Quantum correlations in molecules: from quantum resourcing to chemical bonding

• URL: http://arxiv.org/abs/2205.15881v2
• Date: Mon, 5 Dec 2022 20:35:02 GMT
• Title: Quantum correlations in molecules: from quantum resourcing to chemical bonding
• Authors: Lexin Ding, Stefan Knecht, Zolt\'an Zimbor\'as, Christian Schilling
• Abstract summary: The second quantum revolution is all about exploiting the quantum nature of atoms and molecules to execute quantum information processing tasks. This work establishes a toolbox for systematically exploring, quantifying and dissecting correlation effects in quantum chemical systems. By utilizing the geometric picture of quantum states we compare -- on a unified basis and in an operationally meaningful way -- total, quantum and classical correlation and entanglement in molecular ground states.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The second quantum revolution is all about exploiting the quantum nature of atoms and molecules to execute quantum information processing tasks. To support this growing endeavor and by anticipating the key role of quantum chemistry therein, our work establishes a toolbox for systematically exploring, quantifying and dissecting correlation effects in quantum chemical systems. By utilizing the geometric picture of quantum states we compare -- on a unified basis and in an operationally meaningful way -- total, quantum and classical correlation and entanglement in molecular ground states. To maximize the quantum informational resourcefulness of molecules an orbital optimization scheme is provided, leading to a paradigm-shifting insight: A single covalent bond equates to the entanglement $2\ln(2)$. This novel and more versatile perspective on electronic structure suggests a generalization of valence bond theory, overcoming deficiencies of modern chemical bonding theories.

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