准一维约束对p波共振附近三体损耗的抑制
Suppression of Three-Body Loss Near a p-Wave Resonance Due to Quasi-1D Confinement
摘要：
研究了准一维空间中$^6$ Li原子费米气体在$p$波费什巴赫共振附近的三体复合率.我们确认准一维损失率常数$K_3$遵循预测的阈值标度律，即$K_3$与共振无关，并发现与远离共振的标度律$K_3 \propto (k \, a_{1D})^6$一致[Mehta et al. Phys. Rev. A 76，022711（2007）]。此外，我们开发了一个理论的基础上Breit-Wigner分析，描述了中间场的损失功能。最后，我们测量了损耗率常数随横向约束的变化，发现$K_3 \propto V_L^{-1}$，其中$V_L$是晶格深度。重要的是，在我们可达到的横向约束和温度，我们看到一个74倍的抑制共振三体损耗率常数在准一维相比，3D。随着横向约束的进一步增强，这种抑制可能为实现稳定的$p$波超流体铺平道路。
英文摘要：
We investigate the three-body recombination rate of a Fermi gas of $^6$Li atoms confined in quasi-1D near a $p$-wave Feshbach resonance. We confirm that the quasi-1D loss rate constant $K_3$ follows the predicted threshold scaling law that $K_3$ is energy independent on resonance, and find consistency with the scaling law $K_3 \propto (k \, a_{1D})^6$ far from resonance [Mehta et al. Phys. Rev. A 76, 022711 (2007)]. Further we develop a theory based on Breit-Wigner analysis that describes the loss feature for intermediate fields. Lastly we measure how the loss rate constant scales with transverse confinement and find that $K_3 \propto V_L^{-1}$, where $V_L$ is the lattice depth. Importantly, at our attainable transverse confinements and temperatures, we see a 74-fold suppression of the on-resonant three-body loss rate constant in quasi-1D compared to 3D. With significant further enhancement of the transverse confinement, this suppression may pave the way for realizing stable $p$-wave superfluids.
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