TY - JOUR
T1 - Noise-robust exploration of many-body quantum states on near-term quantum devices
AU - Borregaard, Johannes
AU - Christandl, Matthias
AU - Stilck França, Daniel
PY - 2021
Y1 - 2021
N2 - We describe a resource-efficient approach to studying many-body quantum states on noisy, intermediate-scale quantum devices. We employ a sequential generation model that allows us to bound the range of correlations in the resulting many-body quantum states. From this, we characterize situations where the estimation of local observables does not require the preparation of the entire state. Instead smaller patches of the state can be generated from which the observables can be estimated. This can potentially reduce circuit size and number of qubits for the computation of physical properties of the states. Moreover, we show that the effect of noise decreases along the computation. Our results apply to a broad class of widely studied tensor network states and can be directly applied to near-term implementations of variational quantum algorithms.
AB - We describe a resource-efficient approach to studying many-body quantum states on noisy, intermediate-scale quantum devices. We employ a sequential generation model that allows us to bound the range of correlations in the resulting many-body quantum states. From this, we characterize situations where the estimation of local observables does not require the preparation of the entire state. Instead smaller patches of the state can be generated from which the observables can be estimated. This can potentially reduce circuit size and number of qubits for the computation of physical properties of the states. Moreover, we show that the effect of noise decreases along the computation. Our results apply to a broad class of widely studied tensor network states and can be directly applied to near-term implementations of variational quantum algorithms.
U2 - 10.1038/s41534-021-00363-9
DO - 10.1038/s41534-021-00363-9
M3 - Journal article
VL - 7
JO - npj Quantum Information
JF - npj Quantum Information
SN - 2056-6387
M1 - 45
ER -