Implementation of NMR quantum computation with parahydrogen-derived high-purity quantum states

Quantum Computation with NMR

A novice seeking to understand Nuclear Magnetic Resonance Quantum Computation (NMR QC) faces a formidable task. Not only is it necessary to master two new fields (NMR and QC), but many of the early papers in the field are unusually difficult to understand. Part of this opacity is, no doubt, due to the speed with which the early manuscripts were written, but an even more important cause was the ...

Geometric Quantum Computation with NMR

Jonathan A. Jones, Vlatko Vedral, Artur Ekert and Giuseppe Castagnoli Centre for Quantum Computation, Clarendon Laboratory, Parks Road, Oxford OX1 3PU, UK OCMS, New Chemistry Laboratory, South Parks Road, Oxford OX1 3QT, UK Elsag,Via Puccini 2, 1615 Genova, Italy (February 29, 2008) An exciting recent development has been the discovery that the computational power of quantum computers exceeds t...

Scalable NMR Quantum Computation

Nuclear magnetic resonance offers an appealing prospect for implementation of quantum computers, because of the long coherence times associated with nuclear spins, and extensive laboratory experience in manipulating the spins with radio frequency pulses. Existing proposals, however, suffer from a signal-to-noise ratio that decays exponentially in the number of qubits in the quantum computer. Th...

NMR Quantum Computation

NMR Implementation of a Building Block for Scalable Quantum Computation

We report the implementation of the central building block of the Schulman-Vazirani procedure for fully polarizing a subset of two-level quantum systems which are initially only partially polarized. This procedure consists of a sequence of unitary operations and incurs only a quasi-linear overhead in the number of quantum systems and operations required. The key building block involves three qu...