Universal Quantum Computing Using Electronuclear Wavefunctions of Rare-Earth Ions

We propose a scheme for universal quantum computing based on Kramers rare-earth ions. Their nuclear spins in the presence of a Zeeman-split electronic crystal field ground state act as “passive” qubits that store quantum information. The “active” qubits are switched on optically by fast coherent tra...

Full description

Bibliographic Details
Main Authors: Manuel Grimm, Adrian Beckert, Gabriel Aeppli, Markus Müller
Format: Article
Language:English
Published: American Physical Society 2021-01-01
Series:PRX Quantum
Online Access:http://doi.org/10.1103/PRXQuantum.2.010312
_version_ 1819104405533753344
author Manuel Grimm
Adrian Beckert
Gabriel Aeppli
Markus Müller
author_facet Manuel Grimm
Adrian Beckert
Gabriel Aeppli
Markus Müller
author_sort Manuel Grimm
collection DOAJ
description We propose a scheme for universal quantum computing based on Kramers rare-earth ions. Their nuclear spins in the presence of a Zeeman-split electronic crystal field ground state act as “passive” qubits that store quantum information. The “active” qubits are switched on optically by fast coherent transitions to excited crystal field states with a magnetic moment, and the magnetic dipole interaction between these states is used to implement controlled not (cnot) gates. We compare our proposal with others, noting particularly the much improved cnot gate time as compared with a Si:P proposal, also relying on magnetic dipole interactions between active qubits, and rare-earth schemes depending on the dipole blockade for qubits spaced by more than of the order of 1nm.
first_indexed 2024-12-22T02:05:50Z
format Article
id doaj.art-b48c6cfcb97c461d9e2df7b89f8be181
institution Directory Open Access Journal
issn 2691-3399
language English
last_indexed 2024-12-22T02:05:50Z
publishDate 2021-01-01
publisher American Physical Society
record_format Article
series PRX Quantum
spelling doaj.art-b48c6cfcb97c461d9e2df7b89f8be1812022-12-21T18:42:32ZengAmerican Physical SocietyPRX Quantum2691-33992021-01-012101031210.1103/PRXQuantum.2.010312Universal Quantum Computing Using Electronuclear Wavefunctions of Rare-Earth IonsManuel GrimmAdrian BeckertGabriel AeppliMarkus MüllerWe propose a scheme for universal quantum computing based on Kramers rare-earth ions. Their nuclear spins in the presence of a Zeeman-split electronic crystal field ground state act as “passive” qubits that store quantum information. The “active” qubits are switched on optically by fast coherent transitions to excited crystal field states with a magnetic moment, and the magnetic dipole interaction between these states is used to implement controlled not (cnot) gates. We compare our proposal with others, noting particularly the much improved cnot gate time as compared with a Si:P proposal, also relying on magnetic dipole interactions between active qubits, and rare-earth schemes depending on the dipole blockade for qubits spaced by more than of the order of 1nm.http://doi.org/10.1103/PRXQuantum.2.010312
spellingShingle Manuel Grimm
Adrian Beckert
Gabriel Aeppli
Markus Müller
Universal Quantum Computing Using Electronuclear Wavefunctions of Rare-Earth Ions
PRX Quantum
title Universal Quantum Computing Using Electronuclear Wavefunctions of Rare-Earth Ions
title_full Universal Quantum Computing Using Electronuclear Wavefunctions of Rare-Earth Ions
title_fullStr Universal Quantum Computing Using Electronuclear Wavefunctions of Rare-Earth Ions
title_full_unstemmed Universal Quantum Computing Using Electronuclear Wavefunctions of Rare-Earth Ions
title_short Universal Quantum Computing Using Electronuclear Wavefunctions of Rare-Earth Ions
title_sort universal quantum computing using electronuclear wavefunctions of rare earth ions
url http://doi.org/10.1103/PRXQuantum.2.010312
work_keys_str_mv AT manuelgrimm universalquantumcomputingusingelectronuclearwavefunctionsofrareearthions
AT adrianbeckert universalquantumcomputingusingelectronuclearwavefunctionsofrareearthions
AT gabrielaeppli universalquantumcomputingusingelectronuclearwavefunctionsofrareearthions
AT markusmuller universalquantumcomputingusingelectronuclearwavefunctionsofrareearthions