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Readout for phase qubits without Josephson junctions
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DOI：10.1063/1.3354089.png)
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Abstract
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We present a readout scheme for phase qubits which eliminates the read-out superconducting quantum interference device so that the entire qubit and measurement circuitry only require a single Josephson junction. Our scheme capacitively couples the phase qubit directly to a transmission line and detects its state after the measurement pulse by determining a frequency shift observable in the forward scattering parameter of the readout microwaves. This readout is extendable to multiple phase qubits coupled to a common readout line and can in principle be used for other flux biased qubits having two quasistable readout configurations. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3354089]
Keywords:
QUANTUM STATES
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