The Heisenberg antiferromagnet on the square
... the first magnetic excitation. Various possible ground state phases, such as valence bond solids, gapped spin liquids of different kinds as well as stable critical phases are under discussion, see e. g. [11,35,37,41–48]. On the other hand, for the star lattice one meets a so-called explicit valence- ...
... the first magnetic excitation. Various possible ground state phases, such as valence bond solids, gapped spin liquids of different kinds as well as stable critical phases are under discussion, see e. g. [11,35,37,41–48]. On the other hand, for the star lattice one meets a so-called explicit valence- ...
Theoretical studies of frustrated magnets with dipolar interactions
... extent, such models are able to qualitatively expose many experimentally observed phenomena. But often, to account for complex behavior of magnetic matter, such models have to be refined by including more terms in Hamiltonian. The compound LiHox Y1−x F4 , by increasing concentration of nonmagnetic y ...
... extent, such models are able to qualitatively expose many experimentally observed phenomena. But often, to account for complex behavior of magnetic matter, such models have to be refined by including more terms in Hamiltonian. The compound LiHox Y1−x F4 , by increasing concentration of nonmagnetic y ...
Colloquium: Physics of optical lattice clocks
... atoms. Reducing the velocities additionally increases interrogation time thereby improving the Fourier-limited spectral resolution. Presently, we may distinguish between two types of competing optical clocks working with trapped species: ion clocks and optical lattice clocks. In ion clocks an ion is ...
... atoms. Reducing the velocities additionally increases interrogation time thereby improving the Fourier-limited spectral resolution. Presently, we may distinguish between two types of competing optical clocks working with trapped species: ion clocks and optical lattice clocks. In ion clocks an ion is ...
Controlling electron quantum dot qubits by spin
... the electron spin. In the first part, we study the energy spectrum of the quantum dot. The differences of eigenenergies give frequencies of inherent oscillations of eigenstate superpositions (such as tunneling in symmetric double quantum dots, or spin precession in magnetic field). Resonant frequenc ...
... the electron spin. In the first part, we study the energy spectrum of the quantum dot. The differences of eigenenergies give frequencies of inherent oscillations of eigenstate superpositions (such as tunneling in symmetric double quantum dots, or spin precession in magnetic field). Resonant frequenc ...
Nitrogen-vacancy center
The nitrogen-vacancy center (N-V center) is one of numerous point defects in diamond. Its most explored and useful property is photoluminescence, which can be easily detected from an individual N-V center, especially those in the negative charge state (N-V−). Electron spins at N-V centers, localized at atomic scales, can be manipulated at room temperature by applying a magnetic field, electric field, microwave radiation or light, or a combination, resulting in sharp resonances in the intensity and wavelength of the photoluminescence. These resonances can be explained in terms of electron spin related phenomena such as quantum entanglement, spin-orbit interaction and Rabi oscillations, and analysed using advanced quantum optics theory. An individual N-V center can be viewed as a basic unit of a quantum computer, and it has potential applications in novel, more efficient fields of electronics and computational science including quantum cryptography and spintronics.