squander::density::LocalDepolarizingOp Class Reference

Local single-qubit depolarizing channel on one target qubit. More...

#include <noise_operation.h>

Inheritance diagram for squander::density::LocalDepolarizingOp:

Public Member Functions
void	apply_to_density (const double *params, int param_count, DensityMatrix &rho) override
	Apply this operation to the density matrix. More...
std::unique_ptr< IDensityOperation >	clone () const override
	Create a deep copy of this operation. More...
double	get_error_rate () const
std::string	get_name () const override
	Get operation name for debugging/display. More...
int	get_parameter_num () const override
	Get number of free parameters this operation requires. More...
int	get_target_qbit () const
bool	is_parametric () const
bool	is_unitary () const override
	Check if this is a unitary operation (gate) or non-unitary (noise) More...
	LocalDepolarizingOp (int target_qbit, double error_rate)
	LocalDepolarizingOp (int target_qbit)

Private Member Functions
void	apply_local_depolarizing (DensityMatrix &rho, double error_rate)

Private Attributes
double	fixed_error_rate_
bool	is_parametric_
int	target_qbit_

Detailed Description

Local single-qubit depolarizing channel on one target qubit.

Matches the Qiskit single-qubit depolarizing parameterization: ρ -> (1 - p) ρ + p * I/2 on the target subsystem.

Definition at line 107 of file noise_operation.h.

Constructor & Destructor Documentation

LocalDepolarizingOp() [1/2]

squander::density::LocalDepolarizingOp::LocalDepolarizingOp	(	int	target_qbit,
		double	error_rate
	)

Definition at line 113 of file noise_operation.cpp.

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LocalDepolarizingOp() [2/2]

squander::density::LocalDepolarizingOp::LocalDepolarizingOp ( int  target_qbit )

explicit

Definition at line 126 of file noise_operation.cpp.

Member Function Documentation

apply_local_depolarizing()

void squander::density::LocalDepolarizingOp::apply_local_depolarizing ( DensityMatrix &  rho, double  error_rate  )

private

Definition at line 154 of file noise_operation.cpp.

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apply_to_density()

void squander::density::LocalDepolarizingOp::apply_to_density ( const double *  params, int  param_count, DensityMatrix &  rho  )

overridevirtual

Apply this operation to the density matrix.

Parameters

params	Pointer to this operation's parameters (may be nullptr if param_count=0)
param_count	Number of parameters for this operation
rho	The density matrix to modify in-place

Implements squander::density::IDensityOperation.

Definition at line 134 of file noise_operation.cpp.

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clone()

std::unique_ptr< IDensityOperation > squander::density::LocalDepolarizingOp::clone ( ) const

overridevirtual

Create a deep copy of this operation.

Returns

Unique pointer to the cloned operation

Implements squander::density::IDensityOperation.

Definition at line 200 of file noise_operation.cpp.

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get_error_rate()

double squander::density::LocalDepolarizingOp::get_error_rate ( ) const

inline

Definition at line 121 of file noise_operation.h.

get_name()

std::string squander::density::LocalDepolarizingOp::get_name ( ) const

inlineoverridevirtual

Get operation name for debugging/display.

Returns

Human-readable name (e.g., "H", "CNOT", "Depolarizing")

Implements squander::density::IDensityOperation.

Definition at line 116 of file noise_operation.h.

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get_parameter_num()

int squander::density::LocalDepolarizingOp::get_parameter_num ( ) const

inlineoverridevirtual

Get number of free parameters this operation requires.

Returns

Number of parameters (0 for constant gates/fixed noise)

Implements squander::density::IDensityOperation.

Definition at line 115 of file noise_operation.h.

get_target_qbit()

int squander::density::LocalDepolarizingOp::get_target_qbit ( ) const

inline

Definition at line 120 of file noise_operation.h.

is_parametric()

bool squander::density::LocalDepolarizingOp::is_parametric ( ) const

inline

Definition at line 122 of file noise_operation.h.

is_unitary()

bool squander::density::NoiseOperation::is_unitary ( ) const

inlineoverridevirtualinherited

Check if this is a unitary operation (gate) or non-unitary (noise)

Returns

true for unitary gates, false for noise channels

Implements squander::density::IDensityOperation.

Definition at line 38 of file noise_operation.h.

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Member Data Documentation

fixed_error_rate_

double squander::density::LocalDepolarizingOp::fixed_error_rate_

private

Definition at line 126 of file noise_operation.h.

is_parametric_

bool squander::density::LocalDepolarizingOp::is_parametric_

private

Definition at line 127 of file noise_operation.h.

target_qbit_

int squander::density::LocalDepolarizingOp::target_qbit_

private

Definition at line 125 of file noise_operation.h.

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The documentation for this class was generated from the following files:

• noise_operation.h
• noise_operation.cpp