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Title: Quantum state transmission in a superconducting charge qubit-atom hybrid
Authors: Yu, Deshui
Valado, María Martínez
Hufnagel, Christoph
Kwek, Leong Chuan
Amico, Luigi
Dumke, Rainer
Keywords: Quantum Information
Issue Date: 2016
Source: Yu, D., Valado, M. M., Hufnagel, C., Kwek, L. C., Amico, L., & Dumke, R. (2016). Quantum state transmission in a superconducting charge qubit-atom hybrid. Scientific Reports, 6, 38356-. doi:10.1038/srep38356
Series/Report no.: Scientific Reports
Abstract: Hybrids consisting of macroscopic superconducting circuits and microscopic components, such as atoms and spins, have the potential of transmitting an arbitrary state between different quantum species, leading to the prospective of high-speed operation and long-time storage of quantum information. Here we propose a novel hybrid structure, where a neutral-atom qubit directly interfaces with a superconducting charge qubit, to implement the qubit-state transmission. The highly-excited Rydberg atom located inside the gate capacitor strongly affects the behavior of Cooper pairs in the box while the atom in the ground state hardly interferes with the superconducting device. In addition, the DC Stark shift of the atomic states significantly depends on the charge-qubit states. By means of the standard spectroscopic techniques and sweeping the gate voltage bias, we show how to transfer an arbitrary quantum state from the superconducting device to the atom and vice versa.
DOI: 10.1038/srep38356
Schools: School of Physical and Mathematical Sciences 
Organisations: MajuLab, CNRS-UNS-NUS-NTU International Joint Research Unit
Research Centres: Institute of Advanced Studies 
Rights: © 2016 The Authors (Nature Publishing Group). This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit
Fulltext Permission: open
Fulltext Availability: With Fulltext
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