ar 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

ar X iv : 1 20 2 . 16 82 v 1 [ qu an t - ph ] 8 F eb 2 01 2 Super - bunched bright squeezed vacuum state

In this paper we experimentally study the statistical properties of a bright squeezed vacuum state containing up to 10 photons per mode (10 μJ per pulse), produced via high gain parametric down conversion (PDC). The effects of bunching and superbunching of photons were observed for a single mode PDC radiation by second-order intensity correlation function measurements with analog detectors. c ©...

ar X iv : 1 11 1 . 37 97 v 1 [ qu an t - ph ] 1 6 N ov 2 01 1 Prony ’ s method and the connected – moments expansion

ar X iv : 1 40 3 . 36 47 v 1 [ qu an t - ph ] 1 4 M ar 2 01 4 Heisenberg Limit Superradiant Super - resolving Metrology

We propose a superradiant metrology scheme to achieve Heisenberg limit super-resolving displacement measurement by encoding multiple light momenta into a three-level atomic ensemble. We use 2N coherent pulses to prepare a single excitation superradiant state in a superposition of two timed Dicke states that are 4N light momenta apart in the momentum space. The phase difference between these two...

ar X iv : 1 00 3 . 04 24 v 2 [ qu an t - ph ] 5 J ul 2 01 0 Cold - atom induced control of an opto - mechanical device

M. Paternostro, G. De Chiara, and G. M. Palma School of Mathematics and Physics, Queen’s University, Belfast BT7 1NN, United Kingdom Grup de Fı́sica Teòrica, Departament de Fı́sica, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain NEST-INFM (CNR) and Dipartimento di Scienze Fisiche ed Astronomiche, Università degli Studi di Palermo, Via Archirafi 36, I-90123 Palermo, Italy (Dated: Jul...

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

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...