qml.io.bloq_registers¶
- bloq_registers(bloq)[source]¶
Reads a Qualtran Bloq signature and returns a dictionary mapping the Bloq’s register names to
Wires.Note
This function requires the latest version of Qualtran. We recommend installing the main branch via
pip:pip install qualtranThe keys of the returned dictionary are the register names in the Qualtran Bloq. The values are
Wiresobjects with a length equal to the bitsize of its respective register. The wires are indexed in ascending order, starting from 0.This function makes it easy to access the wires that a Bloq acts on and use them to precisely control how gates connect.
- Parameters
bloq (Bloq) – an initialized Qualtran
Bloqto be wrapped as a PennyLane operator- Returns
- A dictionary mapping the names of the Bloq’s registers to
Wires objects with the same lengths as the bitsizes of their respective registers.
- A dictionary mapping the names of the Bloq’s registers to
- Return type
dict
- Raises
TypeError – bloq must be an instance of
Bloq.
Example
This example shows how to find the estimation wires of a textbook Quantum Phase Estimation Bloq.
>>> from qualtran.bloqs.phase_estimation import RectangularWindowState, TextbookQPE >>> from qualtran.bloqs.basic_gates import ZPowGate >>> textbook_qpe_small = TextbookQPE(ZPowGate(exponent=2 * 0.234), RectangularWindowState(3)) >>> qml.bloq_registers(textbook_qpe_small) {'q': Wires([0]), 'qpe_reg': Wires([1, 2, 3])}