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<a class="navbar-brand"><b>QuEST</b> v3.1.0<br>The Quantum Exact Simulation Toolkit</a>
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<a href="#func-members">Functions</a> </div>
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<div class="title">Gates</div> </div>
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<p>Non-unitary but norm-preserving gates, such as measurements.
<a href="#details">More...</a></p>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
Functions</h2></td></tr>
<tr class="memitem:gab164930b260718d85ed3f55f50c76a59"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__normgate.html#gab164930b260718d85ed3f55f50c76a59">collapseToOutcome</a> (<a class="el" href="structQureg.html">Qureg</a> qureg, const int measureQubit, int outcome)</td></tr>
<tr class="memdesc:gab164930b260718d85ed3f55f50c76a59"><td class="mdescLeft"> </td><td class="mdescRight">Updates <code>qureg</code> to be consistent with measuring <code>measureQubit</code> in the given <code>outcome</code> (0 or 1), and returns the probability of such a measurement outcome. <a href="group__normgate.html#gab164930b260718d85ed3f55f50c76a59">More...</a><br /></td></tr>
<tr class="separator:gab164930b260718d85ed3f55f50c76a59"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga2a3794103125f1e3cfa103f8b1963656"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__normgate.html#ga2a3794103125f1e3cfa103f8b1963656">measure</a> (<a class="el" href="structQureg.html">Qureg</a> qureg, int measureQubit)</td></tr>
<tr class="memdesc:ga2a3794103125f1e3cfa103f8b1963656"><td class="mdescLeft"> </td><td class="mdescRight">Measures a single qubit, collapsing it randomly to 0 or 1. <a href="group__normgate.html#ga2a3794103125f1e3cfa103f8b1963656">More...</a><br /></td></tr>
<tr class="separator:ga2a3794103125f1e3cfa103f8b1963656"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gae192ac0759e46c7b20a7182020155240"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__normgate.html#gae192ac0759e46c7b20a7182020155240">measureWithStats</a> (<a class="el" href="structQureg.html">Qureg</a> qureg, int measureQubit, <a class="el" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> *outcomeProb)</td></tr>
<tr class="memdesc:gae192ac0759e46c7b20a7182020155240"><td class="mdescLeft"> </td><td class="mdescRight">Measures a single qubit, collapsing it randomly to 0 or 1, and additionally gives the probability of that outcome. <a href="group__normgate.html#gae192ac0759e46c7b20a7182020155240">More...</a><br /></td></tr>
<tr class="separator:gae192ac0759e46c7b20a7182020155240"><td class="memSeparator" colspan="2"> </td></tr>
</table>
<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<p>Non-unitary but norm-preserving gates, such as measurements. </p>
<h2 class="groupheader">Function Documentation</h2>
<a id="gab164930b260718d85ed3f55f50c76a59"></a>
<h2 class="memtitle"><span class="permalink"><a href="#gab164930b260718d85ed3f55f50c76a59">◆ </a></span>collapseToOutcome()</h2>
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<td class="memname"><a class="el" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> collapseToOutcome </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structQureg.html">Qureg</a> </td>
<td class="paramname"><em>qureg</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const int </td>
<td class="paramname"><em>measureQubit</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>outcome</em> </td>
</tr>
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<td></td>
<td>)</td>
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<p>Updates <code>qureg</code> to be consistent with measuring <code>measureQubit</code> in the given <code>outcome</code> (0 or 1), and returns the probability of such a measurement outcome. </p>
