Two-Qubit State Tomography using a Joint Dispersive Read-Out

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dc.creatorFilipp, S.
dc.creatorMaurer, P.
dc.creatorLeek, P. J.
dc.creatorBaur, M.
dc.creatorBianchetti, R.
dc.creatorFink, J. M.
dc.creatorGöppl, M.
dc.creatorSteffen, L.
dc.creatorGambetta, J. M.
dc.creatorBlais, A.
dc.creatorWallraff, A.
dc.date2008-12-15
dc.date.accessioned2026-07-07T13:17:13Z
dc.date.available2026-07-07T13:17:13Z
dc.descriptionQuantum state tomography is an important tool in quantum information science for complete characterization of multi-qubit states and their correlations. Here we report a method to perform a joint simultaneous read-out of two superconducting qubits dispersively coupled to the same mode of a microwave transmission line resonator. The non-linear dependence of the resonator transmission on the qubit state dependent cavity frequency allows us to extract the full two-qubit correlations without the need for single shot read-out of individual qubits. We employ standard tomographic techniques to reconstruct the density matrix of two-qubit quantum states.
dc.description4 pages, 4 figures, version with high resolution figures available at http://qudev.ethz.ch/content/science/PubsPapers.html
dc.identifierhttps://arxiv.org/abs/0812.2485
dc.identifierhttp://arxiv.org/abs/0812.2485
dc.identifierPhys. Rev. Lett 102, 200402 (2009)
dc.identifierdoi:10.1103/PhysRevLett.102.200402
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/231039
dc.subjectMesoscale and Nanoscale Physics
dc.subjectSuperconductivity
dc.subjectQuantum Physics
dc.titleTwo-Qubit State Tomography using a Joint Dispersive Read-Out
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