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Faculty, Perimeter Institute for Theoretical Physics
Daniel Gottesman is a faculty member at the Perimeter Institute for Theoretical Physics in Waterloo, Ontario. He received his Ph.D. from Caltech in 1997, and did postdocs at Los Alamos National Lab and Microsoft Research, after which he served in the UC Berkeley CS department as a Long-Term CMI Prize Fellow with the Clay Mathematics Institute. He works primarily on quantum error correction, fault-tolerant quantum computation, quantum cryptography, and quantum complexity. He was named to the MIT Technology Review's TR100: Top Young Innovators for 2003, and is a CIFAR Fellow in the Quantum Information Processing program.
Abstract
Interferometry among telescope arrays has become a standard technique in
astronomy, allowing greater resolving power than would be available to any
plausibly-sized single telescope. For radio frequencies, interferometry
can be performed robustly even between telescopes spread across the
planet. Interferometry between telescopes operating at infrared or
optical frequencies is also possible, but fewer photons arrive at these
high frequencies, making interferometry much more difficult. In today's
IR and optical interferometric arrays, photons arriving at different
telescopes must be physically brought together for the interference
measurement, limiting baselines to a few hundred meters at most because of
phase fluctuations and photon loss in the transmission. I will discuss
how to apply quantum repeaters to the task of optical and infrared
interferometry to allow telescope arrays with much longer baselines than
existing facilities. |
