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<p>La semana proxima tendremos dos coloquios, el tradicional de los jueves y uno especial el viernes,<br>
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COLOQUIOS DEL DEPARTAMENTO DE FÍSICA FCEYN - UBA<br>
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<a href="http://www.df.uba.ar" target="_blank">http://www.df.uba.ar</a><br>
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Charlas, café y masitas<br>
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En el Aula Seminario, 2do piso, Pab. I, <br>
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Jueves 29/11, 14hs:<br>
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New Frontiers in Quantum Simulation: QED and QCD with Cold Atoms and Ions<br>
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PETER ZOLLER<br>
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Institute for Theoretical Physics, University of Innsbruck<br>
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Recently, the condensed matter and atomic physics communities have mutually<br style="padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; color: rgb(51, 51, 51); font-family: Menlo, Consolas, 'Lucida Console', 'DejaVu Sans Mono', monospace; font-size: 12px; text-align: left; background-color: rgb(255, 255, 255);">
benefited from synergies emerging from the quantum simulation of strongly<br style="padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; color: rgb(51, 51, 51); font-family: Menlo, Consolas, 'Lucida Console', 'DejaVu Sans Mono', monospace; font-size: 12px; text-align: left; background-color: rgb(255, 255, 255);">
correlated systems using atomic setups. While there is presently<br style="padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; color: rgb(51, 51, 51); font-family: Menlo, Consolas, 'Lucida Console', 'DejaVu Sans Mono', monospace; font-size: 12px; text-align: left; background-color: rgb(255, 255, 255);">
significant interest in artificial gauge fields mimicking magnetic fields<br style="padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; color: rgb(51, 51, 51); font-family: Menlo, Consolas, 'Lucida Console', 'DejaVu Sans Mono', monospace; font-size: 12px; text-align: left; background-color: rgb(255, 255, 255);">
in (neutral) atom setups to observe phenomena like fractional quantum Hall<br style="padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; color: rgb(51, 51, 51); font-family: Menlo, Consolas, 'Lucida Console', 'DejaVu Sans Mono', monospace; font-size: 12px; text-align: left; background-color: rgb(255, 255, 255);">
physics, we will discuss prospects of realizing simple models of dynamical<br style="padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; color: rgb(51, 51, 51); font-family: Menlo, Consolas, 'Lucida Console', 'DejaVu Sans Mono', monospace; font-size: 12px; text-align: left; background-color: rgb(255, 255, 255);">
gauge fields (lattice gauge theories) as a next generation of possible cold<br style="padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; color: rgb(51, 51, 51); font-family: Menlo, Consolas, 'Lucida Console', 'DejaVu Sans Mono', monospace; font-size: 12px; text-align: left; background-color: rgb(255, 255, 255);">
atom experiments, where the (very) long term goal is to develop atomic<br style="padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; color: rgb(51, 51, 51); font-family: Menlo, Consolas, 'Lucida Console', 'DejaVu Sans Mono', monospace; font-size: 12px; text-align: left; background-color: rgb(255, 255, 255);">
quantum simulators for QED and QCD.<br>
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=================================================================<br>
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En el Aula 3, 1er piso, Pab. I<br>
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Viernes 30/11, 14hs, <br>
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From Einstein's intuition to quantum bits: a new quantum age<br>
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ALAIN ASPECT<br>
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Laboratoire Charles Fabry, Institute d'Optique, CNRS, France<br>
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In 1935, with co-authors Podolsky and Rosen, Einstein discovered an amazing<br style="padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; color: rgb(51, 51, 51); font-family: Menlo, Consolas, 'Lucida Console', 'DejaVu Sans Mono', monospace; font-size: 12px; text-align: left; background-color: rgb(255, 255, 255);">
quantum situation, where particles in a pair are so strongly correlated<br style="padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; color: rgb(51, 51, 51); font-family: Menlo, Consolas, 'Lucida Console', 'DejaVu Sans Mono', monospace; font-size: 12px; text-align: left; background-color: rgb(255, 255, 255);">
