Singlet-triplet filtering and entanglement in a quantum dot structure

Abstract

We consider two interacting electrons in a semiconductor quantum dot structure which consists of a small dot within a larger dot, and demonstrate a singlet-triplet filtering mechanism which involves spin-dependent resonances and can generate entanglement. By studying the exact time evolution of singlet and triplet states we show how the degree of both filtering and spin entanglement can be tuned using a time-dependent gate voltage.

6 pages, 7 figures

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Cited by in corpus (4)

• Long-range entanglement for spin qubits via quantum Hall edge modes
• Magnetoresistance and transistor-like behavior of double quantum dots connected to ferromagnetic and superconductor leads
• Two-electron resonances in quasi-one dimensional quantum dots with Gaussian confinement
• Quantum Gates Between Two Spins in a Triple Dot System with an Empty Dot