Abstract

According to quantum mechanics, a many-particle system is allowed to exhibit non-local behaviour, in that measurements performed on one of the particles can affect a second one that is far away. These so-called entangled states are crucial for the implementation of most quantum information protocols and, in particular, gates for quantum computation. Here we use ultrafast optical pulses and coherent techniques to create and control spin-entangled states in an ensemble of non-interacting electrons bound to donors (at least three) and at least two Mn2+ ions in a CdTe quantum well. Our method, relying on the exchange interaction between localized excitons and paramagnetic impurities, can in principle be applied to entangle an arbitrarily large number of spins.

Keywords

PhysicsQuantum entanglementSpinsQuantum mechanicsQuantum computerSpin (aerodynamics)Quantum teleportationQuantumElectronExcitonSemiconductorQuantum networkCondensed matter physics

MeSH Terms

CadmiumElectronsElementary ParticlesMagneticsManganeseOptics and PhotonicsSemiconductorsSpectrum AnalysisRamanTellurium

Affiliated Institutions

Related Publications

Publication Info

Year
2003
Type
article
Volume
2
Issue
3
Pages
175-179
Citations
40
Access
Closed

External Links

Download PDF (Free) View on DOI.org arXiv PubMed Semantic Scholar

Social Impact

Altmetric
PlumX Metrics

Social media, news, blog, policy document mentions

Citation Metrics

40
OpenAlex
0
Influential

Cite This

Jiming Bao, Andrea V. Bragas, J. K. Furdyna et al. (2003). Optically induced multispin entanglement in a semiconductor quantum well. Nature Materials , 2 (3) , 175-179. https://doi.org/10.1038/nmat839

Identifiers

DOI
10.1038/nmat839
PMID
12612675
arXiv
quant-ph/0206191

Data Quality

Data completeness: 88%