Restoring Coherence Lost to a Slow Interacting Mesoscopic Spin Bath

2006/04/30 by Wang Yao, Ren‐Bao Liu, Ren-Bao Liu +1 · 12 citations
Computer Science · Physics and Astronomy · #Quantum Information and Cryptography #Quantum and electron transport phenomena #Quantum optics and atomic interactions #cond-mat.mes-hall #quant-ph

paper · pdf · doi:10.1103/physrevlett.98.077602

published as Phys. Rev. Lett. 98, 077602 (2007) · Revised version, with supplementary information

arxiv created 2006/09/13 · openalex publication_date 2007/02/12 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

For a two-state quantum object interacting with a slow mesoscopic interacting spin bath, we show that a many-body solution of the bath dynamics conditioned on the quantum-object state leads to an efficient control scheme to recover the lost quantum-object coherence through disentanglement. We demonstrate the theory with the realistic problem of one electron spin in a bath of many interacting nuclear spins in a semiconductor quantum dot. The spin language can be easily generalized to a quantum object in contact with a bath of interacting multilevel quantum units with the caveat that the bath is mesoscopic and its dynamics is slow compared with the quantum object.

Citations

• Coherent Manipulation of Coupled Electron Spins in Semiconductor Quantum Dots
• Decoherence, einselection, and the quantum origins of the classical
• Inverting Quantum Decoherence by Classical Feedback from the Environment
• Single-shot read-out of an individual electron spin in a quantum dot

Cited by

• Decoherence of coupled electron spins via nuclear spin dynamics in quantum dots
• How to enhance dephasing time in superconducting qubits
• Optimization of short coherent control pulses
• Spin Echo of a Single Electron Spin in a Quantum Dot
• Long-time electron spin storage via dynamical suppression of hyperfine-induced decoherence in a quantum dot
• Exact results on dynamical decoupling by π pulses in quantum information processes
• Rigorous bounds on the performance of a hybrid dynamical-decoupling quantum-computing scheme
• Protection of quantum systems by nested dynamical decoupling
• Coherent population trapping of an electron spin in a single negatively charged quantum dot
• Quenching Spin Decoherence in Diamond through Spin Bath Polarization
• Loss-resistant state teleportation and entanglement swapping using a quantum-dot spin in an optical microcavity
• Quantum computing by optical control of electron spins