We propose to use GaN quantum dots as building blocks of a solid state quantum bit. The existence of a strong built in electric field induced by the spontaneous polarization and by the piezoelectricity is exploited to entangle the states in coupled quantum dots without external fields. The electro-optical response of the coupled GaN quantum dots is investigated theoretically by means of a realistic description of Coulomb-correlated few-electron states, obtained via a direct-diagonalization approach. We show that the built-in electric field in nitrides induces intrinsic dipole–dipole coupling of the order of some milli-electron-volt and thus allows the implementation of quantum information processing. As an example we will implement the quantum XOR gate. Quantum operations are achieved by a sequence of femtosecond multicolor laser pulses.

Intrinsic dipole-dipole excitonic coupling in GaN quantum dots: application to quantum information processing / DE RINALDIS, S.; Rinaldi, R.; Cingolani, R.; D'Amico, I.; Biolatti, Eliana; Rossi, Fausto. - In: PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES. - ISSN 1386-9477. - STAMPA. - 13:2-4(2002), pp. 624-629. [10.1016/S1386-9477(02)00203-5]

Intrinsic dipole-dipole excitonic coupling in GaN quantum dots: application to quantum information processing

BIOLATTI, Eliana;ROSSI, FAUSTO
2002

Abstract

We propose to use GaN quantum dots as building blocks of a solid state quantum bit. The existence of a strong built in electric field induced by the spontaneous polarization and by the piezoelectricity is exploited to entangle the states in coupled quantum dots without external fields. The electro-optical response of the coupled GaN quantum dots is investigated theoretically by means of a realistic description of Coulomb-correlated few-electron states, obtained via a direct-diagonalization approach. We show that the built-in electric field in nitrides induces intrinsic dipole–dipole coupling of the order of some milli-electron-volt and thus allows the implementation of quantum information processing. As an example we will implement the quantum XOR gate. Quantum operations are achieved by a sequence of femtosecond multicolor laser pulses.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/1405249
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