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Quantum Ratchets for Quantum Communication with Optical Superlattices
Oriol Romero-Isart, Juan Jose Garcia-Ripoll
We propose to use a quantum ratchet to transport quantum information in a chain of atoms trapped in an optical superlattice. The quantum ratchet is created by a continuous modulati…
Chiral entanglement in triangular lattice models
D. I. Tsomokos, J. J. Garcia-Ripoll, N. R. Cooper +1
We consider the low energy spectrum of spin-1/2 two-dimensional triangular lattice models subject to a ferromagnetic Heisenberg interaction and a three spin chiral interaction of v…
Coherent control of trapped ions using off-resonant lasers
J. J. Garcia-Ripoll, P. Zoller, J. I. Cirac
In this paper we develop a unified framework to study the coherent control of trapped ions subject to state-dependent forces. Taking different limits in our theory, we can reproduc…
Fast and robust two-qubit gates for scalable ion trap quantum computing
J. J. Garcia-Ripoll, P. Zoller, J. I. Cirac
We propose a new concept for a two-qubit gate operating on a pair of trapped ions based on laser coherent control techniques. The gate is insensitive to the temperature of the ions…
Quantum computation with unknown parameters
J. J. Garcia-Ripoll, J. I. Cirac
We show how it is possible to realize quantum computations on a system in which most of the parameters are practically unknown. We illustrate our results with a novel implementatio…