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arXiv · 1507.05750

A chiral route to spontaneous entanglement generation

Carlos Gonzalez-Ballestero·Alejandro Gonzalez-Tudela·Francisco J. Garcia-vidal·Esteban Moreno
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Abstract

We study the generation of spontaneous entanglement between two qubits chirally coupled to a waveguide. The maximum achievable concurrence is demonstrated to increase by a factor of $4/e \sim 1.5$ as compared to the non-chiral coupling situation. The proposed entanglement scheme is shown to be robust against variation of the qubit properties such as detuning and separation, which are critical in the non-chiral case. This result relaxes the restrictive requirements of the non-chiral situation, paving the way towards a realistic implementation. Our results demonstrate the potential of chiral waveguides for quantum entanglement protocols.

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Carlos Gonzalez-Ballestero, Alejandro Gonzalez-Tudela, Francisco J. Garcia-vidal, Esteban Moreno. 2015-07-21. A chiral route to spontaneous entanglement generation. https://doi.org/10.1103/physrevb.92.155304

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