DMQMC data for N = 14, unpolarised UEG.
Taken from Ref. [1].
For Theta <= 1 I used the initiator approximation and 1045 plane waves.
For Theta >= 1 I did not use the initiator approximation and used M = 2969 plane waves along with importance sampling. For Theta = 8 a HF basis set correction was applied of 0.2695(6) Ha per electron. See Ref. [1] for more details on the basis set correction procedure. 

Calculations were run with 1x10^6 walkers, with dt = 0.000125 in units of the (inverse) Fermi temperature.
The second (commented out) point at Theta = 1 with the larger error bars is from initiator free calculations.

Example output are available in dmqmc_beta_4 for the Theta = 0.25 data point. The results were analysed with finite_temp_analysis.py distributed with hande. 

References
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[1] "Quantum Monte Carlo Simulations of Warm Dense Matter", Fionn D. Malone, PhD Thesis, Imperial College London (2017).