Dynamics of entanglement between quantum dot spin-qubits
John Schliemann, Daniel Loss
TL;DR
This paper reviews the physics of quantum gate operations between quantum dot spin-qubits, analyzes the dynamics of entanglement and quantum correlations, and discusses decoherence effects due to nuclear spin environments.
Contribution
It provides a comprehensive analysis of entanglement dynamics and quantum correlations in quantum dot spin-qubits, including effects of indistinguishability and decoherence mechanisms.
Findings
Indistinguishability of electrons enhances quantum correlations beyond antisymmetrization.
Quantum entanglement dynamics are influenced by nuclear spin-induced decoherence.
Recent results on quantum correlations of indistinguishable particles are summarized.
Abstract
We briefly review the physics of gate operations between quantum dot spin-qubits and analyze the dynamics of quantum entanglement in such processes. The indistinguishable character of the electrons whose spins realize the qubits gives rise to further entanglement-like quantum correlations that go beyond simple antisymmetrization effects. We also summarize further recent results concerning this type of quantum correlations of indistinguishable particles. Finally we discuss decoherence properties of spin-qubits when coupled to surrounding nuclear spins in a semiconductor nanostructure
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Taxonomy
TopicsQuantum Computing Algorithms and Architecture · Quantum and electron transport phenomena · Quantum-Dot Cellular Automata