QNLab-USTC · hsc2021 · Jul 3, 2026 · Jul 3, 2026 · Jul 3, 2026
diff --git a/docs/build/doctrees/develop.doctree b/docs/build/doctrees/develop.doctree
diff --git a/docs/build/doctrees/environment.pickle b/docs/build/doctrees/environment.pickle
diff --git a/docs/build/doctrees/index.doctree b/docs/build/doctrees/index.doctree
diff --git a/docs/build/doctrees/install.doctree b/docs/build/doctrees/install.doctree
diff --git a/docs/build/doctrees/introduction.doctree b/docs/build/doctrees/introduction.doctree
diff --git a/docs/build/doctrees/modules.doctree b/docs/build/doctrees/modules.doctree
diff --git a/docs/build/doctrees/qns.doctree b/docs/build/doctrees/qns.doctree
diff --git a/docs/build/doctrees/qns.entity.cchannel.doctree b/docs/build/doctrees/qns.entity.cchannel.doctree
diff --git a/docs/build/doctrees/qns.entity.doctree b/docs/build/doctrees/qns.entity.doctree
diff --git a/docs/build/doctrees/qns.entity.memory.doctree b/docs/build/doctrees/qns.entity.memory.doctree
diff --git a/docs/build/doctrees/qns.entity.monitor.doctree b/docs/build/doctrees/qns.entity.monitor.doctree
diff --git a/docs/build/doctrees/qns.entity.node.doctree b/docs/build/doctrees/qns.entity.node.doctree
diff --git a/docs/build/doctrees/qns.entity.operator.doctree b/docs/build/doctrees/qns.entity.operator.doctree
diff --git a/docs/build/doctrees/qns.entity.qchannel.doctree b/docs/build/doctrees/qns.entity.qchannel.doctree
diff --git a/docs/build/doctrees/qns.entity.timer.doctree b/docs/build/doctrees/qns.entity.timer.doctree
diff --git a/docs/build/doctrees/qns.models.core.doctree b/docs/build/doctrees/qns.models.core.doctree
diff --git a/docs/build/doctrees/qns.models.delay.doctree b/docs/build/doctrees/qns.models.delay.doctree
diff --git a/docs/build/doctrees/qns.models.doctree b/docs/build/doctrees/qns.models.doctree
diff --git a/docs/build/doctrees/qns.models.epr.doctree b/docs/build/doctrees/qns.models.epr.doctree
diff --git a/docs/build/doctrees/qns.models.qubit.doctree b/docs/build/doctrees/qns.models.qubit.doctree
diff --git a/docs/build/doctrees/qns.network.doctree b/docs/build/doctrees/qns.network.doctree
diff --git a/docs/build/doctrees/qns.network.graphalg.doctree b/docs/build/doctrees/qns.network.graphalg.doctree
diff --git a/docs/build/doctrees/qns.network.protocol.doctree b/docs/build/doctrees/qns.network.protocol.doctree
diff --git a/docs/build/doctrees/qns.network.route.doctree b/docs/build/doctrees/qns.network.route.doctree
diff --git a/docs/build/doctrees/qns.network.topology.doctree b/docs/build/doctrees/qns.network.topology.doctree
diff --git a/docs/build/doctrees/qns.simulator.doctree b/docs/build/doctrees/qns.simulator.doctree
diff --git a/docs/build/doctrees/qns.utils.doctree b/docs/build/doctrees/qns.utils.doctree
diff --git a/docs/build/doctrees/tutorials.doctree b/docs/build/doctrees/tutorials.doctree
diff --git a/docs/build/doctrees/tutorials.entity.cchannel.doctree b/docs/build/doctrees/tutorials.entity.cchannel.doctree
diff --git a/docs/build/doctrees/tutorials.entity.doctree b/docs/build/doctrees/tutorials.entity.doctree
diff --git a/docs/build/doctrees/tutorials.entity.memory.doctree b/docs/build/doctrees/tutorials.entity.memory.doctree
diff --git a/docs/build/doctrees/tutorials.entity.monitor.doctree b/docs/build/doctrees/tutorials.entity.monitor.doctree
diff --git a/docs/build/doctrees/tutorials.entity.node.doctree b/docs/build/doctrees/tutorials.entity.node.doctree
diff --git a/docs/build/doctrees/tutorials.entity.operator.doctree b/docs/build/doctrees/tutorials.entity.operator.doctree
diff --git a/docs/build/doctrees/tutorials.entity.other.doctree b/docs/build/doctrees/tutorials.entity.other.doctree
diff --git a/docs/build/doctrees/tutorials.entity.qchannel.doctree b/docs/build/doctrees/tutorials.entity.qchannel.doctree
diff --git a/docs/build/doctrees/tutorials.models.delay.doctree b/docs/build/doctrees/tutorials.models.delay.doctree
diff --git a/docs/build/doctrees/tutorials.models.doctree b/docs/build/doctrees/tutorials.models.doctree
diff --git a/docs/build/doctrees/tutorials.models.epr.doctree b/docs/build/doctrees/tutorials.models.epr.doctree
diff --git a/docs/build/doctrees/tutorials.models.qubit.doctree b/docs/build/doctrees/tutorials.models.qubit.doctree
