Designing Quantum Router in IBM Quantum Computer
Quantum router is an essential ingredient in a quantum network. Here, we
propose a new quantum circuit for designing quantum router by using IBM's
five-qubit quantum computer. We design an equivalent quantum circuit, by the
means of single-qubit and two-qubit quantum gates, which can perform the
operation of a quantum router. Here, we show the routing of signal information
in two different paths (two signal qubits) which is directed by a control
qubit. According to the process of routing, the signal information is found to
be in a coherent superposition of two paths. We demonstrate the quantum nature
of the router by illustrating the entanglement between the control qubit and
the two signal qubits (two paths), and confirm the well preservation of the
signal information in either of the two paths after the routing process. We
perform quantum state tomography to verify the generation of entanglement and
preservation of information. It is found that the experimental results are
obtained with good fidelity.
Bikash K. Behera Tasnum Reza Angad Gupta Prasanta K. Panigrahi