Quantum Field Theory Seminar
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Tue, 18/01/2011 12:00 |
Prakash Panangaden (McGill, visiting Comlab) |
Quantum Field Theory Seminar  |
L3 |
| Communication between observers in a relativistic scenario has proved to be a setting for a fruitful dialogue between quantum field theory and quantum information theory. A state that an inertial observer in Minkowski space perceives to be the vacuum will appear to an accelerating observer to be a thermal bath of radiation. We study the impact of this Davies-Fulling-Unruh noise on communication, particularly quantum communication from an inertial sender to an accelerating observer and private communication between two inertial observers in the presence of an accelerating eavesdropper. In both cases, we establish compact, tractable formulas for the associated communication capacities assuming encodings that allow a single excitation in one of a fixed number of modes per use of the communications channel. | |||
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Tue, 01/02/2011 12:00 |
Roberto Percacci (SISSA) |
Quantum Field Theory Seminar |
L3 |
| I define what it means for a quantum field theory to be asymptotically safe and discuss possible applications to theories of gravity and matter. | |||
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Tue, 15/02/2011 12:00 |
Roger Penrose |
Quantum Field Theory Seminar |
L3 |
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Tue, 01/03/2011 12:00 |
Graeme Segal |
Quantum Field Theory Seminar |
L3 |
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Fri, 11/03/2011 16:00 |
Chris Isham (Imperial College) |
Aspects of Mathematical Foundations of Physics Quantum Field Theory Seminar |
L3 |
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I will consider the physical background, and general thinking behind, the recent programme aimed at applying topos theory to the foundations of physics. |
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