diff --git a/docs/build/doctrees/tutorials.network.doctree b/docs/build/doctrees/tutorials.network.doctree
diff --git a/docs/build/doctrees/tutorials.network.request.doctree b/docs/build/doctrees/tutorials.network.request.doctree
diff --git a/docs/build/doctrees/tutorials.network.route.doctree b/docs/build/doctrees/tutorials.network.route.doctree
diff --git a/docs/build/doctrees/tutorials.network.topology.doctree b/docs/build/doctrees/tutorials.network.topology.doctree
diff --git a/docs/build/doctrees/tutorials.parallel_simulation.doctree b/docs/build/doctrees/tutorials.parallel_simulation.doctree
diff --git a/docs/build/doctrees/tutorials.quickstart.doctree b/docs/build/doctrees/tutorials.quickstart.doctree
diff --git a/docs/build/doctrees/tutorials.simulator.doctree b/docs/build/doctrees/tutorials.simulator.doctree
diff --git a/docs/build/doctrees/tutorials.util.doctree b/docs/build/doctrees/tutorials.util.doctree
diff --git a/docs/build/html/_modules/index.html b/docs/build/html/_modules/index.html
@@ -81,6 +81,7 @@ <h1>All modules for which code is available</h1>
 <li><a href="qns/entity/node/node.html">qns.entity.node.node</a></li>
 <li><a href="qns/entity/operator/event.html">qns.entity.operator.event</a></li>
 <li><a href="qns/entity/operator/operator.html">qns.entity.operator.operator</a></li>
+<li><a href="qns/entity/qchannel/dqchannel.html">qns.entity.qchannel.dqchannel</a></li>
 <li><a href="qns/entity/qchannel/losschannel.html">qns.entity.qchannel.losschannel</a></li>
 <li><a href="qns/entity/qchannel/qchannel.html">qns.entity.qchannel.qchannel</a></li>
 <li><a href="qns/entity/timer/timer.html">qns.entity.timer.timer</a></li>

diff --git a/docs/build/html/_modules/qns/entity/qchannel/dqchannel.html b/docs/build/html/_modules/qns/entity/qchannel/dqchannel.html
diff --git a/docs/build/html/_modules/qns/network/topology/barabasialberttopo.html b/docs/build/html/_modules/qns/network/topology/barabasialberttopo.html
@@ -93,6 +93,7 @@ <h1>Source code for qns.network.topology.barabasialberttopo</h1><div class="high
 <span class="kn">import</span><span class="w"> </span><span class="nn">itertools</span>
 <span class="kn">from</span><span class="w"> </span><span class="nn">qns.entity.node.app</span><span class="w"> </span><span class="kn">import</span> <span class="n">Application</span>
 <span class="kn">from</span><span class="w"> </span><span class="nn">qns.entity.qchannel.qchannel</span><span class="w"> </span><span class="kn">import</span> <span class="n">QuantumChannel</span>
+<span class="kn">from</span><span class="w"> </span><span class="nn">qns.entity.qchannel.dqchannel</span><span class="w"> </span><span class="kn">import</span> <span class="n">Link_Decoherence_QuantumChannel</span>
 <span class="kn">from</span><span class="w"> </span><span class="nn">qns.entity.node.node</span><span class="w"> </span><span class="kn">import</span> <span class="n">QNode</span>
 <span class="kn">from</span><span class="w"> </span><span class="nn">typing</span><span class="w"> </span><span class="kn">import</span> <span class="n">Dict</span><span class="p">,</span> <span class="n">List</span><span class="p">,</span> <span class="n">Optional</span><span class="p">,</span> <span class="n">Tuple</span>
 <span class="kn">from</span><span class="w"> </span><span class="nn">qns.network.topology</span><span class="w"> </span><span class="kn">import</span> <span class="n">Topology</span>
@@ -111,14 +112,15 @@ <h1>Source code for qns.network.topology.barabasialberttopo</h1><div class="high
     <span class="k">def</span><span class="w"> </span><span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">nodes_number</span><span class="p">,</span> <span class="n">new_nodes_egdes</span><span class="p">:</span> <span class="nb">int</span><span class="p">,</span>
                  <span class="n">nodes_apps</span><span class="p">:</span> <span class="n">List</span><span class="p">[</span><span class="n">Application</span><span class="p">]</span> <span class="o">=</span> <span class="p">[],</span>
