Reversible simulation of bipartite product Hamiltonians

Details Reversible simulation of bipartite product Hamiltonians Reversible simulation of bipartite product Hamiltonians

2003-03-14

arxiv.org/abs/quant-ph/0303097v1

IEEE Trans. Inf. Theory Vol. 50, No. 6, 1189-1197 (2004)

Physics

Quantum Physics

10 pages

Scientific paper

10.1109/TIT.2004.828069

Consider two quantum systems A and B interacting according to a product Hamiltonian H = H_A x H_B. We show that any two such Hamiltonians can be used to simulate each other reversibly (i.e., without efficiency losses) with the help of local unitary operations and local ancillas. Accordingly, all non-local features of a product Hamiltonian -- including the rate at which it can be used to produce entanglement, transmit classical or quantum information, or simulate other Hamiltonians -- depend only upon a single parameter. We identify this parameter and use it to obtain an explicit expression for the entanglement capacity of all product Hamiltonians. Finally, we show how the notion of simulation leads to a natural formulation of measures of the strength of a nonlocal Hamiltonian.

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