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Title: One-step preparation of cluster states in quantum-dot molecules

Abstract

Cluster states, a special type of highly entangled states, are a universal resource for measurement-based quantum computation. Here, we propose an efficient one-step generation scheme for cluster states in semiconductor quantum dot molecules, where qubits are encoded on singlet and triplet states of two coupled quantum dots. By applying a collective electrical field or simultaneously adjusting interdot bias voltages of all double-dot molecules, we get a switchable Ising-like interaction between any two adjacent quantum molecule qubits. The initialization, the single-qubit measurement, and the experimental parameters are discussed. It is shown that preparation of large cluster states and one-way quantum computation are implementable in semiconductor quantum dots with the present techniques.

Authors:
; ; ;  [1]
  1. Key Laboratory of Quantum Information, University of Science and Technology of China, Chinese Academy of Sciences, Hefei 230026 (China)
Publication Date:
OSTI Identifier:
20982433
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. A; Journal Volume: 75; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevA.75.050301; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ELECTRIC FIELDS; ELECTRIC POTENTIAL; INTERACTIONS; ISING MODEL; MOLECULES; QUANTUM COMPUTERS; QUANTUM DOTS; QUANTUM ENTANGLEMENT; QUBITS; SEMICONDUCTOR MATERIALS; TRIPLETS

Citation Formats

Guo, Guo-Ping, Zhang, Hui, Tu, Tao, and Guo, Guang-Can. One-step preparation of cluster states in quantum-dot molecules. United States: N. p., 2007. Web. doi:10.1103/PHYSREVA.75.050301.
Guo, Guo-Ping, Zhang, Hui, Tu, Tao, & Guo, Guang-Can. One-step preparation of cluster states in quantum-dot molecules. United States. doi:10.1103/PHYSREVA.75.050301.
Guo, Guo-Ping, Zhang, Hui, Tu, Tao, and Guo, Guang-Can. Tue . "One-step preparation of cluster states in quantum-dot molecules". United States. doi:10.1103/PHYSREVA.75.050301.
@article{osti_20982433,
title = {One-step preparation of cluster states in quantum-dot molecules},
author = {Guo, Guo-Ping and Zhang, Hui and Tu, Tao and Guo, Guang-Can},
abstractNote = {Cluster states, a special type of highly entangled states, are a universal resource for measurement-based quantum computation. Here, we propose an efficient one-step generation scheme for cluster states in semiconductor quantum dot molecules, where qubits are encoded on singlet and triplet states of two coupled quantum dots. By applying a collective electrical field or simultaneously adjusting interdot bias voltages of all double-dot molecules, we get a switchable Ising-like interaction between any two adjacent quantum molecule qubits. The initialization, the single-qubit measurement, and the experimental parameters are discussed. It is shown that preparation of large cluster states and one-way quantum computation are implementable in semiconductor quantum dots with the present techniques.},
doi = {10.1103/PHYSREVA.75.050301},
journal = {Physical Review. A},
number = 5,
volume = 75,
place = {United States},
year = {Tue May 15 00:00:00 EDT 2007},
month = {Tue May 15 00:00:00 EDT 2007}
}