Zobrazeno 1 - 10
of 193
pro vyhledávání: '"Fel’dman, E. B."'
Publikováno v:
Quantum Information Processing, Volume 23, article number 39, (2024)
We analytically investigate the one-excitation spin dynamics in a homogeneous closed spin-1/2 chain via diagonalization of the one-excitation block of the XX-Hamiltonian, which allows to derive the analytical expressions for probability amplitudes de
Externí odkaz:
http://arxiv.org/abs/2401.16902
Autor:
Fel'dman, E. B., Zenchuk, A. I.
Publikováno v:
Physics Letters A v.457 (2023) 128572
The approximation of nearest neighbor interaction (NNI) is widely used in short-time spin dynamics with dipole-dipole interactions (DDI) when the intensity of spin-spin interaction is $\sim 1/r^3$, where $r$ is a distance between those spins. However
Externí odkaz:
http://arxiv.org/abs/2301.09469
Autor:
Fel'dman, E. B., Zenchuk, A. I.
Publikováno v:
Phys. Scr. v.97(9) (2022) 095101
We consider the $M$-neighbor approximation in the problem of one-qubit pure state transfer along the $N$-node zigzag and alternating spin chains governed by the $XXZ$-Hamiltonian with the dipole-dipole interaction. We show that always $M>1$, i.e., th
Externí odkaz:
http://arxiv.org/abs/2301.09464
Publikováno v:
Quantum Inf. Process. V.21, 261 (2022)
In this work, we study transfer of coherence matrices along spin-1/2 chains of various length. Unlike higher order coherence matrices, 0-order coherence matrix can be perfectly transferred if its elements are properly fixed. In certain cases, to prov
Externí odkaz:
http://arxiv.org/abs/2201.01360
Publikováno v:
Physics Letters A 406, 127458 (2021)
A connection of the Wigner-Yanase skew information and multiple quantum (MQ) NMR coherences is considered at different temperatures and evolution times of nuclear spins with dipole-dipole interactions in MQ NMR experiments in solids. It is shown that
Externí odkaz:
http://arxiv.org/abs/2106.01017
Publikováno v:
Applied Magnetic Resonance, v. 53(7-9), pp.1121-1131 (2022)
Dymanics of spin dimers in multiple quantum NMR experiment is studied on the 5-qubit superconducting quantum processor of IBM {Quantum Experience} for the both {pure} ground and thermodynamic equilibrium (mixed) initial states. The work can be consid
Externí odkaz:
http://arxiv.org/abs/2104.13777
Publikováno v:
Quantum Information Processing V.20, (2021) 264
We simulate the evolution of three-node spin chain on the quantum processor of IBM Quantum Experience using the diagonalization of $XX$-Hamiltonian and representing the evolution operator in terms of CNOT operations and one-qubit rotations. We study
Externí odkaz:
http://arxiv.org/abs/2104.13769
Publikováno v:
Physics Letters A 413 (2021) 127605
We develop the protocol for structural restoring of multi-quantum coherence matrices of the multi-qubit quantum state transferred from the sender to the receiver along a spin-1/2 chain. We also propose a protocol for constructing such 0-order coheren
Externí odkaz:
http://arxiv.org/abs/2104.13762
We use multiple quantum (MQ) NMR dynamics of a gas of spin-carrying molecules in nanocavities at high and low temperatures for an investigation of many-particle entanglement. A distribution of MQ NMR intensities is obtained at high and low temperatur
Externí odkaz:
http://arxiv.org/abs/2001.10607
A quantum algorithm for the calculation of $\pi$ is proposed and implemented on the five-qubit IBM quantum computer with superconducting qubits. We find $\pi=3.157\pm0.017$. The error is due to the noise of quantum one-qubit operations and measuremen
Externí odkaz:
http://arxiv.org/abs/1912.12037