Deterministic Preparation of a Tunable Few-Fermion System

Quantum crystal growing: Adiabatic preparation of a bosonic antiferromagnet in the presence of a parabolic inhomogeneity

We theoretically study the adiabatic preparation of an antiferromagnetic phase in a mixed Mott insulator of two bosonic atom species in a one-dimensional optical lattice. In such a system one can engineer a tunable parabolic inhomogeneity by controlling the difference of the trapping potentials felt by the two species. Using numerical simulations we predict that a finite parabolic potential can assist the adiabatic preparation of the antiferromagnet. The optimal strength of the parabolic inhomogeneity depends sensitively on the number imbalance between the two species. We also find that during…

Ultrafast critical ground state preparation via bang-bang protocols

The fast and faithful preparation of the ground state of quantum systems is a challenging task but crucial for several applications in the realm of quantum-based technologies. Decoherence poses a limit to the maximum time-window allowed to an experiment to faithfully achieve such desired states. This is of particular significance in critical systems, where the vanishing energy gap challenges an adiabatic ground state preparation. We show that a bang-bang protocol, consisting of a time evolution under two different values of an externally tunable parameter, allows for a high-fidelity ground sta…

光双态系统中的热力学与态制备

Thermodynamics and State Preparation in a Two-State System of Light

本研究利用光学染料微腔平台实现光子双模系统的热化，通过可调化学势展示玻色子两能级系统的热力学行为，并验证约瑟夫森振荡与量子统计占据特性，为量子态制备和量子热力学提供实验基础。

Dynamical preparation of stripe states in spin-orbit coupled gases

In spinor Bose-Einstein condensates, spin-changing collisions are a remarkable proxy to coherently realize macroscopic many-body quantum states. These processes have been, e.g., exploited to generate entanglement, to study dynamical quantum phase transitions, and proposed for realizing nematic phases in atomic condensates. In the same systems dressed by Raman beams, the coupling between spin and momentum induces a spin dependence in the scattering processes taking place in the gas. Here we show that, at weak couplings, such modulation of the collisions leads to an effective Hamiltonian which i…

利用相互作用阻塞制备微波屏蔽分子的低熵阵列

Low-entropy arrays of microwave-shielded molecules prepared by interaction blockade

通过相互作用阻塞技术，实现微波屏蔽分子在运动基态的高保真度单分子制备，为大规模极性分子阵列在量子计算和精密测量中应用奠定基础。

利用镊子阵列中的可调无序实现可编程玻璃态动力学

Programmable glassy dynamics using tunable disorder in tweezer arrays

提出统一框架，基于无序分布统计特性描述位置无序量子自旋的弛豫动力学，并借助镊子阵列的确定性控制实现可调无序，为量子模拟器中的可调弛豫动力学铺路。