Zobrazeno 1 - 10
of 74
pro vyhledávání: '"Kuzmak, A. R."'
Autor:
Kuzmak, A. R., Tkachuk, V. M.
We propose a protocol for studying the purely imaginary Fisher zeros of the Ising model on a quantum computer. Our protocol is based on the direct relation between the partition function for purely imaginary temperature and the evolution operator of
Externí odkaz:
http://arxiv.org/abs/2311.14453
Autor:
Kuzmak, A. R.
Publikováno v:
Annals of Physics 455, 169397 (2023)
The preparation of entangled quantum states is an inherent and indispensable step for the implementation of many quantum information algorithms. Depending on the physical system, there are different ways to control and measure them, which allow one t
Externí odkaz:
http://arxiv.org/abs/2307.02266
Autor:
Kuzmak, A. R.
Publikováno v:
J. Phys. A: Math. Theor. 56, 165302 (2023)
In the last two decades, magnetic, thermodynamic properties and bipartite thermal entanglement in diamond spin clusters and chains have been studied. Such spin structures are presented in various compounds. The ions of $Cu^{2+}$ in the natural minera
Externí odkaz:
http://arxiv.org/abs/2303.15955
Autor:
Kuzmak, A. R., Tkachuk, V. M.
Publikováno v:
EPL 144, 38001 (2023)
We consider simulation of the high spins on a quantum computer. The protocols which allow one to measure the mean value of spin and correlations between spins are proposed. As a result, we determine the time dependence of the mean values of spin-1 in
Externí odkaz:
http://arxiv.org/abs/2205.10800
Autor:
Kuzmak, A. R.
Publikováno v:
Quantum Information Processing 20, 269 (2021)
We propose protocols for determining the distances in Hilbert space between pure and mixed quantum states prepared on a quantum computer. In the case of pure quantum states, the protocol is based on measuring the square of modulus of scalar product b
Externí odkaz:
http://arxiv.org/abs/2103.05301
Autor:
Kuzmak, A. R., Tkachuk, V. M.
Publikováno v:
Condens. Matter Phys., 2020, vol. 23, No, 4, 43001
We study the entanglement between a certain qubit and the remaining system in the Schr\"odinger cat state prepared on the ibmq-melbourne quantum computer. The protocol, which we use for this purpose, is based on the determination of the mean value of
Externí odkaz:
http://arxiv.org/abs/2101.05089
Autor:
Kuzmak, A. R., Tkachuk, V. M.
Publikováno v:
The European Physical Journal Plus 136, 564 (2021)
We study the entanglement between a certain qubit and the remaining system in rank- 2 mixed states prepared on the quantum computer. The protocol, which we propose for this purpose, is based on the relation of geometric measure of entanglement with c
Externí odkaz:
http://arxiv.org/abs/2010.06242
Autor:
Kuzmak, A. R., Tkachuk, V. M.
Publikováno v:
Physics Letters A 384, 126579 (2020)
We implement a protocol to determine the degree of entanglement between a qubit and the rest of the system on a quantum computer. The protocol is based on results obtained in paper [Frydryszak et al. (2017)]. This protocol is tested on a 5-qubit supe
Externí odkaz:
http://arxiv.org/abs/2003.01011
Autor:
Kuzmak, A. R.
Publikováno v:
Phys. Scr. 95 (2020) 035403 (8pp)
The method for preparation of a two-qubit state on two spins-1/2 that mutually interact through an auxiliary spin is proposed. The essence of the method is that, initially, the three spins evolve under the action of an external magnetic field during
Externí odkaz:
http://arxiv.org/abs/1905.07281
Autor:
Kuzmak, A. R., Tkachuk, V. M.
Publikováno v:
J. Phys. B: At. Mol. Opt. Phys. 52, 205501 (2019)
We study the Lee-Yang zeros of the ferromagnetic Ising bath via the interaction with the two probe spins. Similarly as in paper [Bo-Bo Wei, Ren-Bao Liu, Phys. Rev. Lett. 109, 185701 (2012)] the problem of detecting the zeros is reduced to the explora
Externí odkaz:
http://arxiv.org/abs/1903.11108