Zobrazeno 1 - 10
of 28
pro vyhledávání: '"Day, A. G. R."'
Publikováno v:
Phys. Rev. Lett. 122, 020601 (2019)
We study the problem of preparing a quantum many-body system from an initial to a target state by optimizing the fidelity over the family of bang-bang protocols. We present compelling numerical evidence for a universal spin-glass-like transition cont
Externí odkaz:
http://arxiv.org/abs/1803.10856
Autor:
Mehta, Pankaj, Bukov, Marin, Wang, Ching-Hao, Day, Alexandre G. R., Richardson, Clint, Fisher, Charles K., Schwab, David J.
Publikováno v:
Phyics Reports 810 (2019) 1-124
Machine Learning (ML) is one of the most exciting and dynamic areas of modern research and application. The purpose of this review is to provide an introduction to the core concepts and tools of machine learning in a manner easily understood and intu
Externí odkaz:
http://arxiv.org/abs/1803.08823
Autor:
Bukov, Marin, Day, Alexandre G. R., Weinberg, Phillip, Polkovnikov, Anatoli, Mehta, Pankaj, Sels, Dries
Publikováno v:
Phys. Rev. A 97, 052114 (2018)
We analyze the physics of optimal protocols to prepare a target state with high fidelity in a symmetrically coupled two-qubit system. By varying the protocol duration, we find a discontinuous phase transition, which is characterized by a spontaneous
Externí odkaz:
http://arxiv.org/abs/1711.09109
Autor:
Bukov, Marin, Day, Alexandre G. R., Sels, Dries, Weinberg, Phillip, Polkovnikov, Anatoli, Mehta, Pankaj
Publikováno v:
Phys. Rev. X 8, 031086 (2018)
The ability to prepare a physical system in a desired quantum state is central to many areas of physics such as nuclear magnetic resonance, cold atoms, and quantum computing. Yet, preparing states quickly and with high fidelity remains a formidable c
Externí odkaz:
http://arxiv.org/abs/1705.00565
Publikováno v:
Phys. Rev. B 91, 174424 (2015)
We consider a system of spins on the sites of a three-dimensional pyrochlore lattice of corner-sharing tetrahedra interacting with a predominant effective $xy$ exchange. In particular, we investigate the selection of a long-range ordered state with b
Externí odkaz:
http://arxiv.org/abs/1506.05806
Publikováno v:
Phys. Rev. B 90, 214430 (2014)
We carry out an analytical study of quantum spin ice, a U$(1)$ quantum spin liquid close to the classical spin ice solution for an effective spin $1/2$ model with anisotropic exchange couplings $J_{zz}$, $J_{\pm}$ and $J_{z\pm}$ on the pyrochlore lat
Externí odkaz:
http://arxiv.org/abs/1409.5127
Publikováno v:
Phys. Rev. B 88, 220404(R) (2013)
Several rare earth magnetic pyrochlore materials are well modeled by a spin-1/2 quantum Hamiltonian with anisotropic exchange parameters Js. For the Er2Ti2O7 material, the Js were recently determined from high-field inelastic neutron scattering measu
Externí odkaz:
http://arxiv.org/abs/1305.2935
Publikováno v:
Phys. Rev. Lett. 109, 097205 (2012)
We use numerical linked cluster (NLC) expansions to compute the specific heat, C(T), and entropy, S(T), of a quantum spin ice model of Yb2Ti2O7 using anisotropic exchange interactions recently determined from inelastic neutron scattering measurements
Externí odkaz:
http://arxiv.org/abs/1203.4569
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Akademický článek
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