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Entanglement generation by communication using squeezed states
| Title: | Entanglement generation by communication using squeezed states |
| Authors: | Matsuoka, Fumiaki Browse this author | | Tomita, Akihisa Browse this author →KAKEN DB | | Okamoto, Atsushi Browse this author →KAKEN DB |
| Issue Date: | 12-Aug-2013 |
| Publisher: | American Physical Society |
| Journal Title: | Physical Review A |
| Volume: | 88 |
| Issue: | 2 |
| Start Page: | 022313 |
| Publisher DOI: | 10.1103/PhysRevA.88.022313 |
| Abstract: | In order to improve the error probability of generating entanglement by communication for quantum computation, we propose the use of squeezed light. When generating entanglement between two atoms by communication, the error probability can be reduced by increasing the distance between quantum states of probe light in phase space. The phase rotation of light depends on the atom-photon coupling strength and the light amplitude, which are limited in practice. A large error probability has been expected for coherent probe light. If we assume typical values of light amplitude and phase rotation, alpha = 100 and theta = 0.01, the error probability is estimated to be P-coh((min)) = 0.14 and P-coh((hom)) = 0.23 for minimum error discrimination and homodyne measurements. The error probability can be reduced to P-squ((min)) = 1.73 x 10(-8) and P-squ((hom)) = 4.09 x 10(-5) using squeezed coherent light, where the same values of the mean photon number and the phase rotation angle are assumed for the coherent light probe. These values satisfy the requirements for scalable quantum computation. |
| Rights: | ©2013 American Physical Society |
| Type: | article |
| URI: | http://hdl.handle.net/2115/53294 |
| Appears in Collections: | 情報科学院・情報科学研究院 (Graduate School of Information Science and Technology / Faculty of Information Science and Technology) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 富田 章久
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