Rabi oscillations of pinned solitons in spin chains: A route to quantum computation and communication

S. Bertaina (1) , C.-E. Dutoit (1) , J. van Tol (2) , M. Dressel (3) , B. Barbara (4) , A. Stepanov (1)

1 IM2NP - Institut des Matériaux, de Microélectronique et des Nanosciences de Provence
2 NHMFL - National High Magnetic Field Laboratory
3 Pfaffenwaldring 57, D–70550 Stuttgart, Germany - Physikalisches Institut [Stuttgart]
4 NEEL - QuantECA - Circuits électroniques quantiques Alpes

We provide the first evidence for coherence and Rabi oscillations of spin-solitons pinned by the local breaking of translational symmetry in isotropic Heisenberg chains (simple antiferromagnetic-N\'{e}el or spin-Peierls).We show that these correlated spin systems made of hundreds of coupled spin bear an overall spin S=1/2 and can be manipulated as a single spin. This is clearly contrary to all known spin-qubits which are paramagnetic centres, highly diluted to prevent decoherence. These results offer an alternative approach for spin-qubits paving the way for the implementation of a new type of quantum computer.

Mots clés: qubit; EPR; fermion; soliton

Domaines: Electrons fortement corrélés [cond-mat.str-el]; Matière Condensée [cond-mat]

S. Bertaina, C.-E. Dutoit, J. van Tol, M. Dressel, B. Barbara, et al.. Rabi oscillations of pinned solitons in spin chains: A route to quantum computation and communication. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2014, 90 (6), pp.060404(R). ⟨10.1103/PhysRevB.90.060404⟩. ⟨hal-00950864v2⟩