|
| related topics |
| {spin, pulse, spins} |
| {qubit, qubits, gate} |
| {trap, ion, state} |
| {group, space, representation} |
| {cavity, atom, atoms} |
| {state, states, entangled} |
| {energy, state, states} |
|
Quantum cellular automata quantum computing with endohedral fullerenes
J. Twamley
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.
- oai_identifier:
- oai:arXiv.org:quant-ph/0210202
- categories:
- quant-ph cond-mat
- comments:
- 16 pages, Latex, 5 figures, See http://planck.thphys.may.ie/QIPDDF/
submitted to Phys. Rev. A
- doi:
- 10.1103/PhysRevA.67.052318
- arxiv_id:
- quant-ph/0210202
- report_no:
- MP28-Oct-2002NUIM
- created:
- 2002-10-30
Full article ▸
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