aiqbench takeQuantum Computing

Researchers have demonstrated that a characterization-based error mitigation technique called QESEM can achieve "chemical accuracy" for molecular simulations on current noisy quantum hardware. By mapping device-specific flaws without relying on biased noise assumptions, the team successfully calculated water molecule energy surfaces within 1.5 milliHartree using existing processors like Aachen. While this proves meaningful potential energy surfaces are attainable today, the method incurs significant computational overhead due to extensive sampling requirements.

Sources coveringQuantum Zeitgeist, Fortune

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Researchers Achieve Chemical Accuracy Using Quantum Error Mitigation

Quantum ZeitgeistSeptember 10, 20264 min read

Raw quantum processor outputs overestimated water’s ground state energy by approximately 500 milliHartree. Implementing an unbiased error correction protocol called QESEM reduced this discrepancy, yielding values within 30 mHa, achieving what is known as “chemical accuracy” of around 1. 5 mHa.

Chemical accuracy, defined as an error threshold of approximately one point five milliHartree, has now been achieved in calculating molecular potential energy surfaces through a new error mitigation technique. Researchers from several Danish and Israeli institutions employed QESEM, a characterisation-based method, on’s Aachen quantum processor to determine the ground-state energies of water molecules with improved precision. An improved error reduction method has successfully been applied to calculations performed on current quantum computers. Using…

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