dorsal/arxiv
View SchemaQuantum cellular automata quantum computing with endohedral fullerenes
| Authors | J. Twamley |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0210202 |
| URL | https://arxiv.org/abs/quant-ph/0210202 |
| DOI | 10.1103/PhysRevA.67.052318 |
Abstract
We present a scheme to perform universal quantum computation using global addressing techniques as applied to a physical system of endohedrally doped fullerenes. The system consists of an ABAB linear array of Group V endohedrally doped fullerenes. Each molecule spin site consists of a nuclear spin coupled via a Hyperfine interaction to an electron spin. The electron spin of each molecule is in a quartet ground state $S=3/2$. Neighboring molecular electron spins are coupled via a magnetic dipole interaction. We find that an all-electron construction of a quantum cellular automata is frustrated due to the degeneracy of the electronic transitions. However, we can construct a quantum celluar automata quantum computing architecture using these molecules by encoding the quantum information on the nuclear spins while using the electron spins as a local bus. We deduce the NMR and ESR pulses required to execute the basic cellular automata operation and obtain a rough figure of merit for the the number of gate operations per decoherence time. We find that this figure of merit compares well with other physical quantum computer proposals. We argue that the proposed architecture meets well the first four DiVincenzo criteria and we outline various routes towards meeting the fifth criteria: qubit readout.
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"abstract": "We present a scheme to perform universal quantum computation using global\naddressing techniques as applied to a physical system of endohedrally doped\nfullerenes. The system consists of an ABAB linear array of Group V endohedrally\ndoped fullerenes. Each molecule spin site consists of a nuclear spin coupled\nvia a Hyperfine interaction to an electron spin. The electron spin of each\nmolecule is in a quartet ground state $S=3/2$. Neighboring molecular electron\nspins are coupled via a magnetic dipole interaction. We find that an\nall-electron construction of a quantum cellular automata is frustrated due to\nthe degeneracy of the electronic transitions. However, we can construct a\nquantum celluar automata quantum computing architecture using these molecules\nby encoding the quantum information on the nuclear spins while using the\nelectron spins as a local bus. We deduce the NMR and ESR pulses required to\nexecute the basic cellular automata operation and obtain a rough figure of\nmerit for the the number of gate operations per decoherence time. We find that\nthis figure of merit compares well with other physical quantum computer\nproposals. We argue that the proposed architecture meets well the first four\nDiVincenzo criteria and we outline various routes towards meeting the fifth\ncriteria: qubit readout.",
"arxiv_id": "quant-ph/0210202",
"authors": [
"J. Twamley"
],
"categories": [
"quant-ph",
"cond-mat"
],
"doi": "10.1103/PhysRevA.67.052318",
"title": "Quantum cellular automata quantum computing with endohedral fullerenes",
"url": "https://arxiv.org/abs/quant-ph/0210202"
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