Quantum oscillations in two coupled charge qubits

Details Quantum oscillations in two coupled charge qubits Quantum oscillations in two coupled charge qubits

2002-12-13

arxiv.org/abs/cond-mat/0212314v1

Nature 421, 823 (2003)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures, submitted to Nature

Scientific paper

10.1038/nature01365

Despite an apparent progress in implementing individual solid-state qubits, there have been no experimental reports so far on multi-bit gates required for building a real quantum computer. Here we report a new circuit comprising two coupled charge qubits. Using a pulse technique, we coherently mix quantum states and observe quantum oscillations whose spectrum reflects interaction between the qubits. Our results demonstrate the feasibility of coupling of multiple solid-state qubits and indicate the existence of entangled two-qubit states.

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