多腔体系中超导比特量子态制备与操纵研究

Quantum information processing is based on preparation and manipulation of various quantum states. The physical system, composed of superconducting microwave cavities and superconducting qubits, opens a new way for large scale solid-state quantum information processing and has been considered as one of the most promising candidates for quantum computing. In this project, we plan to do research on preparation and coherent manipulation of quantum states of superconducting qubits distributed in multiple different cavities. Specifically, we will focus on: (1) propose effective schemes for preparing various important quantum entangled states of multiple superconducting qubits located in multiple different cavities; (2) propose effective schemes for implementing quantum logic gates with superconducting qubits in multiple different cavities, by means of decoherence-free subspace or dynamics decoupling; (3) propose effective schemes for quantum state transfer among superconducting qubits in multiple different cavities; (4) propose effective schemes for quantum state transfer between superconducting qubits and microscopic systems. This research project is important in the physical implementation of large scale solid-state quantum computing.

各种量子态的制备与操纵是实现量子信息处理的基础。由超导微波腔和超导比特组成的系统为大规模固态量子计算的物理实现提供了一条新的途径，被认为是最有希望实现量子计算的物理系统之一。本项目拟开展对分布于多个不同腔内的超导比特进行量子态制备与相干操纵方面的研究。研究重点包括：（1）提出制备位于多个不同腔内超导比特各种重要量子纠缠态的可行方案；（2）提出利用无消相干子空间或动力学解耦实现位于多个不同腔内超导比特量子逻辑门的可行方案；（3）提出实现量子态在位于多个不同腔内超导比特之间传输的可行方案；（4）提出量子态在超导比特与微观系统之间传输的有效方案。本项目的研究在大规模固态量子计算的物理实现方面具有重要的意义。

各种量子态的制备与操纵是实现量子信息处理的基础。由超导微波腔和超导比特组成的系统为大规模固态量子计算的物理实现提供了一条新的途径，被认为是最有希望实现量子计算的物理系统之一。本项目开展了对分布于多个不同腔内的超导比特和微波光子进行量子态制备与相干操纵方面的研究。提出了制备位于多个不同腔内超导比特各种重要量子纠缠态、实现位于多个不同腔内超导比特量子逻辑门、量子态在位于多个不同腔内超导比特之间的传输、以及量子态从超导比特到微观物理系统传输的有效简单方案。另外，也提出了制备位于不同腔内的微波光子重要量子纠缠态的可行方案。本项目的研究在大规模固态量子计算的物理实现方面具有重要的意义。