Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Usman, M."'
We have computed the global quantum discord and von Neumann entropy of multipartite two-level atomic systems interacting with a single-mode Fock field. We use Tavis-Cumming model. We have explored how quantum correlations and quantum entanglement evo
Externí odkaz:
http://arxiv.org/abs/2303.13234
Autor:
Voisin, B., Ng, K. S. H., Salfi, J., Usman, M., Wong, J. C., Tankasala, A., Johnson, B. C., McCallum, J. C., Hutin, L., Bertrand, B., Vinet, M., Valanoor, N., Simmons, M. Y., Rahman, R., Hollenberg, L. C. L., Rogge, S.
Strain is extensively used to controllably tailor the electronic properties of materials. In the context of indirect band-gap semiconductors such as silicon, strain lifts the valley degeneracy of the six conduction band minima, and by extension the v
Externí odkaz:
http://arxiv.org/abs/2109.08540
Autor:
Voisin, B., Bocquel, J., Tankasala, A., Usman, M., Salfi, J., Rahman, R., Simmons, M. Y., Hollenberg, L. C. L., Rogge, S.
Publikováno v:
Nature Communications 11, 6124 (2020)
Tunneling is a fundamental quantum process with no classical equivalent, which can compete with Coulomb interactions to give rise to complex phenomena. Phosphorus dopants in silicon can be placed with atomic precision to address the different regimes
Externí odkaz:
http://arxiv.org/abs/2105.10931
Autor:
Usman, M., Dunlop, J.
Luby Transform (LT) codes are a class of fountain codes that have proved to perform very efficiently over the erasure channel. These codes are rateless in the sense that an infinite stream of encoded symbols can be generated on the fly. Furthermore,
Externí odkaz:
http://arxiv.org/abs/2002.08604
Autor:
Tsai, A., Aghajamali, A., Dontschuk, N., Johnson, B. C., Usman, M., Schenk, A. K., Sear, M., Pakes, C. I., Hollenberg, L. C. L., McCallum, J. C., Rubanov, S., Tadich, A., Marks, N. A., Stacey, A.
We demonstrate locally coherent heteroepitaxial growth of silicon carbide (SiC) on diamond, a result contrary to current understanding of heterojunctions as the lattice mismatch exceeds $20\%$. High-resolution transmission electron microscopy (HRTEM)
Externí odkaz:
http://arxiv.org/abs/2002.07314
Publikováno v:
Phys. Rev. B 98, 035432 (2018)
This work reports the measurement of electron $g$ factor anisotropy ($| \Delta g |$ = $| g_{001} - g_{1 \bar 1 0} |$) for phosphorous donor qubits in strained silicon (sSi = Si/Si$_{1-x}$Ge$_x$) environments. Multi-million-atom tight-binding simulati
Externí odkaz:
http://arxiv.org/abs/1712.06765
Publikováno v:
Phys. Rev. A 92, 032327 (2015)
We investigate entanglement and quantum phase transition (QPT) in a two-dimensional Heisenberg anisotropic spin-1/2 XY model, using quantum renormalization group method (QRG) on a square lattice of $N\times N$ sites. The entanglement through geometri
Externí odkaz:
http://arxiv.org/abs/1708.03365
Atomic-scale understanding of phosphorous donor wave functions underpins the design and optimisation of silicon based quantum devices. The accuracy of large-scale theoretical methods to compute donor wave functions is dependent on descriptions of cen
Externí odkaz:
http://arxiv.org/abs/1706.09981
Autor:
Salfi, J., Voisin, B., Tankasala, A., Bocquel, J., Usman, M., Simmons, M. Y., Hollenberg, L. C. L., Rahman, R., Rogge, S.
Publikováno v:
Phys. Rev. X 8, 031049 (2018)
Exchange coupling is a key ingredient for spin-based quantum technologies since it can be used to entangle spin qubits and create logical spin qubits. However, the influence of the electronic valley degree of freedom in silicon on exchange interactio
Externí odkaz:
http://arxiv.org/abs/1706.09261
In this article a comparative study of the renormalization of entanglement in one, two and three dimensional space and its relation with quantum phase transition (QPT) near the critical point is presented by implementing the Quantum Renormalization G
Externí odkaz:
http://arxiv.org/abs/1610.00761