Abstract
Teleportation of unitary operations can be viewed as a quantum remote control. The remote realization of robust multiqubit logic gates among distant long-lived qubit registers is a key challenge for quantum computation and quantum information processing. Here we propose a simple and deterministic scheme for teleportation of a Toffoli gate among three spatially separated electron spin qubits in optical microcavities by using local linear optical operations, an auxiliary electron spin, two circularly-polarized entangled photon pairs, photon measurements, and classical communication. We assess the feasibility of the scheme and show that the scheme can be achieved with high average fidelity under the current technology. The scheme opens promising perspectives for constructing long-distance quantum communication and quantum computation networks with solid-state qubits.
Highlights
= 3, 3 and = 3, − 3 represent heavy hole states with spin 3/2 and − 3/2 components and the superscript arrow indicate their propagation direction along the z axis
Many physical systems have been studied in order to realize quantum computation, such as cavity quantum electrodynamics (QED) systems[21,22,23,24,25], ion trap systems[26,27], nuclear magnetic resonance (NMR) systems[28], linear optics systems[29], superconducting circuit systems[30,31], and so on
In this paper, inspired by the above works, we propose an efficient scheme to teleport a Toffoli gate among three distant electron spins with quantum dots in optical microcavities, resorting to local linear optical operations, an auxiliary electron spin, and two circularly-polarized entangled photon pairs
Summary
Hu and Rarity[33] proposed efficient loss-resistant schemes for heralded state teleportation and entanglement swapping using a single quantum-dot spin in an optical microcavity based on giant circular birefringence. Based on such quantum-dot-microcavity coupled system, some other attractive schemes have been proposed to realize quantum computation and quantum information processing[34,35,36,37,38,39,40]. In this paper, inspired by the above works, we propose an efficient scheme to teleport a Toffoli gate among three distant electron spins with quantum dots in optical microcavities, resorting to local linear optical operations, an auxiliary electron spin, and two circularly-polarized entangled photon pairs. The proposed scheme may open promising possibilities for distributed quantum computation, long-distance quantum communication, and the construction of remote quantum-information-processing networks
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
