Frequency Division Multiplexing Readout and Simultaneous Manipulation of
an Array of Flux Qubits
release_sm62qyv52bb7nor2ysjtemkjqu
by
Markus Jerger, Stefano Poletto, Pascal Macha, Uwe Hübner, Evgeni
Il'ichev, Alexey V. Ustinov
2012
Abstract
An important desired ingredient of superconducting quantum circuits is a
readout scheme whose complexity does not increase with the number of qubits
involved in the measurement. Here, we present a readout scheme employing a
single microwave line, which enables simultaneous readout of multiple qubits.
Consequently, scaling up superconducting qubit circuits is no longer limited by
the readout apparatus. Parallel readout of 6 flux qubits using a frequency
division multiplexing technique is demonstrated, as well as simultaneous
manipulation and time resolved measurement of 3 qubits. We discuss how this
technique can be scaled up to read out hundreds of qubits on a chip.
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