Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Yaroslav A. Kharkov"'
Publikováno v:
PRX Quantum, Vol 3, Iss 2, p 020317 (2022)
We study the sampling properties of physical realizations of quantum annealers which are implemented through programmable lattices of superconducting flux qubits. Comprehensive statistical analysis of the data produced by these quantum machines shows
Externí odkaz:
https://doaj.org/article/7702fddd4c094534b713afa4c5d90615
Publikováno v:
Phys Rev Lett
We study quantum information scrambling in spin models with both long-range all-to-all and short-range interactions. We argue that a simple global, spatially homogeneous interaction together with local chaotic dynamics is sufficient to give rise to f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a8136610b05e2a92a87396fcb5b403c9
https://doi.org/10.1103/physrevlett.125.130601
https://doi.org/10.1103/physrevlett.125.130601
Publikováno v:
Physical review letters. 126(7)
Quantum annealing (QA) and the quantum approximate optimization algorithm (QAOA) are two special cases of the following control problem: apply a combination of two Hamiltonians to minimize the energy of a quantum state. Which is more effective has re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d1252a14191731e103deacc82b15b00b
https://pubmed.ncbi.nlm.nih.gov/33666474
https://pubmed.ncbi.nlm.nih.gov/33666474
Autor:
Yaroslav A. Kharkov, Oleg P. Sushkov
Publikováno v:
Physical Review B. 100
In the present work we explain the hour-glass magnetic dispersion in underdoped cuprates. The dispersion arises due to the Lifshitz-type magnetic criticality. Superconductivity also plays a role, but the role is secondary. We list six major experimen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b7b0dbded3ed4e309302f01ff7fa1cf3
https://doi.org/10.1103/physrevb.100.224510
https://doi.org/10.1103/physrevb.100.224510
Antiferromagnetic quantum spin systems can exhibit a transition between collinear and spiral ground states, driven by frustration. Classically this is a smooth crossover and the crossover point is termed a Lifshitz point. Quantum fluctuations change
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3d9b488d58aa97bbb48367f3f98942eb
http://arxiv.org/abs/1910.09733
http://arxiv.org/abs/1910.09733
Publikováno v:
Physical Review B. 98
Three decades ago Ioffe and Larkin pointed out a generic mechanism for the formation of a gapped spin liquid. In the case when a classical two-dimensional (2D) frustrated Heisenberg magnet undergoes a Lifshitz transition between a collinear N\'eel ph
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2dc889e45b23fdc408079aa43a21cbad
https://doi.org/10.1103/physrevb.98.144420
https://doi.org/10.1103/physrevb.98.144420
Autor:
Yaroslav A. Kharkov, Oleg P. Sushkov
In the present work we address a long standing problem of the magnetic ground state and magnetic excitations in underdoped cuprates. Modelling cuprates by the extended $t-J$ model we show that there is a hidden dimensionless parameter $\lambda$ which
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::54226d9568c69223b4ed809f73744f72
Autor:
T. Söhnel, Myung-Geun Han, Yan Zhu, Yaroslav A. Kharkov, K. Kato, L. Camacho, Joseph A. Garlow, Kim Kisslinger, Clemens Ulrich, Gaurav Vats, Jan Seidel, Oleg P. Sushkov
Publikováno v:
Microscopy and Microanalysis. 25:30-31
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d78058257d7d929029c074e3ca3a3bab
https://doi.org/10.1017/s1431927619000886
https://doi.org/10.1017/s1431927619000886
Publikováno v:
Physical Review Letters, 119(20):207201. AMER PHYSICAL SOC
We study topological defects in anisotropic ferromagnets with competing interactions near the Lifshitz point. We show that skyrmions and bi-merons are stable in a large part of the phase diagram. We calculate skyrmion-skyrmion and meron-meron interac
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cfbd89ea6bed0c6c4947df1edaf9e65f
https://doi.org/10.1103/physrevlett.119.207201
https://doi.org/10.1103/physrevlett.119.207201
Autor:
Yaroslav A. Kharkov, Yan Qi Qin, Bruce Normand, Zi Yang Meng, Oleg P. Sushkov, Harley D. Scammell
Publikováno v:
Physical Review B. 96
Quantum Monte Carlo simulations offer an unbiased means to study the static and dynamic properties of quantum critical systems, while quantum field theory provides direct analytical results. We study three-dimensional, critical quantum antiferromagne
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8a1ab004cd6c59f086d30dbcd306d232
https://doi.org/10.1103/physrevb.96.174414
https://doi.org/10.1103/physrevb.96.174414