Topologically decoherence-protected qubits with trapped ions

Pérola Milman (1) , Wilfried Maineult (1) , Samuel Guibal (1) , Luca Guidoni (1) , Benoît Douçot (2) , Lev Ioffe (3) , Thomas Coudreau (1)

1 MPQ (UMR_7162) - Laboratoire Matériaux et Phénomènes Quantiques
2 LPTHE - Laboratoire de Physique Théorique et Hautes Energies
3 Center for Materials Theory [Piscataway]

We show that trapped ions can be used to simulate a highly symmetrical Hamiltonian with eingenstates naturally protected against local sources of decoherence. This Hamiltonian involves long range coupling between particles and provides a more efficient protection than nearest neighbor models discussed in previous works. Our results open the perspective of experimentally realizing in controlled atomic systems, complex entangled states with decoherence times up to nine orders of magnitude longer than isolated quantum systems.

Mots clés: trapped ions; qubits; decoherence; topological; protection

Domaines: Physique Quantique [quant-ph]; Autre [cond-mat.other]

Pérola Milman, Wilfried Maineult, Samuel Guibal, Luca Guidoni, Benoît Douçot, et al.. Topologically decoherence-protected qubits with trapped ions. Physical Review Letters, 2007, 99 (2), pp.020503. ⟨10.1103/PhysRevLett.99.020503⟩. ⟨hal-00139047v2⟩