                  <span class="n">qchannel_args</span><span class="p">:</span> <span class="n">Dict</span> <span class="o">=</span> <span class="p">{},</span> <span class="n">cchannel_args</span><span class="p">:</span> <span class="n">Dict</span> <span class="o">=</span> <span class="p">{},</span>
-                 <span class="n">memory_args</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="n">List</span><span class="p">[</span><span class="n">Dict</span><span class="p">]]</span> <span class="o">=</span> <span class="p">{}):</span>
+                 <span class="n">memory_args</span><span class="p">:</span> <span class="n">Optional</span><span class="p">[</span><span class="n">List</span><span class="p">[</span><span class="n">Dict</span><span class="p">]]</span> <span class="o">=</span> <span class="p">{},</span> <span class="n">link_decoherence</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span>
 <span class="w">        </span><span class="sd">&quot;&quot;&quot;</span>
 <span class="sd">        Args:</span>
 <span class="sd">            nodes_number: the number of Qnodes</span>
 <span class="sd">            new_nodes_egdes: the number of edges of a new node, must be greater than 0 and less than nodes_number</span>
 <span class="sd">        &quot;&quot;&quot;</span>
         <span class="nb">super</span><span class="p">()</span><span class="o">.</span><span class="fm">__init__</span><span class="p">(</span><span class="n">nodes_number</span><span class="p">,</span> <span class="n">nodes_apps</span><span class="p">,</span> <span class="n">qchannel_args</span><span class="p">,</span> <span class="n">cchannel_args</span><span class="p">,</span> <span class="n">memory_args</span><span class="p">)</span>
         <span class="bp">self</span><span class="o">.</span><span class="n">new_nodes_egdes</span> <span class="o">=</span> <span class="n">new_nodes_egdes</span>
+        <span class="bp">self</span><span class="o">.</span><span class="n">link_decoherence</span> <span class="o">=</span> <span class="n">link_decoherence</span>
 
 <div class="viewcode-block" id="BarabasiAlbertTopology.build">
 <a class="viewcode-back" href="../../../../qns.network.topology.html#qns.network.topology.barabasialberttopo.BarabasiAlbertTopology.build">[docs]</a>
@@ -146,7 +148,11 @@ <h1>Source code for qns.network.topology.barabasialberttopo</h1><div class="high
             <span class="n">nl</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">n</span><span class="p">)</span>
         <span class="n">initial_edges</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="n">itertools</span><span class="o">.</span><span class="n">combinations</span><span class="p">(</span><span class="n">nl</span><span class="p">,</span> <span class="mi">2</span><span class="p">))</span>
         <span class="k">for</span> <span class="n">n1</span><span class="p">,</span> <span class="n">n2</span> <span class="ow">in</span> <span class="n">initial_edges</span><span class="p">:</span>
-            <span class="n">qc</span> <span class="o">=</span> <span class="n">QuantumChannel</span><span class="p">(</span><span class="n">name</span><span class="o">=</span><span class="sa">f</span><span class="s2">&quot;l</span><span class="si">{</span><span class="n">n1</span><span class="si">}</span><span class="s2">-</span><span class="si">{</span><span class="n">n2</span><span class="si">}</span><span class="s2">&quot;</span><span class="p">,</span> <span class="o">**</span><span class="bp">self</span><span class="o">.</span><span class="n">qchannel_args</span><span class="p">)</span>
+            <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">link_decoherence</span> <span class="ow">is</span> <span class="kc">False</span><span class="p">:</span>
+                <span class="n">qc</span> <span class="o">=</span> <span class="n">QuantumChannel</span><span class="p">(</span><span class="n">name</span><span class="o">=</span><span class="sa">f</span><span class="s2">&quot;l</span><span class="si">{</span><span class="n">n1</span><span class="si">}</span><span class="s2">-</span><span class="si">{</span><span class="n">n2</span><span class="si">}</span><span class="s2">&quot;</span><span class="p">,</span> <span class="o">**</span><span class="bp">self</span><span class="o">.</span><span class="n">qchannel_args</span><span class="p">)</span>
