Quantum Computing with Spin Qubits Interacting Through Delocalized Excitons: Overcoming Hole Mixing

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dc.creatorLovett, Brendon W.
dc.creatorNazir, Ahsan
dc.creatorPazy, Ehoud
dc.creatorBarrett, Sean D.
dc.creatorSpiller, Tim P.
dc.creatorBriggs, G. Andrew D.
dc.date2005-05-09
dc.date2005-10-04
dc.date.accessioned2026-07-07T06:20:55Z
dc.date.available2026-07-07T06:20:55Z
dc.descriptionAs a candidate scheme for controllably coupled qubits, we consider two quantum dots, each doped with a single electron. The spin of the electron defines our qubit basis and trion states can be created by using polarized light; we show that the form of the excited trion depends on the state of the qubit. By using the Luttinger-Kohn Hamiltonian we calculate the form of these trion states in the presence of light-heavy hole mixing, and show that they can interact through both the Förster transfer and static dipole-dipole interactions. Finally, we demonstrate that by using chirped laser pulses, it is possible to perform a two-qubit gate in this system by adiabatically following the eigenstates as a function of laser detuning. These gates are robust in that they operate with any realistic degree of hole mixing, and for either type of trion-trion coupling.
dc.descriptionUpdated with published version, references updated
dc.identifierhttps://arxiv.org/abs/quant-ph/0505055
dc.identifierhttp://arxiv.org/abs/quant-ph/0505055
dc.identifierPhys. Rev. B 72, 115324 (2005)
dc.identifierdoi:10.1103/PhysRevB.72.115324
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/95448
dc.subjectQuantum Physics
dc.titleQuantum Computing with Spin Qubits Interacting Through Delocalized Excitons: Overcoming Hole Mixing
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