Some of the neutral-atom quantum computers, notably those developed Pasqal and QuEra, support what is called an analog mode as well as the more familiar digital mode used in other technologies. Although the analog mode may not be as universally applicable as the digital mode might be, it is also less effected by noise issues. For some computational problems, analog mode may prove to be a better alternative to digital mode by providing an earlier means to reach quantum advantage. The analog mode uses one ground state |g⟩ and one Rydberg state |r⟩, where the quantum dynamics is governed by a Rydberg Hamiltonian H. Commonly used quantum program platforms, such as Qiskit, Cirq, QDK, and others do not support simulating this mode so QuEra decided to create one. They have released their Broqade program under public beta to allow users to simulate quantum processors under the analog mode. Bloqade simulates the time evolution of a quantum state under the Schrödinger equation where the Hamiltonian is the interacting Rydberg Hamiltonian H. The software is open source and uses the Julia language. For more about Bloqade, you can view an announcement posted by QuEra on LinkedIn here, the documentation here, and the GitHub repository for Bloqade here.
July 20, 2022