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PGI Kolloquium:

Extraordinary Lecture

Prof. Dr. Barbara Terhal,
RWTH Aachen University & Forschungszentrum Jülich, Germany

PGI Lecture Hall, Building 04.8, 2nd Floor, Room 365

15.04.2016 11:00 Uhr

Quantum Error Correction: Dream or Nightmare?

TerhalCopyright: Reprinted by permission from Macmillan Publishers Ltd: Nature Materials 14, 561–563, S. Benjamin & J. Kelly, Superconducting Qubits: Solving a wonderful problem, News & Views, copyright 2015.


We discuss the need and challenge for implementing quantum error correction in quantum information processing hardware. We illustrate the rich potential of quantum error correction by our recent proposal how one can encode and protect a qubit in a superconducting cavity mode. We demonstrate how the use of quantum error correction may not only lead to more robust qubits, but can also have applications for weak force sensing not limited by Heisenberg uncertainty.


[1] B.M. Terhal, Quantum Error Correction for Quantum Memories, Rev. Mod. Phys. 87, 307 (2015)
[2] D. Gottesman, A. Kitaev and J. Preskill, Encoding a qubit in an oscillator, Phys. Rev. A 64, 012310 (2001)
[3] B.M. Terhal and D. Weigand, Encoding a Qubit into a Cavity Mode in Circuit-QED using Phase Estimation, Phys. Rev. A 93, 012315 (2016)
[4] B.M. Terhal and K. Duivenvoorden, Single-Mode Displacement Sensor, arXiv.org: 1603.02242.


Prof. Dr. Stefan Blügel
Telefon: +49 2461 61-4249
Fax: +49 2461 61-2850
E-Mail: s.bluegel@fz-juelich.de