% 
% File:	  test16.qasm
% Date:	  24-Mar-04
% Author: I. Chuang <ichuang@mit.edu>
%
% Sample qasm input file - example from Nielsen
% paper on cluster states
% 
% 	qubit	q0,\psi
% 	qubit	q1,\psi
% 	qubit	q2,\phi
% 	qubit	q3,0
% 
% 	nop	q0
% 	nop	q0
% 	slash	q0
% 	nop	q1
% 	ZZ	q1,q2
% 	cnot	q2,q3
% 	nop	q2
% 	discard	q2
% 	dmeter	q3

%  Time 01:
%    Gate 00 nop(q0)
%    Gate 03 nop(q1)
%  Time 02:
%    Gate 01 nop(q0)
%    Gate 04 ZZ(q1,q2)
%  Time 03:
%    Gate 02 slash(q0)
%    Gate 05 cnot(q2,q3)
%  Time 04:
%    Gate 06 nop(q2)
%    Gate 08 dmeter(q3)
%  Time 05:
%    Gate 07 discard(q2)

% Qubit circuit matrix:
%
% q0: gAA, gBA, gCA, n  , n  , n  
% q1: gAB, gBB, n  , n  , n  , n  
% q2: n  , gBC, gCC, gDC, gEC
% q3: n  , n  , gCD, gDD, N  , N  

\documentclass[11pt]{article}
\input{xyqcirc.tex}

% definitions for the circuit elements

\def\gAA{*-{}\w\A{gAA}}
\def\gBA{*-{}\w\A{gBA}}
\def\gCA{\slash\w\A{gCA}}
\def\gAB{*-{}\w\A{gAB}}
\def\gBB{\b\w\A{gBB}}
\def\gBC{\b\w\A{gBC}}
\def\gCC{\b\w\A{gCC}}
\def\gCD{\o\w\A{gCD}}
\def\gDC{*-{}\w\A{gDC}}
\def\gEC{\discard\w\A{gEC}}
\def\gDD{\dmeter{}\w\A{gDD}}

% definitions for bit labels and initial states

\def\bA{\qv{q_{0}}{\psi}}
\def\bB{\qv{q_{1}}{\psi}}
\def\bC{\qv{q_{2}}{\phi}}
\def\bD{\qv{q_{3}}{0}}

% The quantum circuit as an xymatrix

\xymatrix@R=5pt@C=10pt{
    \bA & \gAA &\gBA &\gCA &\n   &\n   &\n  
\\  \bB & \gAB &\gBB &\n   &\n   &\n   &\n  
\\  \bC & \n   &\gBC &\gCC &\gDC &\gEC
\\  \bD & \n   &\n   &\gCD &\gDD &\N   &\N  
%
% Vertical lines and other post-xymatrix latex
%
\ar@{-}"gBB";"gBC"
\ar@{-}"gCD";"gCC"
}

\end{document}