Quantum Entanglement Distillation Using an Optical Metamaterial

Abstract

We perform an entanglement distillation protocol on pure and mixed states using optical metamaterials composed of gold nano-antennas and measure the density matrices by quantum-state tomography. The fidelity is improved from 0.85 to 0.97.

Controlling optical absorption in metamaterial absorbers for plasmonic solar cells

“…Metamaterials have shown promise as a way to engineer the optical properties of materials by manipulating the geometric parameters of subwavelength features 1 . The advent of metamaterials has provided unprecedented flexibility in manipulating light and producing new functionalities such as diffraction-unlimited imaging 2 and lithography 3 , illusion optics 4 , optical analogue simulators 5,6 , very low profile antennas 7,8 , solar photovoltaics 9,10 , metaspacers 11 , and more recently quantum information processing 12,13 . Particularly in PV, metamaterial technology offers a new degree of freedom for scientists and engineers to pursue enhancement of solar cells 14 .…”