qat.pbo.AbstractRegister

class qat.pbo.AbstractRegister(constant_list=None)

This class is used to define abstract register. Please use this function if the name of your gate can match with gates having different arities.

Example of use:

>>> # Creates a new abstract register
>>> register = AbstractRegister()
...
>>> # Gets the first qubit of the register
>>> sub_register_1 = register[0]
...
>>> # Gets the qubit positioned at the middle of the register
>>> sub_register_2 = register[register.len() // 2]

len()

Return the length of the AbstractRegister

Returns:

length of the register

Return type:

VAR

undirected()

Set the abstract register undirected. Please call this function if order of qubits does not matter.

Returns:

this method returns the object to allow writing compact code. For instance, in the following example, First case and Second case are equivalent:

register = AbstractRegister()

# Fist case
register.undirected()
pattern = [("SWAP", register)]

# Second case
pattern = [("SWAP", register.undirected())]

Return type:

AbstractRegister