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Labber-software / Drivers

Instrument drivers for Labber
http://labber.org
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CPMG sequence duration scales with number of pulses #58

Closed andbe91 closed 6 years ago

andbe91 commented 6 years ago

The distance between the two pi/2 pulses is not equal to the sequence duration parameters. image

Moreover, the distance gets longer when adding pi pulses to the sequence. image

Is this the intended behavior?

simongus commented 6 years ago

It depends if you define the pulses to be “Edge-to-edge” (checkbox in the GUI), or “Center-to-center”. “Edge-to-edge” tries to make the qubit free evolution time between pulses correct (typically what you want), whereas “Center-to-center” assumes the pulses to be instantaneous.

On Dec 1, 2017, at 3:58 AM, Andreas Bengtsson notifications@github.com wrote:

The distance between the two pi/2 pulses is not equal to the sequence duration parameters. https://user-images.githubusercontent.com/23558186/33475231-f896d9b8-d67d-11e7-9e40-7b0a67e35ed0.png Moreover, the distance gets longer when adding pi pulses to the sequence. https://user-images.githubusercontent.com/23558186/33475259-1a022a30-d67e-11e7-8bae-f97a719b528f.png Is this the intended behavior?

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andbe91 commented 6 years ago

I see, thanks for the clarification. Closing this issue.