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One-step method for preparing the experimental pure state in nuclear magnetic resonance

Jingwei Wen, XiaoCong Qiu, Xiangyu Kong +3 more

Science China Physics Mechanics and AstronomyNov 25, 201910 citations

Preparation of pseudo-pure states for NMR quantum computing with one ancillary qubit

Tao Xin, Liang Hao, Shi‐Yao Hou +2 more

Science China Physics Mechanics and AstronomyMar 29, 201915 citations

Linear Preparation Method of Pseudo-Pure States while Correcting Errors and Enhancing Signals for NMR Quantum Computer

Minaru Kawamura, H. Sakai, Yoshinori Manmoto +1 more

AIP conference proceedingsJan 1, 20090 citations

Preparation of pseudo-pure states by line-selective pulses in Nuclear Magnetic Resonance

Xinhua Peng, Xiwen Zhu, Ximing Fang +4 more

A new method of preparing the pseudo-pure state of a spin system for quantum computation in liquid nuclear magnetic resonance (NMR) was put forward and demonstrated experimentally. Applying appropriately connected line-selective pulses simultaneously and a field gradient pulse techniques we acquired straightforwardly all pseudo-pure states for two qubits in a single experiment much efficiently. The signal intensity with the pseudo-pure state prepared in this way is the same as that of temporal averaging. Our method is suitable for the system with arbitrary numbers of qubits. As an example of application, a highly structured search algorithm—-Hogg’s algorithm was also performed on the pseudo-pure state | 00 〉 prepared by our method.A new method of preparing the pseudo-pure state of a spin system for quantum computation in liquid nuclear magnetic resonance (NMR) was put forward and demonstrated experimentally. Applying appropriately connected line-selective pulses simultaneously and a field gradient pulse techniques we acquired straightforwardly all pseudo-pure states for two qubits in a single experiment much efficiently. The signal intensity with the pseudo-pure state prepared in this way is the same as that of temporal averaging. Our method is suitable for the system with arbitrary numbers of qubits. As an example of application, a highly structured search algorithm—-Hogg’s algorithm was also performed on the pseudo-pure state | 00 〉 prepared by our method.

Jan 1, 200038 citations

“Spectral implementation” for creating a labeled pseudo-pure state and the Bernstein–Vazirani algorithm in a four-qubit nuclear magnetic resonance quantum processor

Xinhua Peng, Xiwen Zhu, Ximing Fang +3 more

A quantum circuit is introduced to describe the preparation of a labeled pseudo-pure state by multiplet-component excitation scheme which has been experimentally implemented on a 4-qubit nuclear magnetic resonance quantum processor. Meanwhile, we theoretically analyze and numerically investigate the low-power selective single-pulse implementation of a controlled-rotation gate, which manifests its validity in our experiment. Based on the labeled pseudo-pure state prepared, a 3-qubit Bernstein-Vazirani algorithm has been experimentally demonstrated by spectral implementation. The "answers" of the computations are identified from the split peak positions in the spectra of the observer spin, which are equivalent to projective measurements required by the algorithms.A quantum circuit is introduced to describe the preparation of a labeled pseudo-pure state by multiplet-component excitation scheme which has been experimentally implemented on a 4-qubit nuclear magnetic resonance quantum processor. Meanwhile, we theoretically analyze and numerically investigate the low-power selective single-pulse implementation of a controlled-rotation gate, which manifests its validity in our experiment. Based on the labeled pseudo-pure state prepared, a 3-qubit Bernstein-Vazirani algorithm has been experimentally demonstrated by spectral implementation. The "answers" of the computations are identified from the split peak positions in the spectra of the observer spin, which are equivalent to projective measurements required by the algorithms.

arXiv:quant-ph/0202008The Journal of Chemical PhysicsFeb 18, 200412 citations

Experimental implementation of remote state preparation by nuclear magnetic resonance

Xinhua Peng, Xiwen Zhu, Ximing Fang +3 more

arXiv:quant-ph/0202004Physics Letters AJan 1, 2003201 citations

Preparation of pseudo-pure states by line-selective pulses in nuclear magnetic resonance

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Preparation of pseudo-pure states by line-selective pulses in nuclear magnetic resonance

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