Zobrazeno 1 - 10
of 20
pro vyhledávání: '"Wesenberg, Janus H."'
Publikováno v:
New Journal of Physics 13 (2011) 115011
We present a detailed study of quantum simulations of coupled spin systems in surface-electrode ion-trap arrays, and illustrate our findings with a proposed implementation of the hexagonal Kitaev model [A. Kitaev, Annals of Physics 321,2 (2006)]. The
Externí odkaz:
http://arxiv.org/abs/1107.0181
Publikováno v:
Phys. Rev. A 83, 023826 (2011)
We study the excitation dynamics of an inhomogeneously broadened spin ensemble coupled to a single cavity mode. The collective excitations of the spin ensemble can be described in terms of generalized spin waves and, in the absence of the cavity, the
Externí odkaz:
http://arxiv.org/abs/1008.5197
Autor:
Wu, Hua, George, Richard E., Ardavan, Arzhang, Wesenberg, Janus H., Mølmer, Klaus, Schuster, David I., Schoelkopf, Robert J., Itoh, Kohei M., Morton, John J. L., Briggs, G. Andrew D.
Publikováno v:
Phys. Rev. Lett. 105, 140503 (2010)
Electron and nuclear spins have good coherence times and an ensemble of spins is a promising candidate for a quantum memory. By employing holographic techniques via field gradients a single ensemble may be used to store many bits of information. Here
Externí odkaz:
http://arxiv.org/abs/0908.0101
Publikováno v:
Phys. Rev. Lett. 102, 233002 (2009)
Trapped ions offer long internal state (spin) coherence times and strong inter-particle interactions mediated by the Coulomb force. This makes them interesting candidates for quantum simulation of coupled lattices. To this end it is desirable to be a
Externí odkaz:
http://arxiv.org/abs/0902.1686
Autor:
Wesenberg, Janus H.
Publikováno v:
Phys. Rev. A 78, 063410 (2008)
Surface-electrode (SE) rf traps are a promising approach to manufacturing complex ion-trap networks suitable for large-scale quantum information processing. In this paper we present analytical methods for modeling SE traps in the gapless plane approx
Externí odkaz:
http://arxiv.org/abs/0808.1623
Autor:
Wesenberg, Janus H.
Publikováno v:
Phys. Rev. A 79, 013416 (2009)
We investigate the possible form of ideal intersections for two-dimensional rf trap networks suitable for quantum information processing with trapped ions. We show that the lowest order multipole component of the rf field that can contribute to an id
Externí odkaz:
http://arxiv.org/abs/0802.3162
Publikováno v:
Phys. Rev. A, 75, 012304 (2007)
Due to inhomogeneous broadening, the absorption lines of rare-earth-ion dopands in crystals are many order of magnitudes wider than the homogeneous linewidths. Several ways have been proposed to use ions with different inhomogeneous shifts as qubit r
Externí odkaz:
http://arxiv.org/abs/quant-ph/0601141
Autor:
Wesenberg, Janus H., Molmer, Klaus
Publikováno v:
Phys. Rev. Lett. 93, 143903 (2004)
We determine the probability distribution for the field inside a random uniform distribution of electric or magnetic dipoles. For parallel dipoles, simulations and an analytical derivation show that although the average contribution from any spherica
Externí odkaz:
http://arxiv.org/abs/quant-ph/0406178
Autor:
Wesenberg, Janus H.
Publikováno v:
Phys. Rev. A 69, 042323 (2004)
Quantum information processing systems are often operated through time dependent controls; choosing these controls in a way that makes the resulting operation insensitive to variations in unknown or uncontrollable system parameters is an important pr
Externí odkaz:
http://arxiv.org/abs/quant-ph/0312076
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