Intrinsic metrological resolution as a distance measure and nonclassical light

Intrinsic metrological resolution as a distance measure and nonclassical light

We elaborate on a Hilbert-Schmidt distance measure assessing the intrinsic metrological accuracy in the detection of signals imprinted on quantum probe states by signal-dependent transformations. For small signals this leads to a probe-transformation measure Λ fully symmetric on the probe ρ and the generator G of the transformation Λ(ρ,G) = Λ(G, ρ). Although Λ can be regarded as a generalizatio...

A new measure of nonclassical distance

In the present paper we shall propose a new measure of the nonclassical distance [1]. The proposed modification is based on the following considerations. If ρ1 and ρ2 are density operators, and F (ρ1, ρ2) is the corresponding fidelity, then from the inequalities [2] 2(1 − √ F (ρ1, ρ2)) ≤ ||ρ1 − ρ2||1 ≤ 2[1− (F (ρ1, ρ2))] 1 2 it is evident that the quantity φ(ρ) = sup ρcl F (ρcl, ρ) can be used ...

Revision of a fuzzy distance measure

Degree of Optimality as a Measure of Distance of Power System Operation from Optimal Operation

This paper presents an algorithm based on inter-solutions of having scheduled electricity generation resources and the fuzzy logic as a sublimation tool of outcomes obtained from the schedule inter-solutions. The goal of the algorithm is to bridge the conflicts between minimal cost and other aspects of generation. In the past, the optimal scheduling of electricity generation resources has been ...

Temperature-driven nonclassical light.

With reference to two well known scenarios, we discuss, for nonclassical light, the competition between quantum and thermal effects. It is seen that for nonclassical light to be produced some amount of temperature-induced disorder is needed plus quantum fluctuations of order ħ squared.