new_cpmg_sequence

qctrlopencontrols.new_cpmg_sequence(duration, offset_count, pre_post_rotation=False, name=None)

Creates the Carr-Purcell-Meiboom-Gill sequence.

Parameters

duration (float) – Total duration of the sequence $\tau$ (in seconds).
offset_count (int) – Number of offsets $n$ .
pre_post_rotation (bool , optional) – If True, a $X_{\pi/2}$ rotation is added at the start and end of the sequence. Defaults to False.
name (string , optional) – Name of the sequence. Defaults to None.

The Carr-Purcell-Meiboom-Gill sequence ¹ has the same timing and number of offsets as the Carr-Purcell sequence. However, the intermediate $\pi$ rotations are applied along the $Y$ axis. That is, it consists of $Y_{\pi}$ operations applied at times

t_i = \frac{\tau}{n} \left(i - \frac{1}{2}\right) \;,

where $i = 1, \cdots, n$ .

References

[1] S. Meiboom and D. Gill, Review of Scientific Instruments 29:8, 688 (1958).

Parameters

Returns

Return type

SEE ALSO

Notes

References