Interactive Quantum Circuits

Components

Registers (with their names) are on the left side.

The numbered qubits are represented by horizontal lines spanning the entire interactive circuit box, with their unique number on the left side.

Gates are represented by coloured rectangles positioned such that they overlap at least one qubit line. For every qubit line that a gate overlaps, that gate involves the corresponding qubit (but does not necessarily change the state of that qubit).

Time progresses towards the right — that is, the gates are applied to the qubits sequentially from left to right.

If two gates are parallel (in time) to each other (not acting upon the same qubits), the true relative order of execution does not matter.

Vertical barrier lines may be inserted to visually separate sections of the circuit. These barriers are purely visual, and do not change the functionality of the circuit in any way.

Selecting gates

To select a gate in the interactive circuit view, left-click on the coloured rectangle that represents the gate. A popup will appear below the gate, with the title of the gate and some brief information about it.

To view more information about the gate, left-click on the title of the gate within the popup. This will take you to a page dedicated to that quantum gate.

Subcircuits

Sometimes a gate will be defined by a quantum circuit, letting smaller quantum circuits be inserted into larger ones.