Dissipation in a Finite Temperature Atomic Josephson Junction

The description of the files containing the data for the paper: "Dissipation in a finite-temperature atomic Josephson junction." could be found here. In this paper we numerically demonstrate and characterize the emergence of distinct dynamical regimes of a finite temperature bosonic superfluid in an elongated Josephson junction generated by a thin Gaussian barrier over the entire temperature range where a well-formed condensate can be clearly identified. <br> <br> <br> The files 'imbalance_vs_time_T0_z0_...dat' are the data for fig1 (d) and fig10(a)-(ii). They have as first column the time in arbitrary units which must be multiplied by 1/(2*pi*nu_x) in order to get the times in seconds. The third column in the number of condensate particles in the left well N_L from which we could achieve the condensate population imbalace z_BEC(t)=1-2*N_L/N_BEC. <br> The file 'cond_frac..' contains the data for fig1(c) where the first column is the temperature in nK, the second column is the condensate fraction while the third one is the temperature scaled to the critical value. <br> The files 'integrated_densityxz_T,,.dat' are binary files, the first column is the x-axis in units of harmonic oscillator length along x-axis l_x, the fourth column is the equilibrium density along x-axis in arbitrary units. These are the data for fig1(a)-(b). <br> The files 'cond_thermal_tot_number_..dat' contains the time in arbitrary units as first column (to be multiplied by 1.e-4/omega _x in order to convert it in seconds), the number of the condensate/thermal and total particles as second/third and fourth column respectively. The files 'imbalance_vs_time_Jos_...dat' contains the time in arbitrary units (which must be multiplied by 1/(2*pi*nu_x) in order to get the times in seconds), the third column in the number of condensate particles in the left well N_L from which we could achieve the condensate population imbalace z_BEC(t)=1-2*N_L/N_BEC and the fourth coulumn is the number of thermal particles on the left well. These data are for fig2 and fig5. <br> The files 'imbalance_vs_time_diss_...dat' contains data used for fig6 and fig9 and their description is the same as the files ''imbalance_vs_time_Jos_...dat'. <br> The files 'conz1_...' have as first column the x-axis in units of harmonic oscillator length along x-axis, the fourth column is the density along x-axis in arbitrary units, and the number in the file name if multiplied by 1.e-4/(omega_x) gives the time in seconds. These data are used for creating the carpet plots in fig10. <br> The files 'imbalance_vs_time_..._fig11' has the same description as the files ''imbalance_vs_time_Jos_...dat'. The files 'cond_therm..fig11' has the same description as the files 'cond_thermal_tot_number_..dat'. These data are used for fig11. <br> The files 'Nbec_Nth_Ntot_T_..dat' has the same description as the files 'cond_frac...dat' and the files 'imbalance_vs_time_T...dat' has the same description as the files 'imbalance_vs_time_Jos_..dat'. From these files, the condensate/thermal and total population imbalance is obtained at different temperature, whose fit gives the results of Fig3, Fig4, Fig7 and Fig8. <br> The files 'conz1_..fig11..dat' have the same description as the files ' conz1_...', the files 'thz_...dat' have as first column the x-axis in arbitrary units while the second column is the value of the thermal cloud density along x-axis. The files 'imbalance_vs_time_..._fixed_Ntot..dat' have the same description as the files 'imbalance_vs_time..dat'. These data are used for building fig11 and fig12. <br> <br>

本文《有限温度原子约瑟夫森结（finite-temperature atomic Josephson junction）中的耗散》的数据文件说明可在此处找到。在本文中，我们通过数值方法演示并表征了：在形态良好的凝聚体（condensate）可被清晰识别的整个温度范围内，由薄高斯势垒（thin Gaussian barrier）产生的长约瑟夫森结（elongated Josephson junction）中，有限温度玻色子超流体（bosonic superfluid）不同动力学区域的涌现。<br> <br> <br> 文件‘imbalance_vs_time_T0_z0_...dat’对应图1(d)和图10(a)-(ii)的数据。其第一列为任意单位的时间，需乘以1/(2πν_x)转换为秒；第三列为左阱中的凝聚体粒子数N_L，由此可得到凝聚体布居失衡（condensate population imbalance）z_BEC(t)=1-2*N_L/N_BEC。<br> 文件‘cond_frac..’包含图1(c)的数据，第一列为温度（单位：nK），第二列为凝聚体分数，第三列为归一化至临界值的温度。<br> 文件‘integrated_densityxz_T,,.dat’为二进制文件，第一列为x轴（单位：x方向简谐振荡长度（harmonic oscillator length along x-axis）l_x），第四列为x方向的平衡密度（任意单位），对应图1(a)-(b)的数据。<br> 文件‘cond_thermal_tot_number_..dat’的第一列为任意单位的时间（需乘以1.e-4/ω_x转换为秒），第二、三、四列分别为凝聚体、热粒子和总粒子的数量；文件‘imbalance_vs_time_Jos_...dat’的第一列为任意单位的时间（需乘以1/(2πν_x)转换为秒），第三列为左阱中的凝聚体粒子数N_L（由此可得到凝聚体布居失衡z_BEC(t)=1-2*N_L/N_BEC），第四列为左阱中的热粒子数，这些数据用于图2和图5。<br> 文件‘imbalance_vs_time_diss_...dat’对应图6和图9的数据，其说明与‘imbalance_vs_time_Jos_...dat’文件相同。<br> 文件‘conz1_...’的第一列为x轴（单位：x方向简谐振荡长度l_x），第四列为x方向的密度（任意单位）；文件名中的数字乘以1.e-4/ω_x可得到时间（单位：秒），这些数据用于生成图10中的地毯图（carpet plots）。<br> 文件‘imbalance_vs_time_..._fig11’的说明与‘imbalance_vs_time_Jos_...dat’相同；文件‘cond_therm..fig11’的说明与‘cond_thermal_tot_number_..dat’相同，这些数据用于图11。<br> 文件‘Nbec_Nth_Ntot_T_..dat’的说明与‘cond_frac...dat’相同；文件‘imbalance_vs_time_T...dat’的说明与‘imbalance_vs_time_Jos_..dat’相同。通过这些文件可得到不同温度下凝聚体、热粒子和总粒子的布居失衡，其拟合结果对应图3、图4、图7和图8。<br> 文件‘conz1_..fig11..dat’的说明与‘conz1_...’相同；文件‘thz_...dat’的第一列为任意单位的x轴，第二列为x方向热云密度；文件‘imbalance_vs_time_..._fixed_Ntot..dat’的说明与‘imbalance_vs_time..dat’相同，这些数据用于构建图11和图12。<br> <br>