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4 papers · 2 filters
Error free quantum communication through noisy channels
Anders Soerensen, Klaus Moelmer
We suggest a method to perform a quantum logic gate between distant qubits by off-resonant field-atom dispersive interactions. The scheme we present is shown to work ideally even i…
Multi-particle entanglement of hot trapped ions
Klaus Molmer, Anders Sorensen
We propose an efficient method to produce multi-particle entangled states of ions in an ion trap for which a wide range of interesting effects and applications have been suggested.…
Quantum computation with ions in thermal motion
Anders Sorensen, Klaus Molmer
We propose an implementation of quantum logic gates via virtual vibrational excitations in an ion trap quantum computer. Transition paths involving unpopulated, vibrational states…
Fisher information in quantum statistics
O. E. Barndorff-Nielsen, R. D. Gill
Braunstein and Caves (1994) proposed to use Helstrom's {\em quantum information} number to define, meaningfully, a metric on the set of all possible states of a given quantum syste…