15k citations
- Institute of AstronomyRU176 papers
- Centre National de la Recherche ScientifiqueFR88 papers
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- Max Planck Institute for AstronomyDE37 papers
9 papers · 2 filters
Identifying a Two-State Hamiltonian in the Presence of Decoherence
Jared H. Cole, Andrew D. Greentree, Daniel K. L. Oi +3
Mapping the system evolution of a two-state system allows the determination of the effective system Hamiltonian directly. We show how this can be achieved even if the system is dec…
Perfect State Transfer: Beyond Nearest-Neighbor Couplings
Alastair Kay
In this paper we build on the ideas presented in previous works for perfectly transferring a quantum state between opposite ends of a spin chain using a fixed Hamiltonian. While al…
Variable Bias Coin Tossing
Roger Colbeck, Adrian Kent
Alice is a charismatic quantum cryptographer who believes her parties are unmissable; Bob is a (relatively) glamorous string theorist who believes he is an indispensable guest. To…
Three-spin interactions and entanglement in optical lattices
Jiannis K. Pachos
The entanglement properties of some novel quantum systems are studied that are inspired by recent developments in cold-atom technology. A triangular optical lattice of two atomic s…
Quantum information can be negative
Michal Horodecki, Jonathan Oppenheim, Andreas Winter
Given an unknown quantum state distributed over two systems, we determine how much quantum communication is needed to transfer the full state to one system. This communication meas…
Geometric Effects and Computation in Spin Networks
Alastair Kay, Marie Ericsson
When initially introduced, a Hamiltonian that realises perfect transfer of a quantum state was found to be analogous to an x-rotation of a large spin. In this paper we extend the a…