Phonon-induced decoherence for a quantum-dot spin qubit operated by Raman passage

2004/04/30 by K. Roszak, Katarzyna Roszak, A. Grodecka +5 · 3 citations
Computer Science · Physics and Astronomy · #Quantum Information and Cryptography #Quantum and electron transport phenomena #Quantum optics and atomic interactions #cond-mat.mes-hall

paper · pdf · doi:10.1103/physrevb.71.195333

published as Phys Rev B 71, 195333 (2005) · Final version; considerable extensions; 18 pages, 7 figures

openalex publication_date 2005/05/01 · arxiv created 2006/07/19 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We study single-qubit gates performed via stimulated Raman adiabatic passage on a spin qubit implemented in a quantum-dot system in the presence of phonons. We analyze the interplay of various kinds of errors resulting from the carrier-phonon interaction (including also the effects of spin-orbit coupling) as well as from quantum jumps related to nonadiabaticity and calculate the fidelity as a function of the pulse parameters. We give quantitative estimates for an InAs∕GaAs system and identify the parameter values for which the error is considerably minimized, even to values below 10^\ensuremath-4 per operation.

Citations

• Coherent population transfer among quantum states of atoms and molecules
• Optimal strategy for a single-qubit gate and the trade-off between opposite types of decoherence
• Zeeman Energy and Spin Relaxation in a One-Electron Quantum Dot

Cited by

• Microscopic theory of phonon-induced effects on semiconductor quantum dot decay dynamics in cavity QED
• Hybrid Solid-State Qubits: The Powerful Role of Electron Spins
• On the indistinguishability of Raman photons