All-electrical coherent control of the exciton states in a single quantum dot
Author(s)
de la Giroday, A Boyer
Bennett, AJ
Pooley, MA
Stevenson, RM
Skoeld, N
Patel, RB
Farrer, I
Ritchie, DA
Shields, AJ
Griffith University Author(s)
Year published
2010
Metadata
Show full item recordAbstract
We demonstrate high-fidelity reversible transfer of quantum information from the polarization of photons into the spin state of an electron-hole pair in a semiconductor quantum dot. Moreover, spins are electrically manipulated on a subnanosecond time scale, allowing us to coherently control their evolution. By varying the area of the electrical pulse, we demonstrate phase-shift and spin-flip gate operations with near-unity fidelities. Our system constitutes a controllable quantum interface between flying and stationary qubits, an enabling technology for quantum logic in the solid state.We demonstrate high-fidelity reversible transfer of quantum information from the polarization of photons into the spin state of an electron-hole pair in a semiconductor quantum dot. Moreover, spins are electrically manipulated on a subnanosecond time scale, allowing us to coherently control their evolution. By varying the area of the electrical pulse, we demonstrate phase-shift and spin-flip gate operations with near-unity fidelities. Our system constitutes a controllable quantum interface between flying and stationary qubits, an enabling technology for quantum logic in the solid state.
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Journal Title
Physical review. B, Condensed matter and materials physics
Volume
82
Issue
24
Subject
Other physical sciences not elsewhere classified