Download Information quantique

2nd semestre 2014-2015
Information quantique
Enseignants
Jakob REICHEL
Chargé de TD
Christine GUERLIN
Physique de la matière condensée
Option
Physique macroscopique et
complexité (ex physique des
liquides)
Option
Physique quantique
Option
Physique théorique
Option
ECTS
3
Langue d’enseignement
Anglais
Site web
Description
Progress in experimental quantum physics has transformed thought experiments into reality,
so that an exciting new question can now be asked : How can we harness the "strange"
features of quantum mechanics - such as nonlocality, entanglement, and quantum
measurement - in new applications ? In this new field, broadly called “quantum technologies”,
new ideas and concepts are being put forward.
Today, the most active ones are Quantum metrology, where multiparticle entangled quantum
states are employed to improve high-resolution measurements, for example in an atomic
clock. Quantum cryptography, where the use of quantum objects (typically photons) as
information carriers makes it possible to detect eavesdroppers due to fundamental
measurement back-action. Quantum computing, where qubits replace classical bits. For some
specific algorithms, “quantum parallelism” can actually lead to a fundamentally faster
performance than the best known classical algorithms. Quantum simulations, where a wellcontrolled quantum system is designed to obey the Hamiltonian of a fundamental problem,
often from solid-state physics, which cannot be studied in its original system due to lack of
control (impurities, small scale...), nor simulated on a classical computer due to its
complexity.
In all of these subjects, the relation between quantum physics and information plays a
profound role. The course will tackle fundamental concepts as well as examples. In each
lecture, discussion of experiments from various fields (trapped ions, ultracold atoms,
superconducting circuits, ...) will complement the theoretical description.