New publication by QMATH researchers shows how to harness the power of near-term devices
In a paper now published in npj Quantum Information, QMATH members Matthias Christandl and Daniel Stilck França, together with former member Johannes Borregaard, show how to perform computations on small, noisy quantum devices in a more robust and efficient way.
The article “Noise-robust exploration of many-body quantum states on near-term quantum devices”, Matthias Christandl and Daniel Stilck França from QMATH, together with former member Johannes Borregaard, was now published in npj Quantum Information (https://www.nature.com/articles/s41534-021-00363-9).
In this article, the authors show how to use the power of near-term quantum computers more effectively. These devices are expected to be noisy and have only a moderate number of qubits. Thus, it is of fundamental importance to ensure that quantum algorithms can be run reliably under noise and make the most out of every qubit. In this article, the authors show how to estimate physical properties of quantum many-body states in a provably robust way.
Moreover, they can do so using a significantly smaller number of qubits than required to prepare the whole state of interest. This allows for the simulation of large quantum systems on moderately-sized quantum devices. These features of the method described in the article ensure that it has the potential to be used to harness the computational power of noisy near-term quantum devices for applications in the simulation of many-body physics.