Site-selective particle deposition in periodically driven quantum lattices

Selective population of a large-angular-momentum state in an optical lattice

We propose a method to selectively populate a large angular momentum state of ultracold atoms (each with an orbital angular momentum $l \approx 2 \hbar$) in the Mott regime of a two-dimensional optical lattice. This is done by periodically modulating the lattice amplitude and implementing an additional rectangular lattice of shorter wavelength at an angle of $π/4$. The specific pulse sequences are designed using a four-level model for each well and are implemented sequentially. The results are confirmed with numerical simulations of the full Schroedinger equation. The methods of this paper are…

选择性拓扑泵浦从Floquet规范场

Occupation-selective topological pumping from Floquet gauge fields

本文研究了在密度依赖的跃迁中，通过动态职业条件变量促进隧穿，导致职业选择性拓扑泵浦。两体束缚态获得不同于单粒子的陈数，并在单粒子泵为平凡时表现出量化传输，包括反向传播响应。

周期性驱动光学拉曼晶格中反常反向传播边缘态的制备与观测

Preparation and observation of anomalous counterpropagating edge states in a periodically driven optical Raman lattice

本研究在周期性驱动光学拉曼晶格中理论探究了反常Floquet谷霍尔相的反向传播边缘态的制备与探测，揭示了初始动量对边缘态选择性布居的独立控制作用，并验证了其对长程无序的鲁棒性，为实验探索提供了理论框架。

Quantum resonance, Anderson localisation and selective manipulations in molecular mixtures by ultrashort laser pulses

We demonstrate that the current laser technology used for field-free molecular alignment via a cascade of Raman rotational transitions allows for observing long-discussed non-linear quantum phenomena in the dynamics of the periodically kicked rotor. This includes the scaling of the absorbed energy near the conditions of quantum resonance and Anderson-like localisation in the angular momentum. Based on these findings, we suggest a novel approach to tunable selective rotational excitation and alignment in a molecular mixture, using trains of short laser pulses. We demonstrate the efficiency of t…

Site selective growth of heteroepitaxial diamond nanoislands containing single SiV centers

We demonstrate the controlled preparation of heteroepitaxial diamond nano- and microstructures on silicon wafer based iridium films as hosts for single color centers. Our approach uses electron beam lithography followed by reactive ion etching to pattern the carbon layer formed by bias enhanced nucleation on the iridium surface. In the subsequent chemical vapor deposition process, the patterned areas evolve into regular arrays of (001) oriented diamond nano-islands with diameters of <500nm and a height of approx. 60 nm. In the islands, we identify single SiV color centers with narrow zero phon…

Emergent long-range interaction and state-selective localization in a strongly driven $ XXZ $ model

The nonlinear effect of a driving force in periodically driven quantum many-body systems can be systematically investigated by analyzing the effective Floquet Hamiltonian. In particular, under an appropriate definition of the effective Hamiltonian, simple driving forces may result in non-local interactions. Here we consider a driven $ XXZ $ model to show that four-site interactions emerge owing to the driving force, which can produce state-selective localization, a phenomenon where some limited Ising-like product states become fixed points of dynamics. We first derive the effective Hamiltonian…