13 papers · 1 filter
Representability for Quantum Theory beyond Particle-Number Conservation
David A. Mazziotti
Representability determines when a two-particle reduced density matrix (2-RDM) corresponds to a physical quantum state, enabling many-particle quantum calculations with 2-RDMs rath…
Size-Consistent Quantum Chemistry on Quantum Computers
Noah Garrett, Michael Rose, David A. Mazziotti
Hybrid quantum-classical algorithms have begun to leverage quantum devices to efficiently represent many-electron wavefunctions, enabling early demonstrations of molecular simulati…
Witnessing Entanglement in Mixed-Particle Quantum Systems
Irma Avdic, David A. Mazziotti
We introduce an entanglement witness that identifies off-diagonal long-range order (ODLRO) -- a distinctive form of entanglement -- in systems containing both fermionic and bosonic…
Entanglement Witnesses of Condensation for Enhanced Quantum Sensing
Lillian I. Payne Torres, Irma Avdic, Anna O. Schouten +3
Quantum phenomena such as entanglement provide powerful resources for enhancing classical sensing. Here, we theoretically show that collective entanglement of spin qubits, arising…
Qumode-Based Variational Quantum Eigensolver for Molecular Excited States
Rishab Dutta, Cameron Cianci, Alexander V. Soudackov +5
We introduce the Qumode Subspace Variational Quantum Eigensolver (QSS-VQE), a hybrid quantum-classical algorithm for computing molecular excited states using the Fock basis of boso…
Many-Body Time Evolution from a Correlation-Efficient Quantum Algorithm
Michael Rose, David A. Mazziotti
We introduce the correlation-efficient time-evolution (CETE) algorithm for simulating quantum many-body dynamics. CETE recasts each step of time evolution as a time-independent cor…