order correction, which is important to capture the effects of the SC fluctuation more precisely, is investigated. It is shown that the vertex correction, which is not included in the self-consistent T-matrix approximation, enhances the pseudogap.

scholarly journals Self-consistent T-matrix approach to Bose-glass in one dimension

2016 ◽  
Vol 397 ◽  
pp. 11-19
Author(s):  
A.G. Yashenkin ◽  
O.I. Utesov ◽  
A.V. Sizanov ◽  
A.V. Syromyatnikov
Keyword(s):  
One Dimension ◽  
Matrix Approach ◽  
Self Consistent ◽  
Bose Glass ◽  
T Matrix

Momentum distribution and the universal contact of a unitary Fermi gas with particle-hole fluctuation

2018 ◽  
Vol 32 (21) ◽  
pp. 1850249 ◽  
Author(s):  
Xiao-Xia Ruan ◽  
Hao Gong ◽  
Zheng-Ling Wang ◽  
Hong-Shi Zong
Keyword(s):  
Experimental Data ◽  
Momentum Distribution ◽  
Fermi Gas ◽  
Normal Phase ◽  
Large Momentum ◽  
Matrix Approximation ◽  
Self Consistent ◽  
Theoretical Predictions ◽  
Unitary Fermi Gas ◽  
T Matrix

We compute the momentum distribution of a homogeneous Fermi gas at unitarity in the normal phase within the framework of the non-self-consistent T-matrix approximation with particle-hole fluctuation. From the large-momentum behavior of momentum distribution, we obtain the contact for the unitary Fermi gas. We also compare our results with experimental data and other theoretical predictions.

The energy of a unitary Fermi gas in the normal phase including the effect of induced interaction

2015 ◽  
Vol 29 (32) ◽  
pp. 1550207 ◽  
Author(s):  
Hao Gong ◽  
Xiao-Xia Ruan ◽  
Hou-Rong Pang ◽  
Hong-Shi Zong
Keyword(s):  
Experimental Data ◽  
Chemical Potential ◽  
Normal Phase ◽  
Fermi Gases ◽  
Matrix Approximation ◽  
Ultracold Fermi Gases ◽  
Self Consistent ◽  
Unitary Fermi Gas ◽  
T Matrix ◽  
Good Agreement

In this paper, taking into account the effect of the induced interaction, we calculate the energy of ultracold Fermi gases at unitarity in the framework of non-self-consistent T-matrix approximation (nTMA) above the critical temperature and compare the result with the experimental data and other theoretical calculation without induced interaction. Our calculated chemical potential is higher than the experimental data, but our calculated energy obtains a good agreement with Tokyo experiment for temperature range between [Formula: see text] and [Formula: see text].

scholarly journals A density matrix approach to the convergence of the self-consistent field iteration

2019 ◽  
Vol 0 (0) ◽  
pp. 0-0
Author(s):  
Parikshit Upadhyaya ◽  
◽  
Elias Jarlebring ◽  
Emanuel H. Rubensson ◽  
Keyword(s):  
Density Matrix ◽  
The Self ◽  
Matrix Approach ◽  
Consistent Field ◽  
Self Consistent ◽  
Self Consistent Field
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