Dernier message de la page précédente :Lisez avec soin la longue évolution de la suite de prix Nobel Kastler, Claude Cohen-Tannoudji, S. Haroche sur plus de 60 ans de recherches acharnées dans le même laboratoire,
voir wikipedia et
Ils ont été à la base de la découverte des lasers, et maintenant dans le mystère de la mécanique quantique étudiant à fond la décohérence quantique sans parvenir à observer le collapse de la fonction d'onde, mais ils ouvrent la voie pour l'ordinateur quantique, qui calculera en paralléle sur autant de micro-mondes parallèle qu'il a de qubits .
Regardez les prix Nobel de médecine !
In 2006, Serge Haroche and his ENS team have developed a super-high-Q cavity able to store
photons between mirrors for times longer than a tenth of a second. Trapping light quanta in
this cavity has allowed the ENS team to detect repeatedly and non-destructively the same
field, to project it into states with definite photon numbers (so called Fock states) and to
observe the quantum jumps of light due to the loss or gain of a single photon in the cavity
(2007). This constitutes a completely new way to look at light. Whereas photons are usually
destroyed upon measurement, they can now be counted and counted again in the cavity as one
would do with marbles in a box. This non-destructive detection method has led Serge
Haroche and his team to develop novel ways to generate and reconstruct non-classical states
of radiation trapped in a cavity and to investigate in details their decoherence, the
phenomenon essential to explain the transition from quantum to classical (2008). The ENS
team has recently pushed these experiments further by demonstrating a quantum feedback
procedure achieving the preparation of predetermined non-classical state of a field trapped in
a cavity and counteracting the effects of decoherence on these states (2011).
Many of the ideas developed by S.Haroche and his research team in microwave cavity QED
experiments have been exploited in other contexts to build new devices playing an increasing
role in opto-electronics and optical communication science. Manipulating the emission
properties of quantum dots embedded in solid state micro-cavities has become a widely
exploited method to build solid state sources and generate non classical light of various sorts.
Strong coupling of light emitters with micro-cavity structures is being developed to achieve
operations useful for quantum communication and quantum information processing purposes.
By coupling artificial atoms made of superconducting junctions with strip-line microwave
cavities, many groups word-wide are now developing a new field of physics dubbed “Circuit
QED” which borrows many of its concepts from microwave cavity QED experiments. These
examples show the impact of fundamental Cavity QED work on areas of research which
could lead to promising applications for technology.