9907101v1

related topics
{states, state, optimal}
{group, space, representation}
{operator, operators, space}
{state, states, coherent}
{let, theorem, proof}
{spin, pulse, spins}
{measurement, state, measurements}
{cos, sin, state}
{energy, state, states}
{classical, space, random}

Expanding Hermitean Operators in a Basis of Projectors on Coherent Spin States

Stefan Weigert

abstract: The expectation values of a hermitean operator A in (2s+1)(2s+1) specific coherent states of a spin are known to determine the operator unambiguously. As shown here, (almost) any other (2s+1)(2s+1) coherent states also provide a basis for self-adjoint operators. This is proven by considering the determinant of the Gram matrix associated with the coherent state projectors as a Hamiltonian of a fictitious classical spin system.

oai_identifier:
oai:arXiv.org:quant-ph/9907101
categories:
quant-ph
comments:
Latex2e, 4 pages
arxiv_id:
quant-ph/9907101
journal_ref:
J. Opt. B 56 (2004) 489
created:
1999-07-30

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