<s>
QuTiP	B-Algorithm
,	O
short	O
for	O
the	O
Quantum	B-Algorithm
Toolbox	I-Algorithm
in	I-Algorithm
Python	I-Algorithm
,	O
is	O
an	O
open-source	B-Application
computational	B-Algorithm
physics	I-Algorithm
software	B-Library
library	I-Library
for	O
simulating	B-Device
quantum	I-Device
systems	I-Device
,	O
particularly	O
open	O
quantum	O
systems	O
.	O
</s>
<s>
QuTiP	B-Algorithm
allows	O
simulation	O
of	O
Hamiltonians	O
with	O
arbitrary	O
time-dependence	O
,	O
allowing	O
simulation	O
of	O
situations	O
of	O
interest	O
in	O
quantum	O
optics	O
,	O
ion	O
trapping	O
,	O
superconducting	O
circuits	O
and	O
quantum	O
nanomechanical	O
resonators	O
.	O
</s>
<s>
The	O
library	B-Library
includes	O
extensive	O
visualization	B-Application
facilities	O
for	O
content	O
under	O
simulations	O
.	O
</s>
<s>
QuTiP	B-Algorithm
's	O
API	O
provides	O
a	O
Python	B-Language
interface	O
and	O
uses	O
Cython	B-Application
to	O
allow	O
run-time	O
compilation	O
and	O
extensions	O
via	O
C	B-Language
and	O
C++	B-Language
.	O
</s>
<s>
QuTiP	B-Algorithm
is	O
built	O
to	O
work	O
well	O
with	O
popular	O
Python	B-Language
packages	O
NumPy	B-Application
,	O
SciPy	B-Application
,	O
Matplotlib	B-Language
and	O
IPython	B-Application
.	O
</s>
<s>
The	O
idea	O
for	O
the	O
QuTip	B-Algorithm
project	O
was	O
conceived	O
in	O
2010	O
by	O
PhD	O
student	O
Paul	O
Nation	O
,	O
who	O
was	O
using	O
the	O
quantum	O
optics	O
toolbox	O
for	O
MATLAB	B-Language
in	O
his	O
research	O
.	O
</s>
<s>
According	O
to	O
Paul	O
Nation	O
,	O
he	O
wanted	O
to	O
create	O
a	O
python	B-Language
package	O
similar	O
to	O
qotoolbox	O
because	O
he	O
"	O
was	O
not	O
a	O
big	O
fan	O
of	O
MATLAB	B-Language
"	O
and	O
then	O
decided	O
to	O
"	O
just	O
write	O
it	O
[him]self	O
 "	O
.	O
</s>
<s>
In	O
contrast	O
to	O
its	O
predecessor	O
qotoolbox	O
,	O
which	O
relies	O
on	O
the	O
proprietary	O
MATLAB	B-Language
environment	O
,	O
it	O
was	O
published	O
in	O
2012	O
under	O
an	O
open	O
source	O
license	O
.	O
</s>
<s>
The	O
Version	O
created	O
by	O
Nation	O
and	O
Johansson	O
already	O
contained	O
the	O
most	O
important	O
features	O
of	O
the	O
package	O
,	O
but	O
QuTips	B-Algorithm
scope	O
and	O
features	O
are	O
constantly	O
being	O
extended	O
by	O
a	O
large	O
community	O
of	O
contributors	O
.	O
</s>
