Nonclassical correlations of photon number and field components in the vacuum state

Details Nonclassical correlations of photon number and field components in the vacuum state Nonclassical correlations of photon number and field components in the vacuum state

1999-12-15

arxiv.org/abs/quant-ph/9912072v3

Phys. Rev. A 62, 013806 (2000)

Physics

Quantum Physics

13 pages, 3 figures, corrections of omissions in equations (6) and (25). To be published in Phys. Rev. A

Scientific paper

10.1103/PhysRevA.62.013806

It is shown that the quantum jumps in the photon number n from zero to one or more photons induced by backaction evasion quantum nondemolition measurements of a quadrature component x of the vacuum light field state are strongly correlated with the quadrature component measurement results. This correlation corresponds to the operator expectation value which is equal to one fourth for the vacuum even though the photon number eigenvalue is zero. Quantum nondemolition measurements of a quadrature component can thus provide experimental evidence of the nonclassical operator ordering dependence of the correlations between photon number and field components in the vacuum state.

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