<p>This is effectively performing a projection, or a measurement with a forced outcome. This is an irreversible change to the state, whereby computational states inconsistant with the outcome are given zero amplitude and the <code>qureg</code> is renormalised. Exits with error if the given outcome has a near zero probability, and so cannot be collapsed into.</p>
<p>Note that the collapse probably used for renormalisation is calculated for <code>outcome</code> <code>=</code> <code>0</code>, and assumed 1 minus this probability if <code>outcome</code> <code>=</code> <code>1</code>. Hence this routine will not correctly project un-normalised quregs onto <code>outcome</code> <code>=</code> <code>1</code>.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in,out]</td><td class="paramname">qureg</td><td>object representing the set of all qubits </td></tr>
<tr><td class="paramdir">[in]</td><td class="paramname">measureQubit</td><td>qubit to measure </td></tr>
<tr><td class="paramdir">[in]</td><td class="paramname">outcome</td><td>to force the measure qubit to enter </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>probability of the (forced) measurement outcome </dd></dl>
<dl class="exception"><dt>Exceptions</dt><dd>
<table class="exception">
<tr><td class="paramname">exitWithError</td><td>if <code>measureQubit</code> is outside [0, <code>qureg.numQubitsRepresented</code>), or if <code>outcome</code> is not in {0, 1}, or if the probability of <code>outcome</code> is zero (within machine epsilon) </td></tr>
</table>
</dd>
</dl>
<dl class="section author"><dt>Author</dt><dd>Ania Brown (state-vector) </dd>
<dd>
Tyson Jones (density matrix) </dd></dl>
<p class="definition">Definition at line <a class="el" href="QuEST_8c_source.html#l00724">724</a> of file <a class="el" href="QuEST_8c_source.html">QuEST.c</a>.</p>
<div class="fragment"><div class="line"><a name="l00724"></a><span class="lineno"> 724</span>  {</div>
<div class="line"><a name="l00725"></a><span class="lineno"> 725</span>  <a class="code" href="QuEST__validation_8c.html#ac31c45c5a31c523be0eb26abba6cf598">validateTarget</a>(qureg, measureQubit, __func__);</div>
<div class="line"><a name="l00726"></a><span class="lineno"> 726</span>  <a class="code" href="QuEST__validation_8c.html#ad613c75ff252a88e54f911053bd2032c">validateOutcome</a>(outcome, __func__);</div>
<div class="line"><a name="l00727"></a><span class="lineno"> 727</span>  </div>
<div class="line"><a name="l00728"></a><span class="lineno"> 728</span>  <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> outcomeProb;</div>
<div class="line"><a name="l00729"></a><span class="lineno"> 729</span>  <span class="keywordflow">if</span> (qureg.<a class="code" href="structQureg.html#acf78445e9435d09f44f0cc832c6aee79">isDensityMatrix</a>) {</div>
<div class="line"><a name="l00730"></a><span class="lineno"> 730</span>  outcomeProb = <a class="code" href="QuEST__internal_8h.html#ad405e3fac20997043e0236b751e44270">densmatr_calcProbOfOutcome</a>(qureg, measureQubit, outcome);</div>
<div class="line"><a name="l00731"></a><span class="lineno"> 731</span>  <a class="code" href="QuEST__validation_8c.html#a8accabb8a9d573c2ff80305841c3053d">validateMeasurementProb</a>(outcomeProb, __func__);</div>
<div class="line"><a name="l00732"></a><span class="lineno"> 732</span>  <a class="code" href="QuEST__internal_8h.html#ab321af37fe3490253e12b7c70b8d2a98">densmatr_collapseToKnownProbOutcome</a>(qureg, measureQubit, outcome, outcomeProb);</div>
<div class="line"><a name="l00733"></a><span class="lineno"> 733</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00734"></a><span class="lineno"> 734</span>  outcomeProb = <a class="code" href="QuEST__internal_8h.html#ab33cdf01831c4545e51299178acf7f27">statevec_calcProbOfOutcome</a>(qureg, measureQubit, outcome);</div>
<div class="line"><a name="l00735"></a><span class="lineno"> 735</span>  <a class="code" href="QuEST__validation_8c.html#a8accabb8a9d573c2ff80305841c3053d">validateMeasurementProb</a>(outcomeProb, __func__);</div>
