ar X iv : 0 70 7 . 01 49 v 1 [ qu an t - ph ] 2 J ul 2 00 7 Experimental demonstration of continuous variable purification of squeezed states
نویسندگان
چکیده
We report on the first experimental demonstration of purification of nonclassical continous variable states. The protocol uses two copies of phase-diffused states overlapped on a beam splitter and provides Gaussified, less mixed states with the degree of squeezing improved. The protocol uses only linear optical devices such as beam splitters and homodyne detection, thereby proving these optical elements can be used for successful purification of this type of state decoherence which occurs in optical transmission channels.
منابع مشابه
ar X iv : 0 80 7 . 14 46 v 1 [ qu an t - ph ] 9 J ul 2 00 8 Electronic noise - free measurements of squeezed light Leonid
We study the implementation of a correlation measurement technique for the characterization of squeezed light. We show that the sign of the covariance coefficient revealed from the time resolved correlation data allow us to distinguish between squeezed, coherent and thermal states. In contrast to the traditional method of characterizing squeezed light, involving measurement of the variation of ...
متن کاملar X iv : 0 70 7 . 03 46 v 1 [ m at h - ph ] 3 J ul 2 00 7 THE ONE - DIMENSIONAL SCHRÖDINGER - NEWTON EQUATIONS
We prove an existence and uniqueness result for ground states of one-dimensional Schrödinger-Newton equations.
متن کاملar X iv : 1 10 3 . 28 36 v 2 [ qu an t - ph ] 1 7 M ar 2 01 1 Coupled - resonator - induced transparency with a squeezed vacuum
We present the first experimental observation of quantum fluctuation spectra in two coupled optical cavities with an injected squeezed vacuum light. The quadrature components of the reflected squeezed vacuum spectra are measured by phase sensitive homodyne detector. The experimental results demonstrate coupled-resonator-induced transparency in the quantum regime, in which electromagnetically-in...
متن کاملar X iv : 0 70 6 . 02 37 v 1 [ qu an t - ph ] 1 J un 2 00 7 Quantum Mechanics in Phase Space
In this paper, I am presenting the basics of the Wigner formulation of Quantum-Mechanics in a very simple language and write about few interpretational stuff raised around it.
متن کاملar X iv : 0 70 8 . 29 64 v 1 [ qu an t - ph ] 2 2 A ug 2 00 7 General multipartite entangled states and complex projective variety
We discuss and investigate the geometrical structure of general multipartite states. In particular, we show that a geometrical measure of entanglement for general multipartite states can be constructed by the complex projective varieties defined by quadratic polynomials.
متن کامل