8,039 research outputs found
Optimal fast single pulse readout of qubits
The computer simulations of the process of single pulse readout from the
flux-biased phase qubit is performed in the frame of one-dimensional
Schroedinger equation. It has been demonstrated that the readout error can be
minimized by choosing the optimal pulse duration and the depth of a potential
well, leading to the fidelity of 0.94 for 2ns and 0.965 for 12ns sinusoidal
pulses.Comment: 4 pages, 6 figure
Fine tuning of phase qubit parameters for optimization of fast single-pulse readout
We analyze a two-level quantum system, describing the phase qubit, during a
single-pulse readout process by a numerical solution of the time-dependent
Schroedinger equation. It has been demonstrated that the readout error has a
minimum for certain values of the system`s basic parameters. In particular, the
optimization of the qubit capacitance and the readout pulse shape leads to
significant reduction of the readout error. It is shown that in an ideal case
the fidelity can be increased to almost 97% for 2 ns pulse duration and to 96%
for 1 ns pulse duration.Comment: 4 pages, 5 figure
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