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Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

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Entanglement routers using macroscopic singlets.

Abolfazl Bayat¹, Sougato Bose, Pasquale Sodano

¹Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom.

Physical Review Letters

|January 15, 2011

Summary

This summary is machine-generated.

We demonstrate a novel method to create high entanglement between distant spins by connecting two Kondo spin chains. This technique efficiently routes entanglement and is linked to the emergence of Kondo clouds.

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Area of Science:

Condensed matter physics
Quantum information science

Background:

Entanglement is crucial for quantum technologies.
Controlling entanglement in spin chains is challenging.

Purpose of the Study:

To propose a mechanism for generating high entanglement between distant boundary spins.
To demonstrate efficient entanglement routing in composite spin chains.

Main Methods:

Connecting two long Kondo spin chains.
Analyzing entanglement dynamics using a two-singlet model.

Main Results:

Achieved high entanglement between very distant boundary spins.
Showed efficient entanglement routing capabilities.
Validated dynamics with a simple two-singlet model.

Conclusions:

The proposed mechanism effectively routes entanglement in Kondo systems.
This routing is a signature of Kondo cloud emergence.
The method is adaptable to various physical systems.