+            <span class="k">else</span><span class="p">:</span>
+                <span class="n">qc</span> <span class="o">=</span> <span class="n">Link_Decoherence_QuantumChannel</span><span class="p">(</span><span class="n">name</span><span class="o">=</span><span class="sa">f</span><span class="s2">&quot;l</span><span class="si">{</span><span class="n">n1</span><span class="si">}</span><span class="s2">-</span><span class="si">{</span><span class="n">n2</span><span class="si">}</span><span class="s2">&quot;</span><span class="p">,</span> <span class="o">**</span><span class="bp">self</span><span class="o">.</span><span class="n">qchannel_args</span><span class="p">)</span>
+                <span class="n">qc</span><span class="o">.</span><span class="n">create_entanglement_pool</span><span class="p">()</span>
             <span class="n">ll</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">qc</span><span class="p">)</span>
             <span class="n">n1</span><span class="o">.</span><span class="n">add_qchannel</span><span class="p">(</span><span class="n">qc</span><span class="p">)</span>
             <span class="n">n2</span><span class="o">.</span><span class="n">add_qchannel</span><span class="p">(</span><span class="n">qc</span><span class="p">)</span>
@@ -157,7 +163,11 @@ <h1>Source code for qns.network.topology.barabasialberttopo</h1><div class="high
             <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">new_nodes_egdes</span> <span class="o">==</span> <span class="mi">1</span> <span class="ow">and</span> <span class="n">i</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span>
                 <span class="n">n1</span> <span class="o">=</span> <span class="n">nl</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
                 <span class="n">nl</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">n</span><span class="p">)</span>
-                <span class="n">qc</span> <span class="o">=</span> <span class="n">QuantumChannel</span><span class="p">(</span><span class="n">name</span><span class="o">=</span><span class="sa">f</span><span class="s2">&quot;l</span><span class="si">{</span><span class="n">n1</span><span class="si">}</span><span class="s2">-</span><span class="si">{</span><span class="n">n</span><span class="si">}</span><span class="s2">&quot;</span><span class="p">,</span> <span class="o">**</span><span class="bp">self</span><span class="o">.</span><span class="n">qchannel_args</span><span class="p">)</span>
+                <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">link_decoherence</span> <span class="ow">is</span> <span class="kc">False</span><span class="p">:</span>
+                    <span class="n">qc</span> <span class="o">=</span> <span class="n">QuantumChannel</span><span class="p">(</span><span class="n">name</span><span class="o">=</span><span class="sa">f</span><span class="s2">&quot;l</span><span class="si">{</span><span class="n">n1</span><span class="si">}</span><span class="s2">-</span><span class="si">{</span><span class="n">n</span><span class="si">}</span><span class="s2">&quot;</span><span class="p">,</span> <span class="o">**</span><span class="bp">self</span><span class="o">.</span><span class="n">qchannel_args</span><span class="p">)</span>
+                <span class="k">else</span><span class="p">:</span>
+                    <span class="n">qc</span> <span class="o">=</span> <span class="n">Link_Decoherence_QuantumChannel</span><span class="p">(</span><span class="n">name</span><span class="o">=</span><span class="sa">f</span><span class="s2">&quot;l</span><span class="si">{</span><span class="n">n1</span><span class="si">}</span><span class="s2">-</span><span class="si">{</span><span class="n">n</span><span class="si">}</span><span class="s2">&quot;</span><span class="p">,</span> <span class="o">**</span><span class="bp">self</span><span class="o">.</span><span class="n">qchannel_args</span><span class="p">)</span>
+                    <span class="n">qc</span><span class="o">.</span><span class="n">create_entanglement_pool</span><span class="p">()</span>
