doc: Hayk review

Co-authored-by: Hayk Sargsyan <[email protected]>

doc/source/protocols/drag/drag.rst

@@ -1,14 +1,14 @@
 DRAG experiments
 ================
 
-In this section we show how to run Ramsey experiments using Qibocal
+In this section we show how to run DRAG experiments using Qibocal
 
 .. _drag:
 
 
-DRAG :cite:p:`Motzoi_2009, Gambetta_2011`: pulses can be used to lower both phase and leakage errors,
-it consists in adding a quadrature component to the pulse which is proportional
-to the time derivative of the phase component. Given a pulse with a phase component :math:`\Omega_x`
+DRAG :cite:p:`Motzoi_2009, Gambetta_2011`: pulses can be used to lower both phase and leakage errors.
+It consists of adding a quadrature component to the pulse which is proportional
+to the time derivative of the in-phase component. Given a pulse with an in-phase component :math:`\Omega_x`
 the quadrature component :math:`\Omega_y` is evaluated as
 
 .. math::
@@ -17,15 +17,15 @@ the quadrature component :math:`\Omega_y` is evaluated as
 
 where :math:`\beta` is a scaling parameter.
 
-Qibocal provides two separate protocols to extract :math:`\beta`.
+Qibocal provides two separate protocols to calibrate :math:`\beta`.
 
 
 Method 1
 --------
 
-:math:`\beta` can be extracted by playing the pulse sequence composed by
+:math:`\beta` can be extracted by playing the pulse sequence composed of
 :math:`[R_X(\pi) - R_X(-\pi)]^N` for different values of :math:`\beta` as shown in  :cite:p:`Sheldon_2016`.
-The post-processing consists in measuring the probability of :math:`\ket{0}` for every :math:`\beta`
+The post-processing consists of measuring the probability of :math:`\ket{0}` for every :math:`\beta`
 and fitting the curve with a cosine. The correct :math:`\beta` value is the one which maximizes
 the curve.
 
@@ -58,11 +58,11 @@ Running this protocol you should get something like this:
 Method 2
 --------
 
-The second method consists in playing two different sequences
-:math:`R_Y(\pi) R_X(\pi/2)` and :math:`R_X(\pi) R_Y(\pi/2)` which are two
-of the AllXY pulses which exhibit opposite sign of phase error as highlighted
+The second method consists of playing two different sequences
+:math:`R_Y(\pi) R_X(\pi/2)` and :math:`R_X(\pi) R_Y(\pi/2)`. These are two
+of the AllXY sequences which exhibit opposite sign of phase error as highlighted
 in :cite:p:`reed2013entanglementquantumerrorcorrection`.
-The post-processing consists in measuring the probability of :math:`\ket{1}` for every :math:`\beta`
+The post-processing consists of measuring the probability of :math:`\ket{1}` for every :math:`\beta`
 and performing a linear fit for both sequences. The correct :math:`\beta` value is the one where the two lines
 cross.