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SUMMARY:Extending the life of quantum information with smart control schem
 es - Ed Barnes
DTSTART:20190905T103000Z
DTEND:20190905T113000Z
UID:TALK129721@talks.cam.ac.uk
CONTACT:Olivia Matthewson
DESCRIPTION:Future technologies such as quantum computing\, sensing and co
 mmunication demand the ability to control microscopic quantum systems with
  unprecedented accuracy. This task is particularly daunting due to unwante
 d and unavoidable interactions with noisy environments that destroy quantu
 m information through decoherence. I will present recent progress in under
 standing and modeling the effects of noise on the dynamics of a qubit and 
 show how this can be used to develop new ways to slow down decoherence. I 
 will then describe a new general theory for dynamically combatting decoher
 ence by driving qubits in such a way that noise effects destructively inte
 rfere and cancel out. This theory exploits a rich geometrical structure hi
 dden within the time-dependent Schrödinger equation.
LOCATION:Rutherford Seminar Room B (Room 980)
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