Few-body spin couplings and their implications for universal quantum computation

Simple item page
dc.creatorWoodworth, Ryan
dc.creatorMizel, Ari
dc.creatorLidar, Daniel A.
dc.date2005-04-21
dc.date2005-06-18
dc.date.accessioned2026-07-07T07:41:33Z
dc.date.available2026-07-07T07:41:33Z
dc.descriptionElectron spins in semiconductor quantum dots are promising candidates for the experimental realization of solid-state qubits. We analyze the dynamics of a system of three qubits arranged in a linear geometry and a system of four qubits arranged in a square geometry. Calculations are performed for several quantum dot confining potentials. In the three-qubit case, three-body effects are identified that have an important quantitative influence upon quantum computation. In the four-qubit case, the full Hamiltonian is found to include both three-body and four-body interactions that significantly influence the dynamics in physically relevant parameter regimes. We consider the implications of these results for the encoded universality paradigm applied to the four-electron qubit code; in particular, we consider what is required to circumvent the four-body effects in an encoded system (four spins per encoded qubit) by the appropriate tuning of experimental parameters.
dc.description1st version: 33 pages, 25 figures. Described at APS March Meeting in 2004 (P36.010) and 2005 (B17.00009). Most figures made uglier here to reduce file size. 2nd version: 19 pages, 9 figures. Much mathematical detail chopped away after hearing from journal referee; a few typos corrected
dc.identifierhttps://arxiv.org/abs/quant-ph/0504165
dc.identifierhttp://arxiv.org/abs/quant-ph/0504165
dc.identifierJ. Phys. Cond. Mat. 18, S721 (2006)
dc.identifierdoi:10.1088/0953-8984/18/21/S02
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/122153
dc.subjectQuantum Physics
dc.titleFew-body spin couplings and their implications for universal quantum computation
dc.typetext

Files

Collections

arXiv