Schrödinger Cat States and Quantum Error Correction for Bosonic Modes (Prof. S. Girvin)
- Datum: 07.02.2017
- Uhrzeit: 14:30 - 15:30
- Vortragende(r): Prof. Dr. Steven Girvin, Department of Physics, Yale University, USA
- Raum: Herbert Walther Lecture Hall
- Gastgeber: MPQ
Recent remarkable experimental progress in ‘circuit QED’ now allows realization of extremely strong dispersive coupling between superconducting qubits and microwave photons in resonators.
The
resulting ‘quantum toolbox’ permits universal control of qubit and resonator
states and the ability to test new error correction codes which extend the
lifetime of quantum information stored in the collective system beyond the time
it could be stored in the best individual component of the system. Paradoxically, some of these successful codes
are based on Schrödinger cat states, normally thought to be extremely fragile
holders of quantum information. These
‘cat codes’ are members of a general class of quantum error correction codes
which store quantum information in coherent superpositions of photon Fock
states and which can survive various errors including photon loss, gain and
dephasing.