BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Towards Compact Wavefunctions from Quantum-Selected Configuration 
 Interaction - Tim Weaving and Alexis Ralli\, UCL
DTSTART:20251203T123000Z
DTEND:20251203T140000Z
UID:TALK237826@talks.cam.ac.uk
CONTACT:Chiara Leadbeater
DESCRIPTION:We present a hybrid quantum-classical algorithm that leverages
  Hamiltonian time evolution to guide subspace expansion in the Quantum-Sel
 ected Configuration Interaction (QSCI) framework\, with multireference per
 turbation theory accounting for missed correlation outside the configurati
 on subspace. Using 42 qubits of an IQM superconducting device\, we compute
  the potential energy curve of SiH₄ (6-31G basis) under a stretching of 
 the Si-H bond length and benchmark against Heatbath CI (HCI). While previo
 us QSCI works failed to produce compact wavefunctions\, at stretched geome
 tries we come close to HCI-level compactness\, marking progress towards su
 rpassing this formidable target.
LOCATION:U202 Meeting room\, Department of Chemistry\, Cambridge
END:VEVENT
END:VCALENDAR