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Colloquium: Quantum-limited measurements: One physicist's crooked path from relativity theory to quantum optics to quantum information

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Carlton Caves, University of New Mexico
When
20 September 2018 from 3:45 PM to 4:45 PM
Where
117 Osmond Laboratory
Contact Name
Sathyaprakash
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Quantum information science has changed our view of quantum

mechanics. Originally viewed as a nag, whose uncertainty principles

restrict what we can do, quantum mechanics is now seen as a

liberator, allowing us to do things, such as secure key

distribution and efficient computations, that could not be done in

the realistic world of classical physics. Yet there is one area,

that of quantum limits on high-precision measurements, where the

two faces of quantum mechanics remain locked in battle. I will

trace the history of quantum-limited measurements, from the use of

nonclassical light to improve the phase sensitivity of an

interferometer, to the modern perspective on the role of

entanglement in improving measurement precision.

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