<div class="line"><a name="l00736"></a><span class="lineno"> 736</span>  <a class="code" href="QuEST__internal_8h.html#ae7f25bb40734e18a992403b17355893b">statevec_collapseToKnownProbOutcome</a>(qureg, measureQubit, outcome, outcomeProb);</div>
<div class="line"><a name="l00737"></a><span class="lineno"> 737</span>  }</div>
<div class="line"><a name="l00738"></a><span class="lineno"> 738</span>  </div>
<div class="line"><a name="l00739"></a><span class="lineno"> 739</span>  <a class="code" href="QuEST__qasm_8c.html#a76841e952d8c587c0c5ba947d86b061c">qasm_recordMeasurement</a>(qureg, measureQubit);</div>
<div class="line"><a name="l00740"></a><span class="lineno"> 740</span>  <span class="keywordflow">return</span> outcomeProb;</div>
<div class="line"><a name="l00741"></a><span class="lineno"> 741</span> }</div>
</div><!-- fragment -->
<p class="reference">References <a class="el" href="QuEST__cpu__distributed_8c_source.html#l01279">densmatr_calcProbOfOutcome()</a>, <a class="el" href="QuEST__cpu_8c_source.html#l00784">densmatr_collapseToKnownProbOutcome()</a>, <a class="el" href="QuEST_8h_source.html#l00163">Qureg::isDensityMatrix</a>, <a class="el" href="QuEST__qasm_8c_source.html#l00398">qasm_recordMeasurement()</a>, <a class="el" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a>, <a class="el" href="QuEST__cpu__distributed_8c_source.html#l01263">statevec_calcProbOfOutcome()</a>, <a class="el" href="QuEST__cpu__distributed_8c_source.html#l01301">statevec_collapseToKnownProbOutcome()</a>, <a class="el" href="QuEST__validation_8c_source.html#l00430">validateMeasurementProb()</a>, <a class="el" href="QuEST__validation_8c_source.html#l00426">validateOutcome()</a>, and <a class="el" href="QuEST__validation_8c_source.html#l00307">validateTarget()</a>.</p>
<p class="reference">Referenced by <a class="el" href="test__gates_8cpp_source.html#l00015">TEST_CASE()</a>.</p>
</div>
</div>
<a id="ga2a3794103125f1e3cfa103f8b1963656"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ga2a3794103125f1e3cfa103f8b1963656">◆ </a></span>measure()</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
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<td class="memname">int measure </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structQureg.html">Qureg</a> </td>
<td class="paramname"><em>qureg</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>measureQubit</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Measures a single qubit, collapsing it randomly to 0 or 1. </p>
<p>Outcome probabilities are weighted by the state vector, which is irreversibly changed after collapse to be consistent with the outcome.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in,out]</td><td class="paramname">qureg</td><td>object representing the set of all qubits </td></tr>
<tr><td class="paramdir">[in]</td><td class="paramname">measureQubit</td><td>qubit to measure </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>the measurement outcome, 0 or 1 </dd></dl>
<dl class="exception"><dt>Exceptions</dt><dd>
<table class="exception">
<tr><td class="paramname">exitWithError</td><td>if <code>measureQubit</code> is outside [0, <code>qureg.numQubitsRepresented</code>) </td></tr>
</table>
</dd>
</dl>
<dl class="section author"><dt>Author</dt><dd>Ania Brown (state-vector) </dd>
<dd>
Tyson Jones (density matrix) </dd></dl>
<p class="definition">Definition at line <a class="el" href="QuEST_8c_source.html#l00756">756</a> of file <a class="el" href="QuEST_8c_source.html">QuEST.c</a>.</p>
<div class="fragment"><div class="line"><a name="l00756"></a><span class="lineno"> 756</span>  {</div>
<div class="line"><a name="l00757"></a><span class="lineno"> 757</span>  <a class="code" href="QuEST__validation_8c.html#ac31c45c5a31c523be0eb26abba6cf598">validateTarget</a>(qureg, measureQubit, __func__);</div>
<div class="line"><a name="l00758"></a><span class="lineno"> 758</span>  </div>
