Polarimetry With Spins in the Solid State

The ability for optically active media to rotate the polarization of light is the basis of polarimetry, an illustrious technique responsible for many breakthroughs in fields as varied as astronomy, medicine and material science. Here, we recast the primary mechanism for spin readout in semiconductor...

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Published in:arXiv.org 2024-10
Main Authors: Peri, Lorenzo, Felix-Ekkehard von Horstig, Barraud, Sylvain, d, Christopher J B, Benito, Mónica, Gonzalez-Zalba, M Fernando
Format: Article
Language:English
Subjects:
Astronomical polarimetry
Astronomy
Misalignment
Optical activity
Quantum computers
Quantum computing
Quantum dots
Spin-orbit interactions
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creator Peri, Lorenzo
Felix-Ekkehard von Horstig
Barraud, Sylvain
d, Christopher J B
Benito, Mónica
Gonzalez-Zalba, M Fernando
description The ability for optically active media to rotate the polarization of light is the basis of polarimetry, an illustrious technique responsible for many breakthroughs in fields as varied as astronomy, medicine and material science. Here, we recast the primary mechanism for spin readout in semiconductor-based quantum computers, Pauli spin-blockade (PSB), as the natural extension of polarimetry to the third dimension. We perform polarimetry with spins through a silicon quantum dot exchanging a hole with a boron acceptor, demonstrating the role of spin-orbit coupling in creating spin misalignment. Perfect spin alignment may be recovered by means of rotating the applied magnetic-field orientation. This work shows how spin misalignment sets a fundamental upper limit for the spin readout fidelity in quantum-computing systems based on PSB.
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subjects Astronomical polarimetry
Astronomy
Misalignment
Optical activity
Quantum computers
Quantum computing
Quantum dots
Spin-orbit interactions
title Polarimetry With Spins in the Solid State
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