Nonlocal correlations transmitted between quantum dots via short topological superconductor.

Area of Science:

• Condensed Matter Physics
• Quantum Information Science

Background:

• Topological superconducting nanowires host Majorana modes, crucial for topological quantum computing.
• Hybrid structures combining quantum dots and topological superconductors are promising for exploring exotic quantum phenomena.

Purpose of the Study:

• Investigate quasiparticle states and nonlocal correlations in a hybrid structure of quantum dots and a topological superconducting nanowire.
• Understand the role of hybridization and emergent molecular states in generating nonlocal correlations.
• Propose experimental methods to probe these predicted effects.

Main Methods:

• Theoretical modeling of a hybrid structure comprising two quantum dots coupled via a topological superconducting nanowire.
• Analysis of quasiparticle states and energy structure.
• Focus on hybridization effects between quantum dots and Majorana modes.
• Spectroscopic analysis, specifically crossed Andreev reflection.

Main Results:

• Hybridization leads to the emergence of molecular states.
• These molecular states are responsible for nonlocal correlations.
• Inter-dependence of quasiparticles in individual quantum dots is analyzed.
• Prediction of observable nonlocal effects.

Conclusions:

• The proposed hybrid structure exhibits emergent molecular states driving nonlocal correlations.
• Crossed Andreev reflection spectroscopy is a viable method for probing these effects.
• Findings are relevant to experimental realizations of the minimal Kitaev model with side-attached quantum dots.