Section: Highlights of the Year

Highlights of the Year

• Pierre Rouchon was a plenary speaker at 55th IEEE Conference on Decision and Control.

• First demonstration of a quantum error correcting code extending the lifetime of a quantum bit: this experiment performed at Yale in collaboration with the team of Robert J. Schoelkopf realizes the hardware-efficient quantum error correction protocol that we had proposed a few years ago. This is the first experiment where a redundant encoding of quantum information, together with continuous measurements of an error syndrome and real-time closed-loop error corrections, extend the lifetime of the encoded information beyond the best physical part. This result was published in Nature [22].

• An experimental marriage of two central concepts of mechanics, the Schrödinger cat states and the entanglement, was realized in collaboration with the team of Robert J. Schoelkopf at Yale. Following our earlier theoretical proposals, an entangled Schrödinger cat state of light shared between two boxes (two high-Q cavities) were successfully achieved and measured. Experimental realization of such states of light were proposed more than 20 years ago and have important applications in quantum information processing. This result was published in Science [28] and has attracted important press converge around the world.

• First experimental demonstration of the quantum-state diffusion associated with spontaneous emission that triggered the field of quantum trajectories in the 1990s. This result was published in Phys. Rev. X [16]. This also led us to implement a first experimental demonstration of multi-input multi-output (MIMO) feedback in the quantum regime. This result was published in Phys. Rev. Lett. [15].