Qibo: a framework for quantum simulation with hardware acceleration

Abstract

We present Qibo, a new open-source software for fast evaluation of quantum circuits and adiabatic evolution which takes full advantage of hardware accelerators. The growing interest in quantum computing and the recent developments of quantum hardware devices motivates the development of new advanced computational tools focused on performance and usage simplicity. In this work we introduce a new quantum simulation framework that enables developers to delegate all complicated aspects of hardware or platform implementation to the library so they can focus on the problem and quantum algorithms at hand. This software is designed from scratch with simulation performance, code simplicity and user friendly interface as target goals. It takes advantage of hardware acceleration such as multi-threading CPU, single GPU and multi-GPU devices.

Variational Quantum Eigensolver for SU($N$) Fermions

“…We have simulated the quantum circuits using the Qibo API [42,43], disregarding the influence of noise and the impact of finite sampling. The classical optimization technique employed in the quantum-classical loop is the BFGS method [44], a gradient-based approach, which in- volves the computation inverse Hessian matrix.…”

A Feasible Approach for Automatically Differentiable Unitary Coupled-Cluster on Quantum Computers

“…The developed techniques combined with tequilas automatic differentiation framework provide a testbed for quantum chemistry on quantum computers where new ideas, like low-depth approaches based on pair-natural orbitals [48] or Krylov subspaces [67,68], can be prototyped and demonstrated in a blackboard fashion. Our implementation provides an easy to use, automatically differentiable framework for unitary-coupled cluster, that leverages state of the art high performance simulators [52,53] and is ready for emerging quantum computers. We demonstrated initial applications for ground and excited state calculations for small model systems where we extended adaptive circuit construction schemes and, for the first time, applied them to excited state optimization.…”

“…Our implementation is inspired by various open-source packages such as madness [50], pennylane [25], and diffiqult [51], that are not focused on unitary coupled-cluster, but offer intuitive application programming interfaces, exposing, often highly specialized, numerical algorithms to a broad audience of interested scientists. tequila leverages state of the art high-performance simulators [52,53], quantum chemistry software [50,54,55] and jax [56] for extended automatic differentiation techniques. Given that access rights are permitted, tequila can furthermore access state of the art quantum computers.…”

ICARUS-Q: Integrated Control and Readout Unit for Scalable Quantum Processors

“…Finally, the currently layout will be interfaced to the Qibo framework [47] in order to automate the process of circuit execution.…”