expectation_compute#

cuquantum.bindings.cudensitymat.expectation_compute( intptr_t handle, intptr_t expectation, double time, int64_t batch_size, int32_t num_params, intptr_t params, intptr_t state, intptr_t expectation_value, intptr_t workspace, intptr_t stream, )[source]#

Computes the operator expectation value(s) with respect to the given quantum state(s).

Parameters:

handle (intptr_t) – Library handle.
expectation (intptr_t) – Expectation value object.
time (double) – Specified time.
batch_size (int64_t) – Batch size (>=1).
num_params (int32_t) – Number of variable parameters defined by the user.
params (intptr_t) – GPU-accessible pointer to an F-order 2d-array of user-defined real parameter values: params[num_params, batch_size].
state (intptr_t) – Quantum state (or a batch of quantum states).
expectation_value (intptr_t) – Pointer to the expectation value(s) vector storage in GPU-accessible RAM of the same data type as used by the state and operator.
workspace (intptr_t) – Allocated workspace descriptor.
stream (intptr_t) – CUDA stream.