eprintid: 10205174
rev_number: 10
eprint_status: archive
userid: 699
dir: disk0/10/20/51/74
datestamp: 2025-02-24 08:08:16
lastmod: 2025-02-24 08:08:16
status_changed: 2025-02-24 08:08:16
type: article
metadata_visibility: show
sword_depositor: 699
creators_name: Feinstein, Natasha
creators_name: Shalashilin, Ivan
creators_name: Bose, Sougato
creators_name: Warburton, PA
title: Robustness of diabatic enhancement in quantum annealing
ispublished: pub
divisions: UCL
divisions: B04
divisions: C06
divisions: F46
divisions: F64
note: Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 license, https://creativecommons.org/licenses/by/4.0/. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
abstract: In adiabatic quantum annealing, the speed with which an anneal can be run, while still achieving a high final ground state (GS) fidelity, is dictated by the size of the minimum gap that appears between the ground and first excited state in the annealing spectrum. To avoid the exponential slowdown associated with exponentially closing gaps, diabatic transitions to higher energy levels may be exploited in such a way that the system returns to the GS before the end of the anneal. In certain cases, this is facilitated by the original annealing spectrum. However, there are also examples where careful manipulation of the annealing Hamiltonian has been used to alter the spectrum to create a diabatic path to the GS. Since diabatic transitions depend on the evolution rate and the gap sizes in the spectrum, it is important to consider the sensitivity of any potential enhancement to changes in the anneal time as well as any parameters involved in the manipulation of the spectrum. We explore this sensitivity using annealing spectra containing an exponentially closing gap and an additional, tuneable, small gap created by a catalyst. We find that there is a trade-off between the precision needed in the catalyst strength and the anneal time in order to maintain the enhancement to the final GS fidelity.
date: 2025-04
date_type: published
publisher: IOP Publishing Ltd
official_url: https://doi.org/10.1088/2058-9565/adab14
oa_status: green
full_text_type: pub
language: eng
primo: open
primo_central: open_green
verified: verified_manual
elements_id: 2363254
doi: 10.1088/2058-9565/adab14
lyricists_name: Warburton, Paul
lyricists_name: Feinstein, Natasha
lyricists_id: PAWAR27
lyricists_id: NJSFE43
actors_name: Feinstein, Natasha
actors_id: NJSFE43
actors_role: owner
funding_acknowledgements: EP/S021582/1 [Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266]; EP/T001062/1 [Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266]; [EPSRC]
full_text_status: public
publication: Quantum Science and Technology
volume: 10
number: 2
article_number: 025011
pages: 18
issn: 2058-9565
citation:        Feinstein, Natasha;    Shalashilin, Ivan;    Bose, Sougato;    Warburton, PA;      (2025)    Robustness of diabatic enhancement in quantum annealing.                   Quantum Science and Technology , 10  (2)    , Article 025011.  10.1088/2058-9565/adab14 <https://doi.org/10.1088/2058-9565%2Fadab14>.       Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/10205174/1/Feinstein_2025_Quantum_Sci._Technol._10_025011.pdf