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Publikováno v:
Phys. Rev. B 84, 075113 (2010)
We propose and implement a particularly effective method for calculating the Berry curvature arising from adiabatic evolution of Bloch states in wave vector k space. The method exploits a unique feature of the Korringa-Kohn-Rostoker (KKR) approach to
Externí odkaz:
http://arxiv.org/abs/1104.3027
Autor:
Jarvis, C. E. A., Rodrigues, D. A., Györffy, B. L., Spiller, T. P., Short, A. J., Annett, J. F.
We study the time evolution of $N_q$ two-level atoms (or qubits) interacting with a single mode of the quantised radiation field. In the case of two qubits, we show that for a set of initial conditions the reduced density matrix of the atomic system
Externí odkaz:
http://arxiv.org/abs/0906.4005
Autor:
Jarvis, C. E. A., Rodrigues, D. A., Györffy, B. L., Spiller, T. P., Short, A. J., Annett, J. F.
We study the dynamics of the Jaynes-Cummings Model for an array of $N_q$ two level systems (or qubits) interacting with a quantized single mode electromagnetic cavity (or quantum bus). For an initial cavity coherent state $| \alpha >$ and the qubit s
Externí odkaz:
http://arxiv.org/abs/0812.3766
Autor:
Jarvis, C. E. A., Rodrigues, D. A., Györffy, B. L., Spiller, T. P., Short, A. J., Annett, J. F.
We study the dynamics of the Jaynes-Cummings Model for two level systems (or qubits) interacting with a quantized single mode electromagnetic cavity (or `quantum bus'). We show that there is a time in between the collapse and revival of Rabi oscillat
Externí odkaz:
http://arxiv.org/abs/0809.2025
In zero magnetic field the superconductor Sr$_2$RuO$_4$ is believed to have a chiral spin triplet pairing state in which the gap function d-vector is aligned along the crystal c-axis. Using a phenomenological but orbital specific description of the s
Externí odkaz:
http://arxiv.org/abs/0804.4458
Publikováno v:
J. Phys.: Condens. Matter 19 (2007) 436211.
The quantised Josephson junction equation that underpins the behaviour of charge qubits and other tunnel devices is usually derived through cannonical quantisation of the classical macroscopic Josephson relations. However, this approach may neglect e
Externí odkaz:
http://arxiv.org/abs/0709.3460
Publikováno v:
J. Phys.: Condens. Matter, 20, (2008), 075211
We present a scheme by which projective homodyne measurement of a microwave resonator can be used to generate entanglement between two superconducting charge qubits coupled to this resonator. The non-interacting qubits are initialised in a product of
Externí odkaz:
http://arxiv.org/abs/0708.2880
Autor:
Lüders, M., Ernst, A., Däne, M., Szotek, Z., Svane, A., Ködderitzsch, D., Hergert, W., Györffy, B. L., Temmerman, W. M.
Publikováno v:
Phys. Rev. B 71, 205109 (2005)
We propose a simplified version of self-interaction corrected local spin-density (SIC-LSD) approximation, based on multiple scattering theory, which implements self-interaction correction locally, within the KKR method. The multiple scattering aspect
Externí odkaz:
http://arxiv.org/abs/cond-mat/0406515
Autor:
Holmström, Erik, Bergman, Anders, Nordström, Lars, Dugdale, S. B., Abrikosov, I., Györffy, B. L.
The oscillating magnetic interlayer coupling of Fe over spacer layers consisting of Cu$_{x}$Pd$_{1-x}$ alloys is investigated by first principles density functional theory. The amplitude, period and phase of the coupling, as well as the disorder-indu
Externí odkaz:
http://arxiv.org/abs/cond-mat/0402093