Optomechanical Micro-Macro Entanglement
Physical Review Letters American Physical Society (APS) 112:8 (2014) 080503
Distillation of the two-mode squeezed state.
Physical review letters 112:7 (2014) 070402
Abstract:
We experimentally demonstrate entanglement distillation of the two-mode squeezed state obtained by parametric down-conversion. Applying the photon annihilation operator to both modes, we raise the fraction of the photon-pair component in the state, resulting in the increase of both squeezing and entanglement by about 50%. Because of the low amount of initial squeezing, the distilled state does not experience significant loss of Gaussian character.Observation of micro–macro entanglement of light
Nature Physics Springer Nature 9:9 (2013) 541-544
Creating and detecting micro-macro photon-number entanglement by amplifying and deamplifying a single-photon entangled state.
Physical review letters 110:17 (2013) 170406
Abstract:
We propose a scheme for the observation of micro-macro entanglement in photon number based on amplifying and deamplifying a single-photon entangled state in combination with homodyne quantum state tomography. The created micro-macro entangled state, which exists between the amplification and deamplification steps, is a superposition of two components with mean photon numbers that differ by approximately a factor of three. We show that for reasonable values of photon loss it should be possible to detect micro-macro photon-number entanglement where the macrosystem has a mean number of one hundred photons or more.Experimental characterization of bosonic creation and annihilation operators.
Physical review letters 110:13 (2013) 130403