Exact simulation of multi-qubit dynamics with only three qubits

A. Olaya-Castro, C. F. Lee, N. F. Johnson

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


We present equivalence relations which simplify the dynamics of an important class of interacting multi-qubit systems. We show that a wide class of M + 1 qubit systems, with one or M excitations, can be reduced to an equivalent n + 1 qubit system with n ≥ 2, for any M. The equivalent system faithfully reproduces the overall dynamics of the original one including the entanglement properties. In addition to its direct application to qubit-cavity systems, the formalism offers insight into a variety of situations ranging from decoherence due to a spin-bath with its own internal entanglement, through to energy transfer processes in organic systems such as biological photosynthetic units.

Original languageEnglish (US)
Pages (from-to)208-214
Number of pages7
JournalEurophysics Letters
Issue number2
StatePublished - Apr 15 2006

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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