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related topics |
{time, wave, function} |
{spin, pulse, spins} |
{measurement, state, measurements} |
{photon, photons, single} |
{wave, scattering, interference} |
{cavity, atom, atoms} |
{cos, sin, state} |
{states, state, optimal} |
{operator, operators, space} |
{equation, function, exp} |
{observables, space, algebra} |
{force, casimir, field} |
|
Optimization of a Neutron-Spin Test of the Quantum Zeno Effect
Paolo Facchi, Yoichi Nakaguro, Hiromichi Nakazato, Saverio Pascazio, Makoto Unoki, Kazuya Yuasa
abstract: A neutron-spin experimental test of the quantum Zeno effect (QZE) is
discussed from a practical point of view, when the nonideal efficiency of the
magnetic mirrors, used for filtering the spin state, is taken into account. In
the idealized case the number N of (ideal) mirrors can be indefinitely
increased, yielding an increasingly better QZE. By contrast, in a practical
situation with imperfect mirrors, there is an optimal number of mirrors, N_opt,
at which the QZE becomes maximum: more frequent measurements would deteriorate
the performance. However, a quantitative analysis shows that a good
experimental test of the QZE is still feasible. These conclusions are of
general validity: in a realistic experiment, the presence of losses and
imperfections leads to an optimal frequency N_opt, which is in general finite.
One should not increase N beyond N_opt. A convenient formula for N_opt, valid
in a broad framework, is derived as a function of the parameters characterizing
the experimental setup.
- oai_identifier:
- oai:arXiv.org:quant-ph/0301068
- categories:
- quant-ph
- comments:
- 8 pages, 3 figures
- doi:
- 10.1103/PhysRevA.68.012107
- arxiv_id:
- quant-ph/0301068
- journal_ref:
- Phys. Rev. A 68 (2003) 012107
- created:
- 2003-01-15
Full article ▸
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