Experimental study of matter-wave four-wave mixing in <math xmlns="http://www.w3.org/1998/Math/MathML"><mmultiscripts><mi mathvariant="normal">K</mi><mprescripts></mprescripts><none></none><mn>39</mn></mmultiscripts></math> Bose-Einstein condensates with tunable interaction

Yue Zhang; Liangchao Chen; Zekui Wang; Yazhou Wang; Pengjun Wang; Lianghui Huang; Zengming Meng; Zhuxiong Ye; Wei Han; Jing Zhang

doi:10.1103/btrx-c77h

Experimental study of matter-wave four-wave mixing in ${}^{39}K$ Bose-Einstein condensates with tunable interaction

Yue Zhang ¹, Liangchao Chen ^1,2,*, Zekui Wang¹, Yazhou Wang¹, Pengjun Wang ^1,2, Lianghui Huang ^1,2, Zengming Meng ^1,2, Zhuxiong Ye ¹, Wei Han^1,2 et al.

Jing Zhang ^1,2,†

¹State Key Laboratory of Quantum Optics Technologies and Devices, Institute of Opto-electronics, Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi 030006, China
²Hefei National Laboratory, Hefei, Anhui 230088, China

^*Contact author: chenlchao87@sxu.edu.cn
^†Contact author: jzhang74@sxu.edu.cn

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Phys. Rev. A 113, 013326 – Published 21 January, 2026

DOI: https://doi.org/10.1103/btrx-c77h

Abstract

We experimentally investigate four-wave mixing (FWM) of matter waves in two geometric configurations in ${}^{39}K$ Bose-Einstein condensates with the atomic interaction tuned via Feshbach resonances. For one configuration with the single-spin component, the FWM yield increases with a larger scattering length. For the two-spin component configuration, we specifically investigate FWM in both the droplet and gas parameter regimes. We find that the FWM yield reaches its maximum near the critical parameter region between the gas and droplet phases. Our research can help to optimize the FWM yield for matter-wave amplification and entangled atom pair generation, making it conducive to applications in quantum information processing and precision measurement.

Physical Review A

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Experimental study of matter-wave four-wave mixing in ${}^{39}K$ Bose-Einstein condensates with tunable interaction

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Experimental study of matter-wave four-wave mixing in K39 Bose-Einstein condensates with tunable interaction

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Experimental study of matter-wave four-wave mixing in ${}^{39}K$ Bose-Einstein condensates with tunable interaction