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 EQIS'03 TOP |
We have succeeded in constructing an ``integrated'' circuit comprising two coupled charge quantum bits (qubits). Each qubit is based on a Cooper-pair box, and coupling of the qubits is done by using a nanoscale on-chip capacitor. One pulse gate is used to manipulate two-qubit quantum states. The read-out of the circuit is done by a probe electrode attached to each qubit through a tunnel junction. The read-out signal is a pulse induced current measured in each probe. We have measured pulse-induced oscillations of probe currents in time domain and obtained a clear evidence for the interaction between the two coupled qubits.
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ERATO QCI Project HOME |
EQIS'03 TOP |