ExactReciprocal¶
- class ExactReciprocal(num_state_qubits, scaling, neg_vals=False, name='1/x')[source]¶
Bases:
qiskit.circuit.quantumcircuit.QuantumCircuit
Exact reciprocal
\[|x\rangle |0\rangle \mapsto \cos(1/x)|x\rangle|0\rangle + \sin(1/x)|x\rangle |1\rangle\]- Parameters
num_state_qubits (
int
) – The number of qubits representing the value to invert.scaling (
float
) – Scaling factor \(s\) of the reciprocal function, i.e. to compute \(s / x\).neg_vals (
bool
) – Whether \(x\) might represent negative values. In this case the first qubit is the sign, with \(|1\rangle\) for negative and \(|0\rangle\) for positive. For the negative case it is assumed that the remaining string represents \(1 - x\). This is because \(e^{-2 \pi i x} = e^{2 \pi i (1 - x)}\) for \(x \in [0,1)\).name (
str
) – The name of the object.
Note
It is assumed that the binary string \(x\) represents a number < 1.
Attributes
- ancillas¶
Returns a list of ancilla bits in the order that the registers were added.
- Return type
List
[AncillaQubit
]
- calibrations¶
Return calibration dictionary.
- The custom pulse definition of a given gate is of the form
{‘gate_name’: {(qubits, params): schedule}}
- Return type
dict
- clbits¶
Returns a list of classical bits in the order that the registers were added.
- Return type
List
[Clbit
]
- data¶
Return the circuit data (instructions and context).
- Returns
a list-like object containing the
CircuitInstruction
s for each instruction.- Return type
QuantumCircuitData
- extension_lib = 'include "qelib1.inc";'¶
- global_phase¶
Return the global phase of the circuit in radians.
- Return type
Union
[ParameterExpression
,float
]
- header = 'OPENQASM 2.0;'¶
- instances = 87¶
- metadata¶
The user provided metadata associated with the circuit
The metadata for the circuit is a user provided
dict
of metadata for the circuit. It will not be used to influence the execution or operation of the circuit, but it is expected to be passed between all transforms of the circuit (ie transpilation) and that providers will associate any circuit metadata with the results it returns from execution of that circuit.- Return type
dict
- num_ancillas¶
Return the number of ancilla qubits.
- Return type
int
- num_clbits¶
Return number of classical bits.
- Return type
int
- num_parameters¶
Convenience function to get the number of parameter objects in the circuit.
- Return type
int
- num_qubits¶
Return number of qubits.
- Return type
int
- op_start_times¶
Return a list of operation start times.
This attribute is enabled once one of scheduling analysis passes runs on the quantum circuit.
- Return type
List
[int
]- Returns
List of integers representing instruction start times. The index corresponds to the index of instruction in
QuantumCircuit.data
.- Raises
AttributeError – When circuit is not scheduled.
- parameters¶
Convenience function to get the parameters defined in the parameter table.
- Return type
ParameterView
- prefix = 'circuit'¶