Single trapped ions represent elementary quantum systems that are well isolated from the
environment. They can be brought nearly to rest by laser cooling, and both their internal …

This review covers recent theoretical and experimental efforts to extend the application of
the continuous-variable quantum technology of light beyond" Gaussian" quantum states …

An algorithm for quantum-state estimation based on the maximum-likelihood estimation is
proposed. Existing techniques for state reconstruction based on the inversion of measured …

We describe how a quantum system composed of a cavity field interacting with a movable
mirror can be utilized to generate a large variety of nonclassical states of both the cavity field …

We reconstruct the density matrices and Wigner functions for various quantum states of
motion of a harmonically bound 9 Be+ ion. We apply coherent displacements of different …

Recent work by Lundeen et al.[Nature (London) 474, 188 (2011) NATUAS 0028-0836
10.1038/nature10120] directly measured the wave function by weakly measuring a variable …

We show that the Wigner function corresponding to an electromagnetic field in a cavity or a
vibronic state of a trapped ion can be directly measured by means of a simple experimental …

We have measured the complete Wigner function W of the vacuum and of a single-photon
state for a field stored in a high-Q cavity. This experiment implements the direct Lutterbach …

We propose an experimental scheme for testing nonlocality of a correlated two-mode
quantum state of light. We show that the correlation functions violating the Bell inequalities in …

We demonstrate that the Wigner function of the Einstein-Podolsky-Rosen state, though
positive definite, provides direct evidence of the nonlocal character of this state. The proof is …