scholarly journals Topological phase diagram and saddle point singularity in a tunable topological crystalline insulator

2015 ◽  
Vol 92 (7) ◽  
Author(s):  
Madhab Neupane ◽  
Su-Yang Xu ◽  
R. Sankar ◽  
Q. Gibson ◽  
Y. J. Wang ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Saddle Point ◽  
Topological Phase ◽  
Point Singularity ◽  
Topological Crystalline Insulator

scholarly journals Entanglement and Disordered-Enhanced Topological Phase in the Kitaev Chain

Universe ◽  
2019 ◽  
Vol 5 (1) ◽  
pp. 33 ◽  
Author(s):  
Liron Levy ◽  
Moshe Goldstein
Keyword(s):  
Phase Diagram ◽  
Information Theory ◽  
Quantum Information ◽  
Critical Point ◽  
Entanglement Entropy ◽  
Quantum Information Theory ◽  
Topological Phase ◽  
Many Body ◽  
Zero Modes ◽  
Many Body Systems

In recent years, tools from quantum information theory have become indispensable in characterizing many-body systems. In this work, we employ measures of entanglement to study the interplay between disorder and the topological phase in 1D systems of the Kitaev type, which can host Majorana end modes at their edges. We find that the entanglement entropy may actually increase as a result of disorder, and identify the origin of this behavior in the appearance of an infinite-disorder critical point. We also employ the entanglement spectrum to accurately determine the phase diagram of the system, and find that disorder may enhance the topological phase, and lead to the appearance of Majorana zero modes in systems whose clean version is trivial.

scholarly journals Topological phase diagram of coupled spinless p-wave superconductors

2019 ◽  
Vol 1226 ◽  
pp. 012015 ◽  
Author(s):  
A Maiellaro ◽  
F Romeo ◽  
R Citro
Keyword(s):  
Phase Diagram ◽  
P Wave ◽  
Topological Phase

Resonant Raman scattering at the saddle-point singularity inInxGa1−xAs

1985 ◽  
Vol 32 (2) ◽  
pp. 1005-1008 ◽  
Author(s):  
K. P. Jain ◽  
R. K. Soni ◽  
S. C. Abbi ◽  
M. Balkanski
Keyword(s):  
Raman Scattering ◽  
Saddle Point ◽  
Point Singularity ◽  
Resonant Raman ◽  
Resonant Raman Scattering
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