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Experimental implementation of quantum information processing by Zeeman-perturbed nuclear quadrupole resonance

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Abstract

Nuclear magnetic resonance (NMR) has been widely used in the context of quantum information processing (QIP). However, despite the great similarities between NMR and nuclear quadrupole resonance (NQR), no experimental implementation for QIP using NQR has been reported. We describe the implementation of basic quantum gates and their applications on the creation and manipulation of pseudopure states using linearly polarized radiofrequency pulses under static magnetic field perturbation. The NQR quantum operations were implemented using a single-crystal sample of \(\hbox {KClO}_{3}\) and observing \(^{35}\hbox {Cl}\) nuclei, which possess spin 3/2 and give rise to a two-qubit system. The results are very promising and indicate that NQR can be successfully used for performing fundamental experiments in QIP. One advantage of NQR in comparison with NMR is that the main interaction is internal to the sample, which makes the system more compact, lowering its cost and making it easier to be miniaturized to solid-state devices. Furthermore, as an example, the study of squeezed spin states could receive relevant contributions from NQR.

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Acknowledgments

This work was supported by Brazilian agencies FAPESP (2012/02208-5) and CNPq (483109/2011-8), and by the Brazilian National Institute of Science and Technology for Quantum Information (INCT-IQ). The authors also acknowledge Aparecido Donizeti Fernandes de Amorim and Elderson Cássio Domenicucci by the technical support.

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Authors and Affiliations

  1. Departamento de Ciências da Natureza, Matemática e Educação, Universidade Federal de São Carlos, Caixa Postal 153, Araras, SP, 13600-970, Brasil

    João Teles

  2. Instituto de Física de São Carlos, Universidade de São Paulo, CP 369, São Carlos, SP, 13560-970, Brasil

    Christian Rivera-Ascona, Roberson S. Polli, Rodrigo Oliveira-Silva, Edson L. G. Vidoto, José P. Andreeta & Tito J. Bonagamba

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  1. João Teles
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Correspondence to João Teles.

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Teles, J., Rivera-Ascona, C., Polli, R.S. et al. Experimental implementation of quantum information processing by Zeeman-perturbed nuclear quadrupole resonance. Quantum Inf Process 14, 1889–1906 (2015). https://doi.org/10.1007/s11128-015-0967-3

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