Simulation of many-body interactions by conditional geometric phases

Details Simulation of many-body interactions by conditional geometric phases Simulation of many-body interactions by conditional geometric phases

2001-11-02

arxiv.org/abs/quant-ph/0111017v3

Phys. Rev. A 65, 032327 (2002)

Physics

Quantum Physics

8 pages, no figures, some references are added and the revised version submitted to PRA

Scientific paper

10.1103/PhysRevA.65.032327

It is shown how to exactly simulate many-body interactions and multi-qubit gates by coupling finite dimensional systems, e.g., qubits with a continuous variable. Cyclic evolution in the phase space of such a variable gives rise to a geometric phase, depending on a product of commuting operators. The latter allows to simulate many-body Hamiltonians and nonlinear Hamiltonians, and to implement a big variety of multi-qubit quantum gates on both qubits and encoded qubits. An application to the quantum amplitude amplification algorithm will be discussed.

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