that Schrödinger called them "entangled". By analysing that situation,<br style="padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; color: rgb(51, 51, 51); font-family: Menlo, Consolas, 'Lucida Console', 'DejaVu Sans Mono', monospace; font-size: 12px; text-align: left; background-color: rgb(255, 255, 255);">
Einstein concluded that the quantum formalism was incomplete. Niels Bohr<br style="padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; color: rgb(51, 51, 51); font-family: Menlo, Consolas, 'Lucida Console', 'DejaVu Sans Mono', monospace; font-size: 12px; text-align: left; background-color: rgb(255, 255, 255);">
immediately opposed that conclusion, and the debate lasted until the death<br style="padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; color: rgb(51, 51, 51); font-family: Menlo, Consolas, 'Lucida Console', 'DejaVu Sans Mono', monospace; font-size: 12px; text-align: left; background-color: rgb(255, 255, 255);">
of these two giants of physics, in the 1950's.<br style="padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; color: rgb(51, 51, 51); font-family: Menlo, Consolas, 'Lucida Console', 'DejaVu Sans Mono', monospace; font-size: 12px; text-align: left; background-color: rgb(255, 255, 255);">
In 1964, John Bell produced his famous inequalities, which allowed<br style="padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; color: rgb(51, 51, 51); font-family: Menlo, Consolas, 'Lucida Console', 'DejaVu Sans Mono', monospace; font-size: 12px; text-align: left; background-color: rgb(255, 255, 255);">
experimentalists to settle the debate, and to show that the revolutionary<br style="padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; color: rgb(51, 51, 51); font-family: Menlo, Consolas, 'Lucida Console', 'DejaVu Sans Mono', monospace; font-size: 12px; text-align: left; background-color: rgb(255, 255, 255);">
concept of entanglement is indeed a reality.<br style="padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; color: rgb(51, 51, 51); font-family: Menlo, Consolas, 'Lucida Console', 'DejaVu Sans Mono', monospace; font-size: 12px; text-align: left; background-color: rgb(255, 255, 255);">
Based on that concept, a new field of research has emerged, quantum<br style="padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; color: rgb(51, 51, 51); font-family: Menlo, Consolas, 'Lucida Console', 'DejaVu Sans Mono', monospace; font-size: 12px; text-align: left; background-color: rgb(255, 255, 255);">
information, where one uses quantum bits, the so-called "qubits". In<br style="padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; color: rgb(51, 51, 51); font-family: Menlo, Consolas, 'Lucida Console', 'DejaVu Sans Mono', monospace; font-size: 12px; text-align: left; background-color: rgb(255, 255, 255);">
contrast to classical bits which are either in state 0 or state 1, qubits<br style="padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; color: rgb(51, 51, 51); font-family: Menlo, Consolas, 'Lucida Console', 'DejaVu Sans Mono', monospace; font-size: 12px; text-align: left; background-color: rgb(255, 255, 255);">
can be simultaneously in state 0 and state 1, as a Schrödinger cat could be<br style="padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; color: rgb(51, 51, 51); font-family: Menlo, Consolas, 'Lucida Console', 'DejaVu Sans Mono', monospace; font-size: 12px; text-align: left; background-color: rgb(255, 255, 255);">
simultaneously dead and alive.<br style="padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; color: rgb(51, 51, 51); font-family: Menlo, Consolas, 'Lucida Console', 'DejaVu Sans Mono', monospace; font-size: 12px; text-align: left; background-color: rgb(255, 255, 255);">
Entanglement between qubits enables conceptually new methods for processing<br style="padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; color: rgb(51, 51, 51); font-family: Menlo, Consolas, 'Lucida Console', 'DejaVu Sans Mono', monospace; font-size: 12px; text-align: left; background-color: rgb(255, 255, 255);">
and transmitting information. Large scale practical implementation of such<br style="padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; color: rgb(51, 51, 51); font-family: Menlo, Consolas, 'Lucida Console', 'DejaVu Sans Mono', monospace; font-size: 12px; text-align: left; background-color: rgb(255, 255, 255);">
concepts might revolutionize our society, as did the laser, the transistor<br style="padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; color: rgb(51, 51, 51); font-family: Menlo, Consolas, 'Lucida Console', 'DejaVu Sans Mono', monospace; font-size: 12px; text-align: left; background-color: rgb(255, 255, 255);">
and integrated circuits, some of the most striking fruits of the first<br style="padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; color: rgb(51, 51, 51); font-family: Menlo, Consolas, 'Lucida Console', 'DejaVu Sans Mono', monospace; font-size: 12px; text-align: left; background-color: rgb(255, 255, 255);">
quantum revolution, which began with the 20th century.</p>
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