tfq.math.mps_1d_expectation

Calculate the expectation value of circuits wrt some operator(s)

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Main aliases

tfq.math.simulate_mps.mps_1d_expectation

tfq.math.mps_1d_expectation(
    programs, symbol_names, symbol_values, pauli_sums, bond_dim=4
)

Simulate the final state of programs given symbol_values are placed inside of the symbols with the name in symbol_names in each circuit. From there we will then compute the expectation values of pauli_sums on the final states. Note that this op requires 1D non periodic circuits.

Args
programs	tf.Tensor of strings with shape [batch_size] containing the string representations of the circuits to be executed.
symbol_names	tf.Tensor of strings with shape [n_params], which is used to specify the order in which the values in symbol_values should be placed inside of the circuits in programs.
symbol_values	tf.Tensor of real numbers with shape [batch_size, n_params] specifying parameter values to resolve into the circuits specificed by programs, following the ordering dictated by symbol_names.
pauli_sums	tf.Tensor of strings with shape [batch_size, n_ops] containing the string representation of the operators that will be used on all of the circuits in the expectation calculations.
bond_dim	Integer value used for the bond dimension during simulation.

Returns
tf.Tensor with shape [batch_size, n_ops] that holds the expectation value for each circuit with each op applied to it (after resolving the corresponding parameters in).