Cooperative pulses for pseudo-pure state preparation

Journal Article · Mon Jun 16 00:00:00 EDT 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4884295· OSTI ID:22300262

Wei, Daxiu ^[1]; Chang, Yan; Yang, Xiaodong ^[2]

---

1. Physics Department and Shanghai Key Laboratory of Magnetic Resonance, East China Normal University, 200062 Shanghai (China)
2. Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, 215163 Suzhou, Jiangsu (China)

Using an extended version of the optimal-control-based gradient ascent pulse engineering algorithm, cooperative (COOP) pulses are designed for multi-scan experiments to prepare pseudo-pure states in quantum computation. COOP pulses can cancel undesired signal contributions, complementing and generalizing phase cycles. They also provide more flexibility and, in particular, eliminate the need to select specific individual target states and achieve the fidelity of theoretical limit by flexibly choosing appropriate number of scans and duration of pulses. The COOP approach is experimentally demonstrated for three-qubit and four-qubit systems.

• OSTI ID: 22300262
• Journal Information: Applied Physics Letters, Vol. 104, Issue 24; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALGORITHMS
FLEXIBILITY
OPTIMAL CONTROL
PULSES
PURE STATES
QUANTUM COMPUTERS
QUANTUM INFORMATION
QUBITS
SIGNALS