scholarly journals Topological phase diagram of a three-terminal Josephson junction: From the conventional to the Majorana regime

2019 ◽  
Vol 100 (1) ◽  
Author(s):  
Lucila Peralta Gavensky ◽  
Gonzalo Usaj ◽  
C. A. Balseiro
Keyword(s):  
Phase Diagram ◽  
Josephson Junction ◽  
Topological Phase

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

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

Phase diagram of dissipative two-dimensional Josephson junction arrays

2006 ◽  
pp. 254-262
Author(s):  
Luca Capriotti ◽  
Alessandro Cuccoli ◽  
Andrea Fubini ◽  
Valerio Tognetti ◽  
Ruggero Vaia
Keyword(s):  
Phase Diagram ◽  
Josephson Junction ◽  
Two Dimensional ◽  
Josephson Junction Arrays ◽  
Junction Arrays

Effects of Quantum and Thermal Fluctuations on the Stability of Mutual Phase-Locking in Long Josephson Junction Stacks

2003 ◽  
Vol 17 (18n20) ◽  
pp. 3708-3712
Author(s):  
Ju H. Kim
Keyword(s):  
Phase Diagram ◽  
Josephson Junction ◽  
Phase Locking ◽  
High Temperature Superconductors ◽  
Thermal Fluctuations ◽  
Stable Phase ◽  
Induction Effect ◽  
One Dimensional ◽  
The Stability ◽  
Charging Effect

We report the effects of quantum and thermal fluctuations on the stability of phase-locking in one-dimensional long Josephson junction (LJJ) devices, involving high temperature superconductors. Accounting for both the magnetic induction effect and the charging effect, we determine the zero temperature (T = 0) stability phase diagram using renormalization group (RG) analysis. This phase diagram shows that the in-phase mode is stable but some out-of-phase modes are unstable against quantum fluctuations. At finite T, all stable phase-locked modes (at T = 0) are unstable, but its stability is maintained within the decoherence length which decreases inversely with T.

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