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ters read from different sub-directories in the Registry. The “Run”-Settings can
therefore be written in a way that is independent of the number of qubits that
are being used, providing for maximum scalability of the experiment.
7.5.11 Qubit Bias Server
To assist the Experiment Servers in preparing and running an experiment, the
Qubit Bias Server provides Settings to set up common parts of the experimental
sequences with the Qubit Server.
Specifically, it provides a Setting that uses
parameters stored in the Registry to generate the flux bias sequence necessary to
reset each of the involved qubits and set them to their respective operating biases.
Another Setting sets the flux biases to the respective readout bias and executes
the necessary squid ramps in the correct order to read out all qubits. Using these
two Settings, the only thing that a typical Experiment Server has to do is to
configure the high-speed microwave, Z-, and measure pulses and to analyze the
resulting timing data in the appropriate way.
7.5.12 Qubit Server
Both the Experiment Servers and the Qubit Bias Server perform their functions
via calls to the Qubit Server. This Server maintains a list of all qubits with their
respective hardware hook-ups. For example, it knows which GHz DAC boards
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