Fidelity enhancement by logical qubit encoding

Details Fidelity enhancement by logical qubit encoding Fidelity enhancement by logical qubit encoding

2007-05-28

arxiv.org/abs/0705.4119v2

Physics

Quantum Physics

10 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.99.220501

We demonstrate coherent control of two logical qubits encoded in a decoherence free subspace (DFS) of four dipolar-coupled protons in an NMR quantum information processor. A pseudo-pure fiducial state is created in the DFS, and a unitary logical qubit entangling operator evolves the system to a logical Bell state. The four-spin molecule is partially aligned by a liquid crystal solvent, which introduces strong dipolar couplings among the spins. Although the system Hamiltonian is never fully specified, we demonstrate high fidelity control over the logical degrees of freedom. In fact, the DFS encoding leads to higher fidelity control than is available in the full four-spin Hilbert space.

Affiliated with

Also associated with

No associations

Rating

Fidelity enhancement by logical qubit encoding does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Fidelity enhancement by logical qubit encoding, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fidelity enhancement by logical qubit encoding will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-498862