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X-WR-CALNAME:[ICQ] Enrique Rico Ortega (Bilbao\, University of the Basque C
 ountry UPV/EHU) Noise-aware variational eigensolvers: a dissipative route 
 for lattice gauge theories
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TZUNTIL:20260329T010000Z
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DTSTART:20231029T030000
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TZOFFSETTO:+0100
RDATE:20241027T030000
RDATE:20251026T030000
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DTSTAMP:20260510T233015Z
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DESCRIPTION:We propose a novel variational ansatz for the ground-state prep
 aration of the ℤ2 lattice gauge theory (LGT) in quantum simulators. It com
 bines dissipative and unitary operations in a completely deterministic sch
 eme with a circuit depth that does not scale with the size of the consider
 ed lattice. We find that\, with very few variational parameters\, the ansa
 tz can achieve >99% precision in energy in both the confined and deconfine
 d phase of the ℤ2 LGT. We benchmark our proposal against the unitary Hamil
 tonian variational ansatz and find a clear advantage of our scheme\, espec
 ially when focusing on the nature of the confinement-deconfinement transit
 ion of the ℤ2 LGT. After performing a finite-size scaling analysis\, we sh
 ow that our dissipative variational ansatz can predict critical exponents 
 with reasonable accuracies even for reduced qubit numbers and circuit dept
 hs. Furthermore\, we investigate the performance of this variational eigen
 solver subject to circuit-level noise\, determining variational error thre
 sholds that fix the error rate pℓ below which pℓ. In light of these quanti
 ties and for typical gate errors p in current quantum processors\, we prov
 ide a detailed assessment of the prospects of our scheme to explore the ℤ2
  LGT on near-term devices. \n\narXiv:2308.03618 \n\n\nhttps://combalgo.lab
 ri.fr/pmwiki.php/Groupe/Info-Quantique
DTSTART;TZID=Europe/Paris:20240528T140000
DTEND;TZID=Europe/Paris:20240528T150000
LOCATION:Room 001 in building A29
SEQUENCE:0
SUMMARY:[ICQ] Enrique Rico Ortega (Bilbao\, University of the Basque Countr
 y UPV/EHU) Noise-aware variational eigensolvers: a dissipative route for l
 attice gauge theories
TRANSP:OPAQUE
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