Few improvements and added link to Quantum Programming Studio

Author: perak

README.md

@@ -4,6 +4,18 @@ Quantum Circuit Simulator
 Quantum circuit simulator implemented in javascript. Smoothly runs 20+ qubit simulations in browser or at server (node.js). You can use it in your javascript program to run quantum simulations. Circuit can be imported from and exported to [OpenQASM](https://github.com/Qiskit/openqasm). You can export circuit to [pyQuil](http://docs.rigetti.com/en/latest/index.html) and [Quil](https://arxiv.org/abs/1608.03355) so it can be used for QASM to Quil/pyQuil conversion. Circuit drawing can be exported to [SVG](https://www.w3.org/Graphics/SVG/) vector image.
 
 
+### Live examples
+
+
+<a href="http://www.youtube.com/watch?feature=player_embedded&v=hhPUQtUqYCI" target="_blank"><img src="http://img.youtube.com/vi/hhPUQtUqYCI/0.jpg" alt="Quantum Programming Studio - preview" width="480" height="360" border="10" /></a>
+
+- [Quantum Programming Studio](https://quantum-circuit.com) Web based quantum programming IDE and simulator
+
+- [qasm2pyquil](https://quantum-circuit.com/qasm2pyquil) QASM to pyQuil/Quil online converter
+
+- [example.html](https://quantum-circuit.com/example.html)
+
+
 Using in browser
 ----------------
 
@@ -26,12 +38,6 @@ Simply include [quantum-circuit.min.js](dist/) into your html page (available vi
 </html>
 ```
 
-### Live examples
-
-- [qasm2pyquil](https://quantum-circuit.com/qasm2pyquil) QASM to pyQuil/Quil online converter
-
-- [example.html](https://quantum-circuit.com/example.html)
-
 
 Using at server with node.js
 ----------------------------

benchmark/benchmark3.js

@@ -61,7 +61,7 @@ for(var qubits = 2; qubits <= 25; qubits++) {
 		circ.addGate("swap", -1, [i, (qubits - i) - 1]);
 	}
 
-	circ.run(null, { partitioning: true });
+	circ.run(null, { partitioning: false });
 
 	var heapUsedMB = process.memoryUsage().heapUsed / 1024 / 1024;
 

dist/quantum-circuit.js

@@ -1510,6 +1510,48 @@ QuantumCircuit.prototype.addMeasure = function(wire, creg, cbit) {
 	this.addGate("measure", -1, wire, { creg: { name: creg, bit: cbit } });
 };
 
+QuantumCircuit.prototype.removeTrailingColumns = function() {
+	var numCols = this.numCols();
+	for(var column = numCols - 1; column >= 0; column--) {
+		var isEmptyCol = true;
+		for(var wire = 0; wire < this.numQubits; wire++) {
+			var gate = this.gates[wire][column];
+			if(gate) {
+				isEmptyCol = false;
+				break;
+			}
+		}
+
+		if(!isEmptyCol) {
+			return;
+		}
+
+		for(var wire = 0; wire < this.numQubits; wire++) {
+			this.gates[wire].pop();
+		}
+	}
+};
+
+QuantumCircuit.prototype.removeTrailingRows = function() {
+	var numCols = this.numCols();
+	for(var wire = this.numQubits - 1; wire >= 0; wire--) {
+		var isEmptyRow = true;
+		for(var column = 0; column < numCols; column++) {
+			var gate = this.gates[wire][column];
+			if(gate) {
+				isEmptyRow = false;
+				break;
+			}
+		}
+
+		if(!isEmptyRow) {
+			return;
+		}
+		this.gates.pop();
+		this.numQubits--;
+	}
+};
+
 
 QuantumCircuit.prototype.applyTransform = function(U, qubits) {
 	var newState = {};
@@ -4014,6 +4056,15 @@ QuantumCircuit.prototype.print = function(onlyPossible) {
 	console.log(this.stateAsString(onlyPossible));
 };
 
+QuantumCircuit.prototype.cregsAsString = function() {
+	var s = "";
+	for(var creg in this.cregs) {
+		var value = this.getCregValue(creg);
+		s += creg + "\t" + value.toString(2) + "\t" + value + "\n";
+	}
+	return s;
+};
+
 
 QuantumCircuit.prototype.createCreg = function(creg, len) {
 	this.cregs[creg] = [];

dist/quantum-circuit.min.js

@@ -4,6 +4,18 @@ Quantum Circuit Simulator
 Quantum circuit simulator implemented in javascript. Smoothly runs 20+ qubit simulations in browser or at server (node.js). You can use it in your javascript program to run quantum simulations. Circuit can be imported from and exported to [OpenQASM](https://github.com/Qiskit/openqasm). You can export circuit to [pyQuil](http://docs.rigetti.com/en/latest/index.html) and [Quil](https://arxiv.org/abs/1608.03355) so it can be used for QASM to Quil/pyQuil conversion. Circuit drawing can be exported to [SVG](https://www.w3.org/Graphics/SVG/) vector image.
 
 
+### Live examples
+
+
+<a href="http://www.youtube.com/watch?feature=player_embedded&v=hhPUQtUqYCI" target="_blank"><img src="http://img.youtube.com/vi/hhPUQtUqYCI/0.jpg" alt="Quantum Programming Studio - preview" width="480" height="360" border="10" /></a>
+
+- [Quantum Programming Studio](https://quantum-circuit.com) Web based quantum programming IDE and simulator
+
+- [qasm2pyquil](https://quantum-circuit.com/qasm2pyquil) QASM to pyQuil/Quil online converter
+
+- [example.html](https://quantum-circuit.com/example.html)
+
+
 Using in browser
 ----------------
 
@@ -26,12 +38,6 @@ Simply include [quantum-circuit.min.js](dist/) into your html page (available vi
 </html>
 ```
 
-### Live examples
-
-- [qasm2pyquil](https://quantum-circuit.com/qasm2pyquil) QASM to pyQuil/Quil online converter
-
-- [example.html](https://quantum-circuit.com/example.html)
-
 
 Using at server with node.js
 ----------------------------