The simulation of distributed quantum algorithms

We study distributed quantum computing (DQC), the use of multiple quantum processing units to simulate quantum circuits and solve quantum algorithms. The nodes of a distributed quantum computer consist of both local qubits, essential for local circuit operations, and communication qubits, extending circuit capabilities across nodes. We created a distributed quantum circuit simulator (DQCS) written in Qiskit, which we use to simulate a quantum circuit on multiple nodes, show its applicability for distributed quantum phase estimation, amplitude estimation. We use DQCS to study the scaling of DQC for the quantum state preparation of a probability distribution.