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Christof Wunderlich

Department Physik, Naturwiss.- Techn. Fakultat, Universitat Siegen, 57068 Siegen, Germany

Friday, February 20th, 2015 at 11:30:00 AM

Conference Room Querzoli LENS

Enrico Fermi Colloquium

Published on-line at 10:29:04 AM on Monday, February 16th, 2015

MAGIC with trapped ions

Trapped atomic ions are a well-advanced physical system for investigating fundamental questions of quantum physics and for quantum information science and its a

Trapped atomic ions are a well-advanced physical system for investigating fundamental questions of quantum physics and for quantum information science and its applications. Here, the concept of magnetic gradient induced coupling (MAGIC) between trapped ions used in our investigations shall be introduced first. Then, I shall report on recent experimental progress using atomic ions confined in a Paul trap that interact via MAGIC and are coherently manipulated using exclusively radio-frequency (RF) radiation. In particular, conditional quantum gates between non-neighbouring ions and their adjustable spin-spin interaction will be presented. Addressing of individual ions in a quantum byte (eight ions) with cross-talk of order 10-5, thus allowing for fault-tolerant scaling, will be shown. Furthermore, experimental results on continuous and pulsed dynamical decoupling (DD) for protecting quantum memories and quantum gates against decoherence will be discussed. Finally, I report on using continuous DD to realize an ultrasensitive single-atom magnetometer.

For further informations, please contact Francesco Saverio Cataliotti.