Zobrazeno 1 - 10
of 40
pro vyhledávání: '"Nemkov, Nikita A."'
Two main challenges preventing efficient training of variational quantum algorithms and quantum machine learning models are local minima and barren plateaus. Typically, barren plateaus are associated with deep circuits, while shallow circuits have be
Externí odkaz:
http://arxiv.org/abs/2405.05332
Autor:
Kazmina, Alena S., Zalivako, Ilia V., Borisenko, Alexander S., Nemkov, Nikita A., Nikolaeva, Anastasiia S., Simakov, Ilya A., Kuznetsova, Arina V., Egorova, Elena Yu., Galstyan, Kristina P., Semenin, Nikita V., Korolkov, Andrey E., Moskalenko, Ilya N., Abramov, Nikolay N., Besedin, Ilya S., Kalacheva, Daria A., Lubsanov, Viktor B., Bolgar, Aleksey N., Kiktenko, Evgeniy O., Khabarova, Ksenia Yu., Galda, Alexey, Semerikov, Ilya A., Kolachevsky, Nikolay N., Maleeva, Nataliya, Fedorov, Aleksey K.
Publikováno v:
Phys. Rev. A 109, 032619 (2024)
Scalable quantum computers hold the promise to solve hard computational problems, such as prime factorization, combinatorial optimization, simulation of many-body physics, and quantum chemistry. While being key to understanding many real-world phenom
Externí odkaz:
http://arxiv.org/abs/2310.20432
Autor:
Lotkov, Anatolii I., Kurlov, Denis V., Fedorov, Aleksey K., Nemkov, Nikita A., Gritsev, Vladimir
Publikováno v:
Phys. Rev. B 108, 064312 (2023)
Conformal symmetry governs the behavior of closed systems near second-order phase transitions, and is expected to emerge in open systems going through dissipative phase transitions. We propose a framework allowing for a manifest description of confor
Externí odkaz:
http://arxiv.org/abs/2305.01629
Publikováno v:
Phys. Rev. A 108, 032406 (2023)
The Fourier expansion of the loss function in variational quantum algorithms (VQA) contains a wealth of information, yet is generally hard to access. We focus on the class of variational circuits, where constant gates are Clifford gates and parameter
Externí odkaz:
http://arxiv.org/abs/2304.03787
Publikováno v:
Quantum 7, 993 (2023)
We consider the problem of the variational quantum circuit synthesis into a gate set consisting of the CNOT gate and arbitrary single-qubit (1q) gates with the primary target being the minimization of the CNOT count. First we note that along with the
Externí odkaz:
http://arxiv.org/abs/2205.01121
Autor:
Nemkov, Nikita, Fedotov, Vassili
The time derivative of the charge density is linked to the current density by the continuity equation. However, it features only the longitudinal part of a current density, which is known to produce no radiation. This fact usually remains unnoticed t
Externí odkaz:
http://arxiv.org/abs/2201.08333
Autor:
Nemkov, Nikita A.1,2 (AUTHOR), Fedotov, Vassili A.3 (AUTHOR) v.fedotov@skoltech.ru
Publikováno v:
Scientific Reports. 7/19/2024, Vol. 14 Issue 1, p1-8. 8p.
Autor:
Nemkov, Nikita, Ribault, Sylvain
Publikováno v:
SciPost Phys. 11, 089 (2021)
We revisit the critical two-dimensional Ashkin-Teller model, i.e. the $\mathbb{Z}_2$ orbifold of the compactified free boson CFT at $c=1$. We solve the model on the plane by computing its three-point structure constants and proving crossing symmetry
Externí odkaz:
http://arxiv.org/abs/2106.15132
Autor:
Nemkov, Nikita, Klevtsov, Semyon
We consider the generating functional (logarithm of the normalization factor) of the Laughlin state on a sphere, in the limit of a large number of particles $N$. The problem is reformulated in terms of a perturbative expansion of a 2d QFT, resembling
Externí odkaz:
http://arxiv.org/abs/2011.13911
Autor:
Labate, Giuseppe, Ospanova, Anar K., Nemkov, Nikita A., Basharin, Alexey A., Matekovits, Ladislau
In this work, we discuss theoretical findings on the common feature describing nonradiating sources, based on equivalent sources from which it is possible to derive cloaking devices and anapole mode conditions. Starting from the differential form of
Externí odkaz:
http://arxiv.org/abs/1806.04134