mirror of https://github.com/openqasm/openqasm.git
48 lines
1.3 KiB
Plaintext
48 lines
1.3 KiB
Plaintext
/* Measuring the relaxation time of a qubit
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* This example demonstrates the repeated use of fixed delays.
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*/
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include "stdgates.inc";
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duration stride = 1us; // time resolution of points taken
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const int[32] points = 50; // number of points taken
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const int[32] shots = 1000; // how many shots per point
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int[32] counts0;
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int[32] counts1 = 0; // surviving |1> populations of qubits
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extern tabulate(int[32], int[32], int[32]);
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bit c0;
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bit c1;
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defcalgrammar "openpulse";
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// define a gate calibration for an X gate on any qubit
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defcal x q {
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play drive(q), gaussian(100, 30, 5);
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}
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for int[32] p in [0 : points-1] {
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for uint i in [1 : shots] {
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// start of a basic block
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reset $0;
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reset $1;
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// excite qubits
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x $0;
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x $1;
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// wait for a fixed time indicated by loop counter
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delay[p * stride] $0;
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// wait for a fixed time indicated by loop counters
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delay[p * durationof({x $1;})];
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// read out qubit states
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c0 = measure $0;
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c1 = measure $1;
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// increment counts memories, if a 1 is seen
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counts0 += int[1](c0);
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counts1 += int[1](c1);
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}
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// log survival probability curve
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tabulate(counts0, shots, p);
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tabulate(counts1, shots, p);
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}
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