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of 494
pro vyhledávání: '"Rabinovich D"'
It is well-known that the proximity effect at superconductor/ferromagnet (S/F) interfaces produces damped oscillatory behavior of the Cooper pair wave function within the ferromagnetic regions, which is analogous to the inhomogeneous Fulde-Ferrell-La
Externí odkaz:
http://arxiv.org/abs/2410.10317
Autor:
Akshay, V., Philathong, H., Campos, E., Rabinovich, D., Zacharov, I., Zhang, Xiao-Ming, Biamonte, J.
Variational quantum algorithms are the centerpiece of modern quantum programming. These algorithms involve training parameterized quantum circuits using a classical co-processor, an approach adapted partly from classical machine learning. An importan
Externí odkaz:
http://arxiv.org/abs/2205.01698
Publikováno v:
Mathematics 10(15):2601 (2022)
The Quantum Approximate Optimisation Algorithm is a $p$ layer, time-variable split operator method executed on a quantum processor and driven to convergence by classical outer loop optimisation. The classical co-processor varies individual applicatio
Externí odkaz:
http://arxiv.org/abs/2109.11566
We report that spin supercurrents in magnetic superconductors and superconductor/ferromagnetic insulator bilayers can induce the Dzyaloshinskii-Moriya interaction which strength is proportional to the superconducting order parameter amplitude. This e
Externí odkaz:
http://arxiv.org/abs/2108.08862
Publikováno v:
Phys. Rev. A 104, 030401 (2021)
Quantum Approximate Optimisation (QAOA) is the most studied gate based variational quantum algorithm today. We train QAOA one layer at a time to maximize overlap with an $n$ qubit target state. Doing so we discovered that such training always saturat
Externí odkaz:
http://arxiv.org/abs/2106.13814
Publikováno v:
Physical Review A 104, L010401 (2021)
The quantum approximate optimization algorithm (QAOA) has become a cornerstone of contemporary quantum applications development. In QAOA, a quantum circuit is trained -- by repeatedly adjusting circuit parameters -- to solve a problem. Several recent
Externí odkaz:
http://arxiv.org/abs/2103.11976
Publikováno v:
Phys. Rev. Research 1, 033095 (2019)
The anomalous ground state phase shift in S/AF/S Josephson junctions in the presence of the Rashba SO-coupling is predicted and numerically investigated. It is found to be a consequence of the uncompensated magnetic moment at the S/AF interfaces. The
Externí odkaz:
http://arxiv.org/abs/1907.06208
Publikováno v:
Phys. Rev. B 101, 054517 (2020)
We consider a hybrid structure consisting of superconducting or normal leads with a combined ferromagnet-3D topological insulator interlayer. We compare responses of a Josephson junction and a normal junction to magnetic texture dynamics. In both cas
Externí odkaz:
http://arxiv.org/abs/1904.11193
Publikováno v:
Phys. Rev. Lett. 123, 207001 (2019)
We describe resistive states of the system combining two types of orderings - superconducting and ferromagnetic one. It is shown that in the presence of magnetization dynamics such systems become inherently dissipative and in principle cannot sustain
Externí odkaz:
http://arxiv.org/abs/1904.03449
Publikováno v:
Phys. Rev. B 99, 214501 (2019)
We demonstrate that the hybrid structures consisting of a superconducting layer with an adjacent spin-textured ferromagnet demonstrate the variety of equilibrium magnetoelectric effects originating from coupling between the conduction electron spin a
Externí odkaz:
http://arxiv.org/abs/1811.09304