Scheme for secure swapping two unknown states of a photonic qubit and an electron-spin qubit using simultaneous quantum transmission. and teleportation via quantum dots inside single-sided optical cavities

作者：Heo Jino; Kang Min Sung; Hong Chang Ho; Choi Seong Gon; Hong Jong Phil^*

来源：Physics Letters A, 2017, 381(22): 1845-1852.

DOI：10.1016/j.physleta.2017.01.052

• Simultaneous quantum transmission and
• teleportation
• Quantum dot
• Optical cavity

We propose a scheme for swapping two unknown states of a photon and electron spin confined to a charged quantum dot (QD) between two users by transferring a single photon. This scheme simultaneously transfers and teleports an unknown state (electron spin) between two users. For this bidirectional quantum communication, we utilize the interactions between a photonic and an electron spin qubits of a QD located inside a single-sided optical cavity. Thus, our proposal using QD-cavity systems can obtain a certain success probability with high fidelity. Furthermore, compared to a previous scheme using cross-Kerr nonlinearities and homodyne detections, our scheme (using QD-cavity systems) can improve the feasibility under the decoherence effect in practice.

• 出版日期2017-6-15