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 is equivalent to the one of an artificial spinor gas with spin-changing collisions that are tunable with the Raman intensity. By exploiting this dressed-basis description, we propose a robust protocol to coherently drive the spin-orbit-coupled condensate into the ferromagnetic stripe phase via crossing a quantum phase transition of the effective low-energy model in an excited state.

中文翻译：

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自旋轨道耦合气体中条纹态的动态制备

在自旋玻色-爱因斯坦凝聚中，自旋变化的碰撞是相干实现宏观多体量子态的一个显着代表。例如，这些过程已被用于产生纠缠，研究动态量子相变，并被提议用于实现原子凝聚物中的向列相。在由拉曼光束修饰的相同系统中，自旋和动量之间的耦合导致气体中发生的散射过程中的自旋依赖性。在这里，我们表明，在弱耦合下，碰撞的这种调制会导致有效的哈密顿量，它等效于具有可随拉曼强度调节的自旋变化碰撞的人造自旋气体之一。通过利用这种基于穿着的描述，