Zobrazeno 1 - 10
of 51
pro vyhledávání: '"Meerovich, V. M."'
We show that the operators and the quadrupole and Zeeman Hamiltonians for a spin (3/2) can be represented in terms for a system of two coupling fictitious spins (1/2) using the Kronecker product of Pauli matrices. Particularly, the quadrupole Hamilto
Externí odkaz:
http://arxiv.org/abs/1707.02407
We investigate analytically and numerically the Multiple Quantum (MQ) NMR dynamics in dipolar ordered spin systems of nuclear spins 1/2 at a low temperatures. We suggest two different methods of MQ NMR. One of them is based on the measurement of the
Externí odkaz:
http://arxiv.org/abs/1309.5591
Publikováno v:
J. Phys. A: Math. Theor. 46 (2013) 135303
An isolated spin system that is in internal thermodynamic equilibrium and that has an upper limit to its allowed energy states can possess a negative temperature. We calculate the thermodynamic characteristics and the concurrence in this system over
Externí odkaz:
http://arxiv.org/abs/1302.5232
We study entanglement between quantum states of multi level spin system of a single particle considering a nucleus with spin 3/2 in both the internal electric field gradient and the external magnetic field. It was shown that entanglement is achieved
Externí odkaz:
http://arxiv.org/abs/1005.2886
Entanglement of dipole-dipole interacting spins 1/2 is usually investigated when the energy of interaction with an external magnetic field (the Zeeman energy) is greater than the energy of dipole interactions by three orders. Under this condition onl
Externí odkaz:
http://arxiv.org/abs/1003.1540
With the purpose to reveal consistency between multiple quantum (MQ) coherences and entanglement, we investigate numerically the dynamics of these phenomena in one-dimensional linear chains and ring of nuclear spins 1/2 coupled by dipole dipole inter
Externí odkaz:
http://arxiv.org/abs/0905.3826
We established important relationships between entanglement measures and the order parameter (spin polarization) in nuclear spin systems controlled by the nuclear magnetic resonance (NMR) technique. Since spin polarization can be easily manipulated b
Externí odkaz:
http://arxiv.org/abs/0810.4388
We investigate numerically the time dependence of the multiple quantum coherences and entanglement in linear chains up to nine nuclear spins of 1/2 coupled by the dipole-dipole interactions. Two models are considered: (1) a spin chain with nearest-ne
Externí odkaz:
http://arxiv.org/abs/0809.1049
The evolution of entanglement in a one-dimensional Ising chain is numerically studied under various initial conditions. We analyze two problems concerning the dynamics of the entanglement: (i) generation of the entanglement from the pseudopure separa
Externí odkaz:
http://arxiv.org/abs/0805.3396
Autor:
Furman, G. B., Goren, S. D., Lee, J. -S., Khitrin, A. K., Meerovich, V. M., Sokolovsky, V. L.
Stimulated wave of polarization, triggered by a flip of a single spin, presents a simple model of quantum amplification. Previously, it has been found that such wave can be excited in a 1D Ising chain with nearest-neighbor interactions, irradiated by
Externí odkaz:
http://arxiv.org/abs/quant-ph/0603049