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Jon Elster
Reason and reasons
Jon Elster
Reason and reasons
Opening lecture
Event
Abstract The same Latin word, ratio , is at the root of two intellectual traditions that are at once very different and interlinked. For moralists, reason has always been opposed to passions and, for modernists, to interests. For modern economists, on the …
18:00 to 19:00
News
The Collège de France is delighted to announce the success in the 2017 ERC Advanced Grants program of Professors Philippe Aghion, Hughes de Thé and Thomas Lecuit, who respectively hold the "Economics of Institutions, Innovation and Growth", "Cellular and …
Published on 16 April 2018
Event
Abstract The sixth lesson continued the description of trapped ion entanglement experiments. The definition of GHZ and W states was given, as well as an analysis of the decoherence of these states by unread measurement of one of the ions. We have …
09:30 to 10:30
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Abstract The fifth lesson dealt with the precise description of quantum logic operations with trapped ions. We recalled the definition of phase and control-not gates and the link between them. We explained the principle of the Cirac and Zoller gate and …
09:30 to 10:30
Event
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14:30 to 15:30
Event
Abstract In the fourth lesson, we showed how to excite and detect coherent states of ion motion in a harmonic trap. We analyzed the Rabi oscillations of an ion in a coherent state and, in this context, rediscovered the phenomenon of signal collapse and …
09:30 to 10:30
Event
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14:30 to 15:30
Arno Rauschenbeutel
From observing individual neutral atoms to processing quantum information
Arno Rauschenbeutel
From observing individual neutral atoms to processing quantum information
Seminar
Event
11:00 to 12:00
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Abstract The third lesson began with a description of other laser cooling methods, adapted to a few special cases ( Beryllium Raman sideband cooling and information acquisition cooling (stochastic method). We then set out to describe in detail the …
09:30 to 10:30
Event
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14:30 to 15:30
Event
Abstract In the second lesson, we began to describe the methods used to manipulate ions trapped in quantum information. We analyzed the properties of the quadrupole Paul trap and showed how it is possible to separate micro- and macro-movements in the …
09:30 to 10:30
Event
11:00 to 12:00
Event
Abstract The first lesson presented the principle of realizing one- or two-qubit quantum gates on a system of ions with two electronic levels trapped in a harmonic potential. We noted the analogy of this system with that of cavity electrodynamics dealt …
09:30 to 10:30
Event
17:00 to 18:00
Series
Why focus on writing and try to define the concept of writing? I'll answer straight away: as far as I'm concerned, if I have to pass judgment on a score, on a composer, it's the essential criterion that determines me. A composer may or may not know how to …