Volume 71, Number 4, August 2005
|Page(s)||524 - 529|
|Published online||13 July 2005|
Implementing controlled-NOT gate based on free spin qubits with semiconductor quantum-dot array
Department of Physics, Changshu Institute of Technology - Changshu 215500, PRC
2 Center for Quantum Information Science, National Cheng Kung University Tainan 70101, Taiwan
Corresponding author: email@example.com
Accepted: 17 June 2005
Based on electron spins in semiconductor quantum dots as qubits, a new quantum controlled-NOT (CNOT) gate is constructed in solid nanostructure without resorting to spin-spin interactions. Single-electron tunneling technology and coherent quantum-dot cellular-automaton architecture are used to generate an ancillary charge entangled state. Using the ancillary charge entangled state as an intermediate state, we obtain a spin entangled state and design a CNOT gate by using only single-spin rotations.
PACS: 03.67.Lx – Quantum computation / 73.63.-b – Electronic transport in nanoscale materials and structures
© EDP Sciences, 2005
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