• Publications
  • Influence
Optimal measurements for resolution beyond the Rayleigh limit.
We establish the conditions to attain the ultimate resolution predicted by quantum estimation theory for the case of two incoherent point sources using a linear imaging system. The solution isExpand
  • 45
  • 2
Non-negative Wigner functions for orbital angular momentum states
The Wigner function of a pure continuous-variable quantum state is non-negative if and only if the state is Gaussian. Here we show that for the canonical pair angle and angular momentum, the onlyExpand
  • 13
  • 2
  • PDF
Superiority of heterodyning over homodyning: An assessment with quadrature moments
We examine the moment-reconstruction performance of both the homodyne and heterodyne (doublehomodyne) measurement schemes for arbitrary quantum states and introduce moment estimators that optimizeExpand
  • 8
  • 2
  • PDF
Quantum Fisher information with coherence
TLDR
We find that claims about a strong enhancement of the resolution resulting from coherence effects are questionable because they refer to very small subsets of the data without proper normalization. Expand
  • 8
  • 2
  • PDF
Lossless multilayers and Lorentz transformations: more than an analogy
It is shown that the matrix describing a lossless multilayer when no total reflection occurs is an element of the group SU(1,1), which is locally isomorphic to the three-dimensional Lorentz groupExpand
  • 29
  • 1
The transfer matrix: A geometrical perspective
Abstract We present a comprehensive and self-contained discussion of the use of the transfer matrix to study propagation in one-dimensional lossless systems, including a variety of examples, such asExpand
  • 65
  • 1
  • PDF
Quantum phases of a qutrit
We consider various approaches to treat the phases of a qutrit. Although it is possible to represent qutrits in a convenient geometrical manner by resorting to a generalization of the PoincareExpand
  • 30
  • 1
  • PDF
Quantum polarization tomography of bright squeezed light
We reconstruct the polarization sector of a bright polarization squeezed beam starting from a complete set of Stokes measurements. Given the symmetry that underlies the polarization structure ofExpand
  • 31
  • 1
  • PDF
Distance-based degrees of polarization for a quantum field (7 pages)
It is well established that unpolarized light is invariant with respect to any SU(2) polarization transformation. This requirement fully characterizes the set of density matrices representingExpand
  • 39
  • 1
  • PDF
Quantum polarization properties of two-mode energy eigenstates
We show that any pure, two-mode, N-photon state with N odd or equal to two can be transformed into an orthogonal state using only linear optics. According to a recently suggested definition ofExpand
  • 33
  • 1
  • PDF