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SUMMARY:Heisenberg picture simulation of two-dimensional dynamics and its 
 compression
DTSTART:20260610T080000Z
DTEND:20260610T090000Z
DTSTAMP:20260626T051300Z
UID:indico-event-18959@indico.psi.ch
CONTACT:andreas.elben@psi.ch\;cornelius.hempel@psi.ch
DESCRIPTION:Speakers: Juan Carrasquilla (ETHZ)\n\nQuantum algorithms for t
 he dynamics of quantum systems typically require deep quantum circuits who
 se accuracy is compromised by noise and imperfections in near-term hardwar
 e. Thus\, reducing the depth of such quantum circuits to shallower ones wh
 ile retaining high accuracy is critical for quantum simulation. Variationa
 l quantum compilation methods offer a promising path forward\, yet a core 
 difficulty persists: ensuring that a variational ansatz V faithfully appro
 ximates a target unitary U. We leverage Pauli propagation techniques to de
 velop a strategy for compressing circuits that implement the dynamics of 
 large two-dimensional (2D) quantum systems and beyond. As a concrete demon
 stration\, we compress the dynamics of systems up to 30 × 30 qubits and a
 chieve up to > 1000 times improvement in accuracy that surpasses standard 
 Trotterization methods at identical circuit depths. To experimentally vali
 date our approach\, we execute the compressed circuits on Quantinuum’s H
 1 quantum processor\; we observe that\, even with device noise\, the measu
 red physical observables are an order of magnitude more accurate than thos
 e obtained from Trotterized circuits with the same circuit depth. Our high
 -dimensional circuit compression scheme brings us one step closer to a pra
 ctical quantum advantage by allowing longer simulation times at reduced ci
 rcuit depths and unlocks the exploration of large families of hardware-fri
 endly ansätze. \n\nhttps://indico.psi.ch/event/18959/
LOCATION:ODRA/111
URL:https://indico.psi.ch/event/18959/
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