Quantum chemistry Quantum optics 7 Hamiltonians 6 Electronic structure 5 Quantum simulations 5 Ground state 4 Calculations 3 Chemical bonds 3 Density functional theory 3 Electronic.structure 3 Excited states 3 Machine learning 3 Quantum computers 3 Quantum theory 3 Quantum transport 3 Qubits 3 Topology 3 'current 2 Atomic orbital 2 Atoms 2 Benchmarking 2 Criticality (nuclear fission) 2 Degrees of freedom (mechanics) 2 Learning algorithms 2 Machine-learning 2 Measurements of 2 Molecules 2 Periodic table 2 Point contacts 2 Potential energy 2