Testing Bell's Inequality with Ballistic Electrons in Semiconductors

Abstract

We propose an experiment to test Bell's inequality violation in condensed-matter physics. We show how to generate, manipulate and detect entangled states using ballistic electrons in Coulomb-coupled semiconductor quantum wires. Due to its simplicity (only five gates are required to prepare entangled states and to test Bell's inequality), the proposed semiconductor-based scheme can be implemented with currently available technology. Moreover, its basic ingredients may play a role towards large-scale quantum-information processing in solid-state devices.

4 pages, RevTeX4, 4 figures, uses epsf, latexsym, times; Bell's inequality generalized to Bell-CHSH inequality; small notation change to conform to PRA style; to be published in PRA as a Rapid Communication

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• The Physical Implementation of Quantum Computation
• Quantum computation using electrons trapped by surface acoustic waves
• Quantum entanglement and information processing via excitons in optically-driven quantum dots

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• Impurity Scattering Induced Entanglement of Ballistic Electrons
• Entanglement of Two Impurities through Electron Scattering
• Macroscopic Einstein-Podolsky-Rosen pairs in superconducting circuits
• The Rashba Effect within the Coherent Scattering Formalism
• Generating spin-entangled electron pairs in normal conductors using voltage pulses
• Single-qubit gates and measurements in the surface acoustic wave quantum computer
• Double quantum dot turnstile as an electron spin entangler
• Quantum gates with topological phases
• Surface Acoustic Wave Single-Electron Interferometry
• Theory of semiconductor quantum-wire based single- and two-qubit gates
• Analysis of Bell inequality violation in superconducting qubits
• Aharonov-Bohm interferometry with a tunnel-coupled wire
• Effects of decoherence and errors on Bell-inequality violation
• Semiconductor-based electron flying qubits: Review on recent progress accelerated by numerical modelling
• Spintronic devices as quantum networks