                 <span class="n">ll</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">qc</span><span class="p">)</span>
                 <span class="n">n1</span><span class="o">.</span><span class="n">add_qchannel</span><span class="p">(</span><span class="n">qc</span><span class="p">)</span>
                 <span class="n">n</span><span class="o">.</span><span class="n">add_qchannel</span><span class="p">(</span><span class="n">qc</span><span class="p">)</span>
@@ -166,7 +176,11 @@ <h1>Source code for qns.network.topology.barabasialberttopo</h1><div class="high
             <span class="n">weighted_choice</span> <span class="o">=</span> <span class="p">[</span><span class="nb">len</span><span class="p">(</span><span class="n">n_i</span><span class="o">.</span><span class="n">qchannels</span><span class="p">)</span> <span class="k">for</span> <span class="n">n_i</span> <span class="ow">in</span> <span class="n">nl</span><span class="p">]</span>
             <span class="n">choice_list</span> <span class="o">=</span> <span class="n">get_weighted_choice</span><span class="p">(</span><span class="n">nl</span><span class="p">,</span> <span class="n">weighted_choice</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">new_nodes_egdes</span><span class="p">)</span>
             <span class="k">for</span> <span class="n">n_i</span> <span class="ow">in</span> <span class="n">choice_list</span><span class="p">:</span>
-                <span class="n">qc</span> <span class="o">=</span> <span class="n">QuantumChannel</span><span class="p">(</span><span class="n">name</span><span class="o">=</span><span class="sa">f</span><span class="s2">&quot;l</span><span class="si">{</span><span class="n">n_i</span><span class="si">}</span><span class="s2">-</span><span class="si">{</span><span class="n">n</span><span class="si">}</span><span class="s2">&quot;</span><span class="p">,</span> <span class="o">**</span><span class="bp">self</span><span class="o">.</span><span class="n">qchannel_args</span><span class="p">)</span>
+                <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">link_decoherence</span> <span class="ow">is</span> <span class="kc">False</span><span class="p">:</span>
+                    <span class="n">qc</span> <span class="o">=</span> <span class="n">QuantumChannel</span><span class="p">(</span><span class="n">name</span><span class="o">=</span><span class="sa">f</span><span class="s2">&quot;l</span><span class="si">{</span><span class="n">n_i</span><span class="si">}</span><span class="s2">-</span><span class="si">{</span><span class="n">n</span><span class="si">}</span><span class="s2">&quot;</span><span class="p">,</span> <span class="o">**</span><span class="bp">self</span><span class="o">.</span><span class="n">qchannel_args</span><span class="p">)</span>
+                <span class="k">else</span><span class="p">:</span>
+                    <span class="n">qc</span> <span class="o">=</span> <span class="n">Link_Decoherence_QuantumChannel</span><span class="p">(</span><span class="n">name</span><span class="o">=</span><span class="sa">f</span><span class="s2">&quot;l</span><span class="si">{</span><span class="n">n_i</span><span class="si">}</span><span class="s2">-</span><span class="si">{</span><span class="n">n</span><span class="si">}</span><span class="s2">&quot;</span><span class="p">,</span> <span class="o">**</span><span class="bp">self</span><span class="o">.</span><span class="n">qchannel_args</span><span class="p">)</span>
+                    <span class="n">qc</span><span class="o">.</span><span class="n">create_entanglement_pool</span><span class="p">()</span>
                 <span class="n">ll</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">qc</span><span class="p">)</span>
                 <span class="n">n</span><span class="o">.</span><span class="n">add_qchannel</span><span class="p">(</span><span class="n">qc</span><span class="p">)</span>
                 <span class="n">n_i</span><span class="o">.</span><span class="n">add_qchannel</span><span class="p">(</span><span class="n">qc</span><span class="p">)</span>