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NEST Scientific Report 2007-2009 Interferometry and entanglement detection at the nanoscale

Summary: NEST Scientific Report 2007-2009
Interferometry and entanglement detection at the nanoscale
or many decades, interferometry has been a fundamental tool to disclose the classical
and quantum properties of light. Optical interferometry is now also at the heart of
a new quantum-based technologies with applications in metrology, imaging, and
quantum information processing. In the solid state world, controlled quantum interference
experiments appeared more recently when, thanks to the advances in fabrication, the
wavelike nature of electrons could be tested in transport measurements. The observation of
Aharonov≠Bohm oscillations in the electric current and the Landauer≠BŁttiker formulation
of quantum transport in terms of electronic transmission amplitudes signaled the beginning
of quantum electronic interferometry. In this field we have recently initiated an intense
investigation of interference effects in quantum Hall bars systems that led us to develop
a novel architecture for edge-states interferometry. Within this context, our most recent
research efforts focused on the manipulation of edge-state transport with the controlled
introduction of artificial scattering centers. Our research activicty in nanoscale-interferometry
includes also the study of interference effects for the detection of electronic entanglement
via current-noise correlations measurements, the study of excess noise and electron-electron
interactions in quantum wires, as well as the study of interterference effects in signaling


Source: Abbondandolo, Alberto - Scuola Normale Superiore of Pisa


Collections: Mathematics