scholarly journals Effect of magnetic pair breaking on Andreev bound states and resonant supercurrent in quantum dot Josephson junctions

2007 ◽  
Vol 75 (13) ◽  
Author(s):  
Grygoriy Tkachov ◽  
Klaus Richter
Keyword(s):  
Quantum Dot ◽  
Josephson Junctions ◽  
Bound States ◽  
Pair Breaking ◽  
Andreev Bound States ◽  
Magnetic Pair

scholarly journals Fundamental dissipation due to bound fermions in the zero-temperature limit

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
S. Autti ◽  
S. L. Ahlstrom ◽  
R. P. Haley ◽  
A. Jennings ◽  
G. R. Pickett ◽  
...  
Keyword(s):  
Critical Velocity ◽  
Ground State ◽  
Bound States ◽  
Bound State ◽  
Temperature Limit ◽  
Pair Breaking ◽  
Zero Temperature ◽  
Andreev Bound States ◽  
Macroscopic Object

Abstract The ground state of a fermionic condensate is well protected against perturbations in the presence of an isotropic gap. Regions of gap suppression, surfaces and vortex cores which host Andreev-bound states, seemingly lift that strict protection. Here we show that in superfluid 3He the role of bound states is more subtle: when a macroscopic object moves in the superfluid at velocities exceeding the Landau critical velocity, little to no bulk pair breaking takes place, while the damping observed originates from the bound states covering the moving object. We identify two separate timescales that govern the bound state dynamics, one of them much longer than theoretically anticipated, and show that the bound states do not interact with bulk excitations.

scholarly journals Transport through Andreev bound states in a Weyl semimetal quantum dot

2017 ◽  
Vol 96 (16) ◽  
Author(s):  
Dibya Kanti Mukherjee ◽  
Sumathi Rao ◽  
Arijit Kundu
Keyword(s):  
Quantum Dot ◽  
Bound States ◽  
Andreev Bound States ◽  
Weyl Semimetal

scholarly journals Kondo screening of Andreev bound states in a normal metal–quantum dot–superconductor system

2016 ◽  
Vol 94 (16) ◽  
Author(s):  
Lin Li ◽  
Zhan Cao ◽  
Tie-Feng Fang ◽  
Hong-Gang Luo ◽  
Wei-Qiang Chen
Keyword(s):  
Quantum Dot ◽  
Bound States ◽  
Normal Metal ◽  
Andreev Bound States ◽  
Kondo Screening

scholarly journals Spatial Rabi oscillations between Majorana bound states and quantum dots

2018 ◽  
Vol 9 ◽  
pp. 1527-1535
Author(s):  
Jun-Hui Zheng ◽  
Dao-Xin Yao ◽  
Zhi Wang
Keyword(s):  
Quantum Dot ◽  
Bound States ◽  
Bound State ◽  
Double Quantum ◽  
Energy Splitting ◽  
Rabi Oscillations ◽  
Andreev Bound States ◽  
Majorana Bound States ◽  
Nonlocal Quantum ◽  
Equal Amplitude

Background: A Majorana bound state is a superconducting quasiparticle that is the superposition of particle and hole with equal amplitude. We propose a verification of this amplitude equality by analyzing the spatial Rabi oscillations of the quantum states of a quantum dot that is tunneling-coupled to the Majorana bound states. Results: We find two resonant Rabi driving energies that correspond to the energy splitting due to the coupling of two spatially separated Majorana bound states. The resulting Rabi oscillating frequencies from these two different resonant driving energies are identical for the Majorana bound states, while different for ordinary Andreev bound states. We further study a double-quantum-dot setup and find a nonlocal quantum correlation between them that is mediated by two Majorana bound states. This nonlocal correlation has the signature of additional resonant driving energies. Conclusion: Our method can be used to distinguish between Majorana bound states and Andreev bound states. It also gives a precise measurement of the energy splitting between two Majorana bound states.

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