<s>
Stimulated	B-Algorithm
Raman	I-Algorithm
adiabatic	I-Algorithm
passage	I-Algorithm
(	O
STIRAP	B-Algorithm
)	O
is	O
a	O
process	O
that	O
permits	O
transfer	O
of	O
a	O
population	O
between	O
two	O
applicable	O
quantum	O
states	O
via	O
at	O
least	O
two	O
coherent	O
electromagnetic	O
(	O
light	O
)	O
pulses	O
.	O
</s>
<s>
These	O
light	O
pulses	O
drive	O
the	O
transitions	O
of	O
the	O
three	O
level	O
Ʌ	O
atom	B-Language
or	O
multilevel	O
system	O
.	O
</s>
<s>
Consider	O
the	O
description	O
of	O
three	O
level	O
Ʌ	O
atom	B-Language
having	O
ground	O
states	O
and	O
(	O
for	O
simplicity	O
suppose	O
that	O
the	O
energies	O
of	O
the	O
ground	O
states	O
are	O
the	O
same	O
)	O
and	O
excited	O
state	O
.	O
</s>
<s>
This	O
process	O
of	O
transforming	O
the	O
population	O
without	O
populating	O
the	O
excited	O
state	O
is	O
called	O
the	O
stimulated	B-Algorithm
Raman	I-Algorithm
adiabatic	I-Algorithm
passage	I-Algorithm
.	O
</s>
<s>
STIRAP	B-Algorithm
is	O
achieved	O
on	O
two-photon	O
resonance	O
.	O
</s>
<s>
From	O
this	O
,	O
the	O
STIRAP	B-Algorithm
counter-intuitive	O
pulse	O
sequence	O
can	O
be	O
deduced	O
.	O
</s>