<div class="line"><a name="l00759"></a><span class="lineno"> 759</span>  <span class="keywordtype">int</span> outcome;</div>
<div class="line"><a name="l00760"></a><span class="lineno"> 760</span>  <a class="code" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> discardedProb;</div>
<div class="line"><a name="l00761"></a><span class="lineno"> 761</span>  <span class="keywordflow">if</span> (qureg.<a class="code" href="structQureg.html#acf78445e9435d09f44f0cc832c6aee79">isDensityMatrix</a>)</div>
<div class="line"><a name="l00762"></a><span class="lineno"> 762</span>  outcome = <a class="code" href="QuEST__common_8c.html#ae4ebc1f4dd48922bfb30ad1692310269">densmatr_measureWithStats</a>(qureg, measureQubit, &discardedProb);</div>
<div class="line"><a name="l00763"></a><span class="lineno"> 763</span>  <span class="keywordflow">else</span></div>
<div class="line"><a name="l00764"></a><span class="lineno"> 764</span>  outcome = <a class="code" href="QuEST__common_8c.html#ac2eb81c71d0e0fbec7be5b45b1db1448">statevec_measureWithStats</a>(qureg, measureQubit, &discardedProb);</div>
<div class="line"><a name="l00765"></a><span class="lineno"> 765</span>  </div>
<div class="line"><a name="l00766"></a><span class="lineno"> 766</span>  <a class="code" href="QuEST__qasm_8c.html#a76841e952d8c587c0c5ba947d86b061c">qasm_recordMeasurement</a>(qureg, measureQubit);</div>
<div class="line"><a name="l00767"></a><span class="lineno"> 767</span>  <span class="keywordflow">return</span> outcome;</div>
<div class="line"><a name="l00768"></a><span class="lineno"> 768</span> }</div>
</div><!-- fragment -->
<p class="reference">References <a class="el" href="QuEST__common_8c_source.html#l00368">densmatr_measureWithStats()</a>, <a class="el" href="QuEST_8h_source.html#l00163">Qureg::isDensityMatrix</a>, <a class="el" href="QuEST__qasm_8c_source.html#l00398">qasm_recordMeasurement()</a>, <a class="el" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a>, <a class="el" href="QuEST__common_8c_source.html#l00360">statevec_measureWithStats()</a>, and <a class="el" href="QuEST__validation_8c_source.html#l00307">validateTarget()</a>.</p>
<p class="reference">Referenced by <a class="el" href="test__gates_8cpp_source.html#l00121">TEST_CASE()</a>.</p>
</div>
</div>
<a id="gae192ac0759e46c7b20a7182020155240"></a>
<h2 class="memtitle"><span class="permalink"><a href="#gae192ac0759e46c7b20a7182020155240">◆ </a></span>measureWithStats()</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">int measureWithStats </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structQureg.html">Qureg</a> </td>
<td class="paramname"><em>qureg</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>measureQubit</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a> * </td>
<td class="paramname"><em>outcomeProb</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Measures a single qubit, collapsing it randomly to 0 or 1, and additionally gives the probability of that outcome. </p>
<p>Outcome probabilities are weighted by the state vector, which is irreversibly changed after collapse to be consistent with the outcome.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[in,out]</td><td class="paramname">qureg</td><td>object representing the set of all qubits </td></tr>
<tr><td class="paramdir">[in]</td><td class="paramname">measureQubit</td><td>qubit to measure </td></tr>
<tr><td class="paramdir">[out]</td><td class="paramname">outcomeProb</td><td>a pointer to a qreal which is set to the probability of the occurred outcome </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>the measurement outcome, 0 or 1 </dd></dl>
<dl class="exception"><dt>Exceptions</dt><dd>
<table class="exception">
<tr><td class="paramname">exitWithError</td><td>if <code>measureQubit</code> is outside [0, <code>qureg.numQubitsRepresented</code>) </td></tr>
</table>
</dd>
</dl>
<dl class="section author"><dt>Author</dt><dd>Ania Brown (state-vector) </dd>
