RSS icon
Twitter icon
Facebook icon
Vimeo icon
YouTube icon

Dissipation: A New Tool in Quantum Information Science

February 20, 2012 - 12:30pm
Ignacio Cirac
Max Planck Institut für Quantenoptik

Quantum Entanglement, the most striking feature of Quantum Mechanics, is also the basic ingredient in most applications in the field of Quantum Information. Unfortunately, it is very fragile: in all experiments so far the coupling of the systems to the environment has leads to dissipation which either destroys entanglement or prevents its generation. Here we propose, analyze, and demonstrate a new method to entangle two distant macroscopic atomic ensembles by purely dissipative means. This counter intuitive effect is achieved by engineering the coupling of our systems to the environment, and leads to a more robust and therefore longer lived entanglement. Apart from that, we show that engineered dissipation can be used in quantum computation and communication, as well as to create passive quantum memories and repeaters.

1201 Physics Building
College Park, MD 20742

Subscribe to A Quantum Bit 

Quantum physics began with revolutionary discoveries in the early twentieth century and continues to be central in today’s physics research. Learn about quantum physics, bit by bit. From definitions to the latest research, this is your portal. Subscribe to receive regular emails from the quantum world. Previous Issues...

Sign Up Now

Sign up to receive A Quantum Bit in your email!

 Have an idea for A Quantum Bit? Submit your suggestions to