<s>
Feynman	B-Algorithm
's	I-Algorithm
algorithm	I-Algorithm
is	O
an	O
algorithm	O
that	O
is	O
used	O
to	O
simulate	O
the	O
operations	O
of	O
a	O
quantum	B-Architecture
computer	I-Architecture
on	O
a	O
classical	O
computer	O
.	O
</s>
<s>
An	O
qubit	O
quantum	B-Architecture
computer	I-Architecture
takes	O
in	O
a	O
quantum	B-Application
circuit	I-Application
that	O
contains	O
gates	O
and	O
an	O
input	O
state	O
.	O
</s>
<s>
Since	O
the	O
quantum	B-Application
circuit	I-Application
that	O
generates	O
a	O
Bell	O
state	O
is	O
the	O
H	O
(	O
Hadamard	O
gate	O
)	O
gate	O
followed	O
by	O
the	O
CNOT	O
gate	O
,	O
the	O
unitary	O
for	O
this	O
circuit	O
is	O
.	O
</s>
<s>
Using	O
Feynman	B-Algorithm
's	I-Algorithm
algorithm	I-Algorithm
,	O
the	O
Bell	O
state	O
circuit	O
contains	O
histories	O
:	O
.	O
</s>