<dd>
Tyson Jones (density matrix) </dd></dl>
<p class="definition">Definition at line <a class="el" href="QuEST_8c_source.html#l00743">743</a> of file <a class="el" href="QuEST_8c_source.html">QuEST.c</a>.</p>
<div class="fragment"><div class="line"><a name="l00743"></a><span class="lineno"> 743</span>  {</div>
<div class="line"><a name="l00744"></a><span class="lineno"> 744</span>  <a class="code" href="QuEST__validation_8c.html#ac31c45c5a31c523be0eb26abba6cf598">validateTarget</a>(qureg, measureQubit, __func__);</div>
<div class="line"><a name="l00745"></a><span class="lineno"> 745</span>  </div>
<div class="line"><a name="l00746"></a><span class="lineno"> 746</span>  <span class="keywordtype">int</span> outcome;</div>
<div class="line"><a name="l00747"></a><span class="lineno"> 747</span>  <span class="keywordflow">if</span> (qureg.<a class="code" href="structQureg.html#acf78445e9435d09f44f0cc832c6aee79">isDensityMatrix</a>)</div>
<div class="line"><a name="l00748"></a><span class="lineno"> 748</span>  outcome = <a class="code" href="QuEST__common_8c.html#ae4ebc1f4dd48922bfb30ad1692310269">densmatr_measureWithStats</a>(qureg, measureQubit, outcomeProb);</div>
<div class="line"><a name="l00749"></a><span class="lineno"> 749</span>  <span class="keywordflow">else</span></div>
<div class="line"><a name="l00750"></a><span class="lineno"> 750</span>  outcome = <a class="code" href="QuEST__common_8c.html#ac2eb81c71d0e0fbec7be5b45b1db1448">statevec_measureWithStats</a>(qureg, measureQubit, outcomeProb);</div>
<div class="line"><a name="l00751"></a><span class="lineno"> 751</span>  </div>
<div class="line"><a name="l00752"></a><span class="lineno"> 752</span>  <a class="code" href="QuEST__qasm_8c.html#a76841e952d8c587c0c5ba947d86b061c">qasm_recordMeasurement</a>(qureg, measureQubit);</div>
<div class="line"><a name="l00753"></a><span class="lineno"> 753</span>  <span class="keywordflow">return</span> outcome;</div>
<div class="line"><a name="l00754"></a><span class="lineno"> 754</span> }</div>
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<p class="reference">References <a class="el" href="QuEST__common_8c_source.html#l00368">densmatr_measureWithStats()</a>, <a class="el" href="QuEST_8h_source.html#l00163">Qureg::isDensityMatrix</a>, <a class="el" href="QuEST__qasm_8c_source.html#l00398">qasm_recordMeasurement()</a>, <a class="el" href="QuEST__common_8c_source.html#l00360">statevec_measureWithStats()</a>, and <a class="el" href="QuEST__validation_8c_source.html#l00307">validateTarget()</a>.</p>
<p class="reference">Referenced by <a class="el" href="test__gates_8cpp_source.html#l00213">TEST_CASE()</a>.</p>
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<div class="ttc" id="aQuEST__validation_8c_html_a8accabb8a9d573c2ff80305841c3053d"><div class="ttname"><a href="QuEST__validation_8c.html#a8accabb8a9d573c2ff80305841c3053d">validateMeasurementProb</a></div><div class="ttdeci">void validateMeasurementProb(qreal prob, const char *caller)</div><div class="ttdef"><b>Definition:</b> <a href="QuEST__validation_8c_source.html#l00430">QuEST_validation.c:430</a></div></div>
<div class="ttc" id="aQuEST__validation_8c_html_ac31c45c5a31c523be0eb26abba6cf598"><div class="ttname"><a href="QuEST__validation_8c.html#ac31c45c5a31c523be0eb26abba6cf598">validateTarget</a></div><div class="ttdeci">void validateTarget(Qureg qureg, int targetQubit, const char *caller)</div><div class="ttdef"><b>Definition:</b> <a href="QuEST__validation_8c_source.html#l00307">QuEST_validation.c:307</a></div></div>
<div class="ttc" id="aQuEST__validation_8c_html_ad613c75ff252a88e54f911053bd2032c"><div class="ttname"><a href="QuEST__validation_8c.html#ad613c75ff252a88e54f911053bd2032c">validateOutcome</a></div><div class="ttdeci">void validateOutcome(int outcome, const char *caller)</div><div class="ttdef"><b>Definition:</b> <a href="QuEST__validation_8c_source.html#l00426">QuEST_validation.c:426</a></div></div>
