paddle_quantum.qsvt.qsvt

paddle_quantum.qsvt.qsvt.block_encoding_projector(num_qubits, num_projected_qubits=None)

Generate a projector that is used for simple block encoding

Parameters:

• num_qubits (int) – number of total qubits

• num_projected_qubits (int | None) – number of projected qubits, default to be num_qubits - 1

Returns:

$|0⟩⟨0|\otimes I$

Return type:

Tensor

paddle_quantum.qsvt.qsvt.qubitization(proj, phi)

generate quantum circuit that is equivalent to $e^{i\varphi (2P-I)}$

Parameters:

• proj (Tensor) – orthogonal projector

• phi (Tensor) – angle parameter

Returns:

a quantum circuit that is equivalent to e^{i phi (2P - I)}.

Return type:

Circuit

class paddle_quantum.qsvt.qsvt.QSVT(poly_p, oracle, m=None)

Bases: object

block_encoding_matrix()

provide the matrix of a block encoding of $P(X)$

Returns:

block encoding of $P(X)$ in matrix form

Return type:

Tensor

block_encoding_circuit()

generate a block encoding of $P(X)$ by quantum circuit

Returns:

a quantum circuit of unitary that is the block encoding of $P(X)$

Return type:

Circuit

block_encoding_unitary()

generate the unitary of above circuit for verification

Returns:

a block encoding unitary of $P(X)$

Return type:

Tensor