Universal quantum computation with qudits

• Published in: Science China. Physics, mechanics & astronomy Vol. 57; no. 9; pp. 1712 - 1717
• Main Authors: Luo, MingXing, Wang, XiaoJun
• Format: Journal Article
• Language: English
• Published: Heidelberg Science China Press 01.09.2014; Springer Nature B.V
• Subjects: Algorithms; Astronomy; Circuits; Classical and Continuum Physics; Computation; Construction; Gates; Gates (circuits); it系统; Logic circuits; Mathematical models; Multilevel; Observations and Techniques; Physics; Physics and Astronomy; Quantum computing; Qubits (quantum computing); Search algorithms; 子电路模型; 搜索算法; 离子阱; 自由参数; 通用电路; 逻辑门电路; 量子计算; linear ion; qudit circuit; universal qudit gate
• ISSN: 1674-7348; 1869-1927
• DOI: 10.1007/s11433-014-5551-9

Quantum circuit model has been widely explored for various quantum applications such as Shors algorithm and Grovers searching algorithm.Most of previous algorithms are based on the qubit systems.Herein a proposal for a universal circuit is given based on the qudit system,which is larger and can store more information.In order to prove its universality for quantum applications,an explicit set of one-qudit and two-qudit gates is provided for the universal qudit computation.The one-qudit gates are general rotation for each two-dimensional subspace while the two-qudit gates are their controlled extensions.In comparison to previous quantum qudit logical gates,each primitive qudit gate is only dependent on two free parameters and may be easily implemented.In experimental implementation,multilevel ions with the linear ion trap model are used to build the qudit systems and use the coupling of neighbored levels for qudit gates.The controlled qudit gates may be realized with the interactions of internal and external coordinates of the ion.