<div class="ttc" id="aQuEST__internal_8h_html_ab321af37fe3490253e12b7c70b8d2a98"><div class="ttname"><a href="QuEST__internal_8h.html#ab321af37fe3490253e12b7c70b8d2a98">densmatr_collapseToKnownProbOutcome</a></div><div class="ttdeci">void densmatr_collapseToKnownProbOutcome(Qureg qureg, const int measureQubit, int outcome, qreal outcomeProb)</div><div class="ttdoc">Renorms (/prob) every | * outcome * >< * outcome * | state, setting all others to zero.</div><div class="ttdef"><b>Definition:</b> <a href="QuEST__cpu_8c_source.html#l00784">QuEST_cpu.c:784</a></div></div>
<div class="ttc" id="agroup__type_html_ga7740e349b4f8bae6451547680f0ce2d6"><div class="ttname"><a href="group__type.html#ga7740e349b4f8bae6451547680f0ce2d6">qreal</a></div><div class="ttdeci">#define qreal</div></div>
<div class="ttc" id="aQuEST__internal_8h_html_ab33cdf01831c4545e51299178acf7f27"><div class="ttname"><a href="QuEST__internal_8h.html#ab33cdf01831c4545e51299178acf7f27">statevec_calcProbOfOutcome</a></div><div class="ttdeci">qreal statevec_calcProbOfOutcome(Qureg qureg, const int measureQubit, int outcome)</div><div class="ttdef"><b>Definition:</b> <a href="QuEST__cpu__distributed_8c_source.html#l01263">QuEST_cpu_distributed.c:1263</a></div></div>
<div class="ttc" id="aQuEST__internal_8h_html_ae7f25bb40734e18a992403b17355893b"><div class="ttname"><a href="QuEST__internal_8h.html#ae7f25bb40734e18a992403b17355893b">statevec_collapseToKnownProbOutcome</a></div><div class="ttdeci">void statevec_collapseToKnownProbOutcome(Qureg qureg, const int measureQubit, int outcome, qreal outcomeProb)</div><div class="ttdef"><b>Definition:</b> <a href="QuEST__cpu__distributed_8c_source.html#l01301">QuEST_cpu_distributed.c:1301</a></div></div>
<div class="ttc" id="aQuEST__common_8c_html_ac2eb81c71d0e0fbec7be5b45b1db1448"><div class="ttname"><a href="QuEST__common_8c.html#ac2eb81c71d0e0fbec7be5b45b1db1448">statevec_measureWithStats</a></div><div class="ttdeci">int statevec_measureWithStats(Qureg qureg, int measureQubit, qreal *outcomeProb)</div><div class="ttdef"><b>Definition:</b> <a href="QuEST__common_8c_source.html#l00360">QuEST_common.c:360</a></div></div>
<div class="ttc" id="aQuEST__internal_8h_html_ad405e3fac20997043e0236b751e44270"><div class="ttname"><a href="QuEST__internal_8h.html#ad405e3fac20997043e0236b751e44270">densmatr_calcProbOfOutcome</a></div><div class="ttdeci">qreal densmatr_calcProbOfOutcome(Qureg qureg, const int measureQubit, int outcome)</div><div class="ttdef"><b>Definition:</b> <a href="QuEST__cpu__distributed_8c_source.html#l01279">QuEST_cpu_distributed.c:1279</a></div></div>
<div class="ttc" id="astructQureg_html_acf78445e9435d09f44f0cc832c6aee79"><div class="ttname"><a href="structQureg.html#acf78445e9435d09f44f0cc832c6aee79">Qureg::isDensityMatrix</a></div><div class="ttdeci">int isDensityMatrix</div><div class="ttdoc">Whether this instance is a density-state representation.</div><div class="ttdef"><b>Definition:</b> <a href="QuEST_8h_source.html#l00163">QuEST.h:163</a></div></div>
<div class="ttc" id="aQuEST__qasm_8c_html_a76841e952d8c587c0c5ba947d86b061c"><div class="ttname"><a href="QuEST__qasm_8c.html#a76841e952d8c587c0c5ba947d86b061c">qasm_recordMeasurement</a></div><div class="ttdeci">void qasm_recordMeasurement(Qureg qureg, const int measureQubit)</div><div class="ttdef"><b>Definition:</b> <a href="QuEST__qasm_8c_source.html#l00398">QuEST_qasm.c:398</a></div></div>
<div class="ttc" id="aQuEST__common_8c_html_ae4ebc1f4dd48922bfb30ad1692310269"><div class="ttname"><a href="QuEST__common_8c.html#ae4ebc1f4dd48922bfb30ad1692310269">densmatr_measureWithStats</a></div><div class="ttdeci">int densmatr_measureWithStats(Qureg qureg, int measureQubit, qreal *outcomeProb)</div><div class="ttdef"><b>Definition:</b> <a href="QuEST__common_8c_source.html#l00368">QuEST_common.c:368</a></div></div>
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