ExtensiveMoments¶
-
class
ExtensiveMoments
: public feasst::Analyze¶ Accumulate extensive moments for derivatives from fluctuations. This is currently implemented for a grand canonical ensemble:
\(N_i^j N_k^m U^p\)
where \(i,k\) are particle types, and the powers \(j,m,p\) are collected from 0 to a maximum order cutoff.
Public Functions
-
ExtensiveMoments
(const argtype &args = argtype())¶ args:
max_order: maximum order cutoff for the powers (default: 3).
-
std::string
header
(const Criteria &criteria, const System &system, const TrialFactory &trials) const¶ Return the header for writing.
-
void
initialize
(Criteria *criteria, System *system, TrialFactory *trial_factory)¶ Initialize and precompute before trials.
-
void
update
(const Criteria &criteria, const System &system, const TrialFactory &trial_factory)¶ Perform update action.
-
std::string
write
(const Criteria &criteria, const System &system, const TrialFactory &trial_factory)¶ Write the moments by serialization of a 5d accumulator. If checkpoints do not work, this file can be read using feasst_deserialize
-
const Accumulator &
moments
(const int p, const int m, const int k, const int j, const int i) const¶ Return the extensive moments.
-