Multi-spin counter-diabatic driving in many-body quantum Otto refrigerators

Autor: Andreas Hartmann, Victor Mukherjee, Glen Bigan Mbeng, Wolfgang Niedenzu, Wolfgang Lechner

Publikováno v: Quantum, Vol 4, p 377 (2020)

Quantum refrigerators pump heat from a cold to a hot reservoir. In the few-particle regime, counter-diabatic (CD) driving of, originally adiabatic, work-exchange strokes is a promising candidate to overcome the bottleneck of vanishing cooling power.

Externí odkaz: https://doaj.org/article/d5703c08514e498a841d044bd1a7154b

Polynomial scaling of the quantum approximate optimization algorithm for ground-state preparation of the fully connected p -spin ferromagnet in a transverse field

Autor: Matteo M. Wauters, Giuseppe E. Santoro, Glen Bigan Mbeng

Publikováno v: Wauters, M M, Mbeng, G B & Santoro, G E 2020, ' Polynomial scaling of the quantum approximate optimization algorithm for ground-state preparation of the fully connected p-spin ferromagnet in a transverse field ', Physical Review A, vol. 102, no. 6, 062404 . https://doi.org/10.1103/PhysRevA.102.062404

We show that the quantum approximate optimization algorithm (QAOA) can construct, with polynomially scaling resources, the ground state of the fully connected $p$-spin Ising ferromagnet, a problem that notoriously poses severe difficulties to a vanil

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::045392c6403e8d68581cf65c71221bcd
https://curis.ku.dk/portal/da/publications/polynomial-scaling-of-the-quantum-approximate-optimization-algorithm-for-groundstate-preparation-of-the-fully-connected-p-spin-ferromagnet-in-a-transverse-field(304258de-bb6d-4865-91f7-9f66151851fb).html

Optimal working point in digitized quantum annealing

Autor: Giuseppe E. Santoro, Glen Bigan Mbeng, Luca Arceci

Publikováno v: Physical Review B 100 (2019). doi:10.1103/PhysRevB.100.224201
info:cnr-pdr/source/autori:Mbeng G.B.; Arceci L.; Santoro G.E./titolo:Optimal working point in digitized quantum annealing/doi:10.1103%2FPhysRevB.100.224201/rivista:Physical Review B/anno:2019/pagina_da:/pagina_a:/intervallo_pagine:/volume:100

We present a study of the digitized quantum annealing protocol proposed by R. Barends et al. [Nature (London) 534, 222 (2016)]. Our analysis, performed on the benchmark case of a transverse Ising chain problem, shows that the algorithm has a well-def

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ebaf7a1c7aefa20e88cf775b7060e4ab
http://arxiv.org/abs/1909.00817

Dynamics of simulated quantum annealing in random Ising chains

Autor: Lorenzo Privitera, Luca Arceci, Glen Bigan Mbeng, Giuseppe E. Santoro

Publikováno v: Physical Review B 99 (2019). doi:10.1103/PhysRevB.99.064201
info:cnr-pdr/source/autori:Mbeng G.B.; Privitera L.; Arceci L.; Santoro G.E./titolo:Dynamics of simulated quantum annealing in random Ising chains/doi:10.1103%2FPhysRevB.99.064201/rivista:Physical Review B/anno:2019/pagina_da:/pagina_a:/intervallo_pagine:/volume:99

Simulated quantum annealing (SQA) is a classical computational strategy that emulates a quantum annealing (QA) dynamics through a path-integral Monte Carlo whose parameters are changed during the simulation. Here we apply SQA to the one-dimensional t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::786421c19f6f49f2f8e120a7d208beb8
https://publications.cnr.it/doc/424506

Symmetric projected entangled-pair states analysis of a phase transition in coupled spin- 1/2 ladders

Autor: Juraj Hasik, Glen Bigan Mbeng, Sylvain Capponi, Federico Becca, Andreas M. Läuchli

Publikováno v: Phys.Rev.B
Phys.Rev.B, 2022, 106 (12), pp.125154. ⟨10.1103/PhysRevB.106.125154⟩

Infinite projected entangled-pair states (iPEPS) have been introduced to accurately describe many-body wave functions on two-dimensional lattices. In this context, two aspects are crucial: the systematic improvement of the {\it Ansatz} by the optimiz

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e82a77403415bb046b5a08c07c4d2143
https://infoscience.epfl.ch/record/297155