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Singlet-triplet filtering and entanglement in a quantum dot structure.

Research output: Contribution to journalJournal article

Published

Journal publication date2007
JournalPhysical Review B
Journal number8
Volume75
Pages085302
Original languageEnglish

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.