We report on the theoretical and experimental progress on photonefficient quantum key distribution. We have derived theoretical bounds on the upper bound on the private capacity and developed a novel large-alphabet quantum key distribution protocol employing security through measurements in mutually unbiased bases. In experimental efforts, we advanced the photonic integrated chip architecture, including linear optics for security checks and chipintegrated high-performance single photon detectors.
We report on progress towards the goal of establishing a fundamental information-theoretic understanding of quantum secure communication and devising practical and scalable implementations of quantum key distribution protocols in a photonic integrated chip platform. The goal of this program is to experimentally and theoretically investigate the fundamental information capacity of optical communications and to develop revolutionary technology that will enable unprecedented information content, in excess of 10 bits per photon ...
The goal of this program is to establish a fundamental information-theoretic understand of quantum secure communication and to devise a practical, implementations of quantum key distribution protocols in an integrated photonic architecture. We report our progress on experimental and theoretical aspects.
This project dealt with nanofabrication by metal-trilayer evaporation and liftoff. It included fabrication of Josephson-junction structures, and development of novel methods for metal liftoff at the sub-10-nm length scale. The ultra-narrow features developed in this project also have direct relevance to the nanofabrication of nanowire phase-slip qubits, which would provide an interesting alternative approach to superconducting qubits.
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