q2ns-analysis.cc File Reference

Defines q2ns::analysis. More...

#include "ns3/q2ns-analysis.h"
#include "ns3/q2ns-qstate-all.h"
#include "ns3/q2ns-types.h"
#include <Eigen/Dense>
#include <cmath>
#include <complex>
#include <stdexcept>

Include dependency graph for q2ns-analysis.cc:

Go to the source code of this file.

Namespaces
namespace	q2ns
namespace	q2ns::analysis
namespace	q2ns::analysis::anonymous_namespace{q2ns-analysis.cc}

Functions
qpp::cmat	q2ns::analysis::anonymous_namespace{q2ns-analysis.cc}::ToDensityMatrix (const QState &s)
	Convert a supported QState backend to a density matrix.
double	q2ns::analysis::anonymous_namespace{q2ns-analysis.cc}::ClampToInterval (double x, double lo, double hi, double tol=1e-10)
	Clamp a scalar metric to a closed interval within numerical tolerance.
Eigen::MatrixXcd	q2ns::analysis::anonymous_namespace{q2ns-analysis.cc}::HermitianSqrtPSD (const Eigen::MatrixXcd &A, double negEigTol=1e-12)
	Compute the Hermitian square root of a positive semidefinite matrix.
double	q2ns::analysis::anonymous_namespace{q2ns-analysis.cc}::UhlmannFidelity (const Eigen::MatrixXcd &rho, const Eigen::MatrixXcd &sigma, double negEigTol=1e-12)
	Compute Uhlmann fidelity between two density matrices.
double	q2ns::analysis::anonymous_namespace{q2ns-analysis.cc}::HermitianTraceNorm (const Eigen::MatrixXcd &A)
	Compute the trace norm of a Hermitian matrix.
double	q2ns::analysis::Fidelity (const QState &a, const QState &b)
	Compute fidelity between two QState objects of the same backend type.
double	q2ns::analysis::Purity (const QState &s)
	Compute the purity of a quantum state.
bool	q2ns::analysis::IsPure (const QState &s, double tol=1e-12)
	Check whether a quantum state is pure within a numerical tolerance.
double	q2ns::analysis::VonNeumannEntropy (const QState &s)
	Compute the von Neumann entropy of a quantum state in bits.
double	q2ns::analysis::TraceDistance (const QState &a, const QState &b)
	Compute the trace distance between two QState objects of the same backend type.

Detailed Description

Defines q2ns::analysis.

Definition in file q2ns-analysis.cc.