



@article {2689,
	title = {Optimal state transfer and entanglement generation in power-law interacting systems},
	year = {2020},
	month = {10/6/2020},
	abstract = {<p>We present an optimal protocol for encoding an unknown qubit state into a multiqubit Greenberger-Horne-Zeilinger-like state and, consequently, transferring quantum information in large systems exhibiting power-law (1/rα) interactions. For all power-law exponents α between d and 2d+1, where d is the dimension of the system, the protocol yields a polynomial speedup for α\&gt;2d and a superpolynomial speedup for α\&le;2d, compared to the state of the art. For all α\&gt;d, the protocol saturates the Lieb-Robinson bounds (up to subpolynomial corrections), thereby establishing the optimality of the protocol and the tightness of the bounds in this regime. The protocol has a wide range of applications, including in quantum sensing, quantum computing, and preparation of topologically ordered states.\&nbsp;</p>},
	url = {https://arxiv.org/abs/2010.02930},
	author = {Minh C. Tran and Abhinav Deshpande and Andrew Y. Guo and Andrew Lucas and Alexey V. Gorshkov}
}
