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Quantum-Dense Metrology
[article]
2012
arXiv
pre-print
Quantum metrology utilizes entanglement for improving the sensitivity of measurements. Up to now the focus has been on the measurement of just one out of two non-commuting observables. Here we demonstrate a laser interferometer that provides information about two non-commuting observables, with uncertainties below that of the meter's quantum ground state. Our experiment is a proof-of-principle of quantum dense metrology, and uses the additional information to distinguish between the actual
arXiv:1211.3570v1
fatcat:go5dld2z4fempiw5jbxi6ihaku