Quantum Teleportation Using a Mobile Quantum Circuit Simulator

This article provides additional information about “Lab 16: Quantum Teleportation,” one of the examples introduced in the previous article.

IBM’s Qiskit supports dynamic circuits, allowing a quantum teleportation demonstration to be performed without any manual intervention during execution. Mobile quantum circuit simulators, on the other hand, do not support this feature. Therefore, the required quantum gates must be manually added to Bob’s circuit according to Alice’s measurement results. The procedure is straightforward, however, and produces the same results as Qiskit.

The procedures for both methods are described below. In this example, Alice transfers to Bob the state obtained by applying RY(π/3) followed by RZ(π/6) to the initial state |0>.

🔵 Quantum Teleportation in Qiskit Using Dynamic Circuits

See Fig. 1. Once the dynamic circuit has applied a Z gate, an X gate, or both to Bob’s qubit q2, depending on Alice’s measurement results, q2 is in the state teleported from Alice’s qubit q0.

To verify that the teleportation was successful, the inverse rotations RZ(-π/6)  and RY(-π/3) are then applied to the teleported state, returning it to |0>.

🔵 Quantum Teleportation Using a Mobile Quantum Circuit Simulator

Fig. 2(a) shows the operations performed on Alice’s side using the mobile simulator. These operations produce the measurement result for q1q0.

Fig. 2(b) shows how the appropriate quantum gates are manually added on Bob’s side according to Alice’s measurement result. Further details are provided in the figure.