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APS » Journals » Phys. Rev. B » Volume 67 » Issue 12
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Phys. Rev. B 67, 121307(R) (2003) [4 pages]

Semiconductor-based geometrical quantum gates

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Paolo Solinas1, Paolo Zanardi2, Nino Zanghì1, and Fausto Rossi2,3
1Istituto Nazionale di Fisica Nucleare (INFN) and Dipartimento di Fisica, Università di Genova, Via Dodecaneso 33, 16146 Genova, Italy
2Institute for Scientific Interchange (ISI), Viale Settimio Severo 65, 10133 Torino, Italy
3Istituto Nazionale per la Fisica della Materia (INFM) and Dipartimento di Fisica, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy

Received 4 February 2003; published 26 March 2003

We propose an implementation scheme for holonomic, i.e., geometrical, quantum information processing based on semiconductor nanostructures. Our quantum hardware consists of coupled semiconductor macroatoms addressed/controlled by ultrafast multicolor laser-pulse sequences. More specifically, logical qubits are encoded in excitonic states with different spin polarizations and manipulated by adiabatic time control of the laser amplitudes. The two-qubit gate is realized in a geometric fashion by exploiting dipole-dipole coupling between excitons in neighboring quantum dots.

© 2003 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.67.121307
DOI:
10.1103/PhysRevB.67.121307
PACS:
78.67.Hc, 03.67.Lx
 
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