Scheme for Bidirectional Quantum Teleportation of Unknown Electron-Spin States of Quantum Dots within Single-Sided Cavit
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Scheme for Bidirectional Quantum Teleportation of Unknown Electron-Spin States of Quantum Dots within Single-Sided Cavities Jino Heo 1 & Changho Hong 2 & Min-Sung Kang 3 & Hyung-Jin Yang 4 Received: 12 March 2020 / Accepted: 3 October 2020/ # Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract
We represent the mutual swapping of two unknown states using bidirectional quantum teleportation (BQT) while transferring a single photon. In our BQT scheme, two users (Alice and Bob) can mutually teleport their two unknown states of the electron-spin in quantum dots (QDs) embedded in single-sided cavities. For this BQT scheme, we employ the interactions of a photonic spin (photon) and an electron-spin (excess electron) of QDs confined in a singlesided cavity, which is feasible in practice. The previous BQT scheme which used cross-Kerr nonlinearities (XKNLs) and X-homodyne detection was inevitable the decoherence effect in optical fibers. Consequently, the proposed BQT scheme can enhance an experimental implementation with the use of QD-cavity systems under the decoherence effect and this can also be realized with current technology, compared with the previous BQT scheme based on XKNLs. Keywords Bidirectional quantum teleportation . Quantum dot . Single-sided cavity
1 Introduction For the implementation of quantum information processing schemes, such as quantum communication [1–8], quantum operational gates [9–13], quantum computation [14–17], and quantum entanglements [18–22]. Quantum optics is specially considered to be critical in particular, with regard to cross-Kerr nonlinearity (XKNL) and quantum dots (QDs).
* Hyung-Jin Yang [email protected]
1
Institute of Natural Science, Korea University, Sejong 30019, Republic of Korea
2
The Affiliated Institute of Electronics and Telecommunications Research Institute, P.O. Box 1, Yuseong, Daejeon 34188, Republic of Korea
3
Korean Intellectual Property Office (KIPO), Government Complex Daejeon Building 4, 189, Cheongsa-ro, Seo-gu, Daejeon 35208, Republic of Korea
4
Department of Physics, Korea University, Sejong 30019, Republic of Korea
International Journal of Theoretical Physics
Photon interactions, which can be directly used for the realization of photonic multi-qubit gates, can be induced from the XKNL effect in Kerr medium. Also for the applications, the enhancements and the progress of the theory and experiment about the XKNL have been accomplished by many researchers [23–33]. For XKNL-based quantum information processing schemes, many studies have demonstrated according to the measurement strategies as homodyne [4, 5, 9, 18, 34–36] and photon number measurements [15, 17, 37, 38], and also the design as quantum bus beams [13, 15, 39]. However, in practice, the output state (photon-coherent beam system) of an optical multi-qubit gate will transform to a mixed state by the decoherence effect (photon loss and dephasing) when utilizing homodyne measurement on coherent state (probe beam) [13, 17, 34, 37, 38]. The decoherence effect (photon los
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