Simulating polaritonic ground states on noisy quantum devices
- URL: http://arxiv.org/abs/2310.02100v1
- Date: Tue, 3 Oct 2023 14:45:54 GMT
- Title: Simulating polaritonic ground states on noisy quantum devices
- Authors: Mohammad Hassan, Fabijan Pavo\v{s}evi\'c, Derek S. Wang, Johannes
Flick
- Abstract summary: We introduce a general framework for simulating electron-photon coupled systems on small, noisy quantum devices.
To achieve chemical accuracy, we exploit various symmetries in qubit reduction methods.
We measure two properties: ground-state energy, fundamentally relevant to chemical reactivity, and photon number.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: The recent advent of quantum algorithms for noisy quantum devices offers a
new route toward simulating strong light-matter interactions of molecules in
optical cavities for polaritonic chemistry. In this work, we introduce a
general framework for simulating electron-photon coupled systems on small,
noisy quantum devices. This method is based on the variational quantum
eigensolver (VQE) with the polaritonic unitary coupled cluster (PUCC) ansatz.
To achieve chemical accuracy, we exploit various symmetries in qubit reduction
methods, such as electron-photon parity, and use recently developed error
mitigation schemes, such as the reference zero-noise extrapolation method. We
explore the robustness of the VQE-PUCC approach across a diverse set of regimes
for the bond length, cavity frequency, and coupling strength of the H$_2$
molecule in an optical cavity. To quantify the performance, we measure two
properties: ground-state energy, fundamentally relevant to chemical reactivity,
and photon number, an experimentally accessible general indicator of
electron-photon correlation.
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