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quant-ph2008★ 25 cited
Preparation of Decoherence Free Cluster States with Optical Superlattices
Liang Jiang, Ana Maria Rey, Oriol Romero-Isart +3
We present a protocol to prepare decoherence free cluster states using ultracold atoms loaded in a two dimensional superlattice. The superlattice geometry leads to an array of 2*2…
quant-ph2006★ 15 cited
Efficiency in Quantum Key Distribution Protocols with Entangled Gaussian States
C. Rodó, O. Romero-Isart, K. Eckert +1
Quantum key distribution (QKD) refers to specific quantum strategies which permit the secure distribution of a secret key between two parties that wish to communicate secretly. Qua…
quant-ph2006★ 50 cited
Quantum State Transfer in Spin-1 Chains
O. Romero-Isart, K. Eckert, A. Sanpera
We study the transfer of quantum information through a Heisenberg spin-1 chain prepared in its ground state. We measure the efficiency of such a quantum channel {\em via} the fidel…