Miscellaneous

uint64_t danceq::internal::BasisU1::get_dim(uint64_t n_ = -1, uint64_t L_ = -1, uint64_t Q_ = state_class::template_struct::template_Q) const

Returns dimension of a specific sector.

Returns dimension of a system of size L_, particle number n_, and local Hilbert space dimension Q_. Default -1 sets length and particle number to the current length L and particle number n of this instance. The dimension is determined by Eq. (2):

\[D_{Q\_}(L\_,n\_) = \sum_{k=0}^{\lfloor n\_ / Q\_ \rfloor} (-1)^k\binom{L\_}{k}\binom{L\_-1+n\_-Q\_k}{L\_-1}\]

Parameters:

• L_ – System size

• n_ – Particle number

• Q_ – Local Hilbert space dimension

Returns:

Dimension of the sector

int32_t danceq::internal::BasisU1::info(void) const

Prints information about the class.

Prints information about the class such as basics parameters and current memory usage.

Returns:

error_code