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Quantum Control of Light and Matter: From the Macroscopic to the Nano Scale

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Technical Report,01 May 2010,31 Oct 2015

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President and Fellows of Harvard College Cambridge United States

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We increased - by more than an order of magnitude - the storage time for coherent storage of light pulses in Bose-Einstein condensates. We can now store, sculpt, move, and revive light pulses after storage times of 0.5 minutes We observed storage of single-photon pulses in the condensates, with unprecedented long storage times and high efficiency for storage at the single photon level. The results achieved allow for powerful processing of quantum information and for distribution of entanglement over long distances, which is essential for quantum cryptography. We have built a compact system for integrating BECs with nanoscale structures and have developed new instrumentation and techniques for nano-fabrication. This has resulted in a unique e-beam ice-lithography setup that allows for non-destructive SEM imaging of carbon-based structures. We developed CVD methods for growing large, single-crystals of graphene and demonstrated graphene suspension over large apertures. This allows development of novel devices including chip-integrated devices for atom interferometry, of importance for navigation, and hybrid bio-graphene devices, incorporating enzymes positioned on graphene, for light-driven bio-fuel production with controlled enzymatic rates.

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