9904011v3

related topics
{phase, path, phys}
{group, space, representation}
{qubit, qubits, gate}
{operator, operators, space}
{error, code, errors}
{state, states, entangled}
{time, decoherence, evolution}
{observables, space, algebra}
{let, theorem, proof}
{state, states, coherent}
{equation, function, exp}

Holonomic Quantum Computation

Paolo Zanardi, Mario Rasetti

abstract: We show that the notion of generalized Berry phase i.e., non-abelian holonomy, can be used for enabling quantum computation. The computational space is realized by a $n$-fold degenerate eigenspace of a family of Hamiltonians parametrized by a manifold $\cal M$. The point of $\cal M$ represents classical configuration of control fields and, for multi-partite systems, couplings between subsystem. Adiabatic loops in the control $\cal M$ induce non trivial unitary transformations on the computational space. For a generic system it is shown that this mechanism allows for universal quantum computation by composing a generic pair of loops in $\cal M.$

oai_identifier:
oai:arXiv.org:quant-ph/9904011
categories:
quant-ph hep-th
comments:
Presentation improved, accepted by Phys. Lett. A, 5 pages LaTeX, no figures
doi:
10.1016/S0375-9601(99)00803-8
arxiv_id:
quant-ph/9904011
journal_ref:
Phys.Lett. A264 (1999) 94-99
created:
1999-04-02
updated:
1999-11-15

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