5. Quantum Hardware
Readouttechniques — Quiz
Test your understanding of readouttechniques with 5 practice questions.
Practice Questions
Question 1
Which metric in qubit readout quantifies the fraction of measurements that correctly assign the qubit state?
Question 2
Which amplifier uses a long Josephson-junction transmission line to provide broadband near-quantum-limited gain?
Question 3
In frequency-multiplexed dispersive readout, if each resonator has a linewidth of $5\,$MHz and requires twice this linewidth as spacing to avoid overlap, how many resonators fit in a $500\,$MHz band?
Question 4
In trapped-ion qubit readout via state-dependent fluorescence, which factor most limits the detection fidelity?
Question 5
A superconducting qubit with relaxation time $T_1=50\,\mu$s is measured for $5\,\mu$s. What is the probability of a relaxation event during measurement?