Quantum dynamics as a physical resource

Abstract

How useful is a quantum dynamical operation for quantum information processing? Motivated by this question we investigate several strength measures quantifying the resources intrinsic to a quantum operation. We develop a general theory of such strength measures, based on axiomatic considerations independent of state-based resources. The power of this theory is demonstrated with applications to quantum communication complexity, quantum computational complexity, and entanglement generation by unitary operations.

19 pages, shortened by 3 pages, mainly cosmetic changes

References in corpus (3)

• A practical scheme for quantum computation with any two-qubit entangling gate
• Characterization of non-local gates
• Quantum entanglement of unitary operators on bi-partite systems

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