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Merge pull request #157 from fjosw/fix/calc_rho_large_t

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_calculate_drho for large time separations
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Fabian Joswig 2023-02-28 15:46:54 +00:00 • committed by GitHub
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4 changed files with 18 additions and 5 deletions
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pyerrors/obs.py
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@ -289,7 +289,10 @@ class Obs:
self.e_n_dtauint[e_name][0] = 0.0
def _compute_drho(i):
tmp = self.e_rho[e_name][i + 1:w_max] + np.concatenate([self.e_rho[e_name][i - 1::-1], self.e_rho[e_name][1:w_max - 2 * i]]) - 2 * self.e_rho[e_name][i] * self.e_rho[e_name][1:w_max - i]
tmp = (self.e_rho[e_name][i + 1:w_max]
+ np.concatenate([self.e_rho[e_name][i - 1:None if i - w_max // 2 < 0 else 2 * (i - w_max // 2):-1],
self.e_rho[e_name][1:max(1, w_max - 2 * i)]])
- 2 * self.e_rho[e_name][i] * self.e_rho[e_name][1:w_max - i])
self.e_drho[e_name][i] = np.sqrt(np.sum(tmp ** 2) / e_N)
if self.tau_exp[e_name] > 0:
@ -320,8 +323,8 @@ class Obs:
# Standard automatic windowing procedure
tau = self.S[e_name] / np.log((2 * self.e_n_tauint[e_name][gapsize::gapsize] + 1) / (2 * self.e_n_tauint[e_name][gapsize::gapsize] - 1))
g_w = np.exp(- np.arange(1, len(tau) + 1) / tau) - tau / np.sqrt(np.arange(1, len(tau) + 1) * e_N)
for n in range(1, w_max):
if g_w[n - 1] < 0 or n >= w_max - 1:
for n in range(1, w_max // gapsize):
if g_w[n - 1] < 0 or n >= w_max // gapsize - 1:
_compute_drho(gapsize * n)
n *= gapsize
self.e_tauint[e_name] = self.e_n_tauint[e_name][n] * (1 + (2 * n / gapsize + 1) / e_N) / (1 + 1 / e_N) # Bias correction hep-lat/0306017 eq. (49)