Hohenester, Ulrich and Fabian, Jaroslav and Troiani, Filippo (2006) Adiabatic passage schemes in coupled semiconductor nanostructures. OPTICS COMMUNICATIONS, 264 (2). pp. 426-434. ISSN 0030-4018, 1873-0310
Full text not available from this repository. (Request a copy)Abstract
Adiabatic passage schemes in coupled semiconductor quantum dots are discussed. For optical control, a doped double-dot molecule is proposed as a qubit realization. The quantum information is encoded in the carrier spin, and the flexibility of the molecular structure allows to map the spin degrees of freedom onto the orbital ones and vice versa, which opens the possibility for high-finesse quantum gates by means of stimulated Raman adiabatic passage. For tunnel-coupled dots, adiabatic passage of two correlated electrons in three coupled quantum dots is shown to provide a robust and controlled way of distilling, transporting and detecting spin entanglement, as well as of measuring the rate of spin disentanglement. Employing tunable interdot coupling the scheme creates, from an unentangled two-electron state, a superposition of spatially separated singlet and triplet states, which can be discriminated through a single measurement. Finally, we discuss phonon-assisted dephasing in quantum dots, and present control strategies to suppress such genuine solid-state decoherence losses. (c) 2006 Elsevier B.V. All rights reserved.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | COHERENT POPULATION TRANSFER; QUANTUM DOTS; MOLECULES; STATES; COMPUTATION; RELAXATION; TRANSPORT; SYSTEMS; SPINS; GATE; quantum dots; adiabatic passage; STIRAP; quantum control |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Richter > Group Jaroslav Fabian |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 03 Feb 2021 11:36 |
| Last Modified: | 03 Feb 2021 11:36 |
| URI: | https://pred.uni-regensburg.de/id/eprint/34169 |
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