报告题目:Experimental Realization of Scalable and Robust Quantum Architecture with Trapped Ions
报告人:中国人民大学 张翔 副教授
报告时间:2020年4月15日 下午 14:00
报告地点:腾讯会议线上直播
报告摘要:
There are a lot of different physical systems that can be used as platforms to
implement quantum computers. However the experimental realization of a
practically useful quantum computer is still extremely challenging. Trapped ion
system is one of the most promising architectures for a scalable, universal
quantum computer mainly because of its high fidelity of fundamental operations,
long coherence of qubits, and scalability for the large quantum system. Here
several experimental improvements are made to get most out of this system,
including a general quantum circuit compiler which maps arbitrary quantum
algorithm to an optimal experimental sequence, a bottom-up system simulation
toolset to find out optimal trap parameters, a cryogenic segmented trap design
to improve trapped ions lifetime, several new addressing schemes to increase
individual controllability, all digital stabilization circuits and fully
integrated automatic control system to ensure scalability and robustness and
enable fast iterative and incremental development. Then several quantum
computation and simulation experiments demonstrated on our trapped ions system
will be introduced, including an
experimental test of quantum contextuality in a three-level system (qutrit) by
observing the violation of the Kochen-Specker (KS) inequality, an experimental
quantum chemistry computation on the electronic structure of a molecular ion
(HeH+) with the unitary coupled cluster (UCC) method, and quantum simulation of some models by
indirect mapping, such as Majorana equation, interacting quantum field modes,
and PT-symmetric non-Hermitian systems.