Fast Coherent Splitting of Bose-Einstein Condensates

Yevhenii Kuriatnikov; Nikolaus Würkner; Karthikeyan Kumaran; Tiantian Zhang; M. Venkat Ramana; Andreas Kugi; Jörg Schmiedmayer; Andreas Deutschmann-Olek; Maximilian Prüfer

arXiv · 2507.06799

Fast Coherent Splitting of Bose-Einstein Condensates

Yevhenii Kuriatnikov·Nikolaus Würkner·Karthikeyan Kumaran·Tiantian Zhang·M. Venkat Ramana·Andreas Kugi·Jörg Schmiedmayer·Andreas Deutschmann-Olek·Maximilian Prüfer

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Abstract

Preparation of non-trivial quantum states without introducing unwanted excitations or decoherence remains a central challenge in utilizing ultracold atomic systems for quantum simulation. We employ optimal control methods to realize fast, coherent splitting of a one-dimensional Bose-Einstein condensate, achieving minimal classical excitations while preserving quantum correlations. Furthermore, we explore two-step protocols in which controlled classical motion is first induced and subsequently suppressed via tailored control sequences. Our experiments highlight the potential of optimal control for quantum state engineering and dynamical control in many-body quantum systems.

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Yevhenii Kuriatnikov, Nikolaus Würkner, Karthikeyan Kumaran, Tiantian Zhang, M. Venkat Ramana, Andreas Kugi, Jörg Schmiedmayer, Andreas Deutschmann-Olek, Maximilian Prüfer. 2025-07-09. Fast Coherent Splitting of Bose-Einstein Condensates. https://arxiv.org/abs/2507.06799

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