A reset-if-leaked procedure for encoded spin qubits

通过工程化耗散浴实现可调超导量子比特的快速无条件复位与泄漏抑制

Fast Unconditional Reset and Leakage Reduction of a Tunable Superconducting Qubit via an Engineered Dissipative Bath

本研究利用工程化超材料波导提供宽频冷浴，实现可调transmon量子比特在88纳秒内对多个激发态的无条件复位（误差低于0.13%），并通过态密度滚降实现44纳秒内选择性复位第二激发态至0.285%残余布居，同时保持计算子空间信息保真度。

Leakage mitigation for quantum error correction using a mixed qubit scheme

Leakage errors take qubits out of the computational subspace and will accumulate if not addressed. A leaked qubit will reduce the effectiveness of quantum error correction protocols due to the cost of implementing leakage reduction circuits and the harm caused by interacting leaked states with qubit states. Ion trap qubits driven by Raman gates have a natural choice between qubits encoded in magnetically insensitive hyperfine states that can leak and qubits encoded in magnetically sensitive Zeeman states of the electron spin that cannot leak. In our previous work, we compared these two qubits …

通过具有可调量子记忆的近邻自旋链从量子储备池到量子极限学习机

From quantum reservoirs to quantum extreme learning machines through a nearest-neighbor spin chain with tunable quantum memory

本文提出近邻自旋链架构可在量子储备池计算与量子极限学习机间插值，通过贝叶斯优化调整参数，发现混沌边缘性能最优，时间处理依赖动力学机制而非连接性。

EHands：多项式计算的量子协议

EHands: Quantum Protocol for Polynomial Computation on Real-Valued Encoded States

EHands是一种用于多项式计算的量子协议，通过期望值编码方案实现高效并行计算，适用于实值编码状态的多项式变换。

A quantum computer using a trapped-ion spin molecule and microwave radiation

We propose a new design for a quantum information processor where qubits are encoded into Hyperfine states of ions held in a linear array of individually tailored microtraps and sitting in a spatially varying magnetic field. The magnetic field gradient introduces spatially dependent qubit transition frequencies and a type of spin-spin interaction between qubits. Single and multi-qubit manipulation is achieved via resonant microwave pulses as in liquid-NMR quantum computation while the qubit readout and reset is achieved through trapped-ion fluorescence shelving techniques. By adjusting the mic…

利用子空间蒙特卡洛方法模拟多个仅交换量子比特的开放系统动力学

Simulating the Open System Dynamics of Multiple Exchange-Only Qubits using Subspace Monte Carlo

本文提出一种基于蒙特卡洛的方法，用于模拟多个仅交换量子比特的开放系统动力学，通过测量每个量子比特的总自旋分量来减少退相干，从而在子空间中模拟不同轨迹。