JSci.physics.quantum

Class QuantumMath

java.lang.Object

JSci.maths.AbstractMath

JSci.physics.quantum.QuantumMath

public final class QuantumMath
extends AbstractMath

The Quantum math library. This class cannot be subclassed or instantiated because all methods are static.

Version:

1.5

Author:

Mark Hale

Method Summary

Methods

Modifier and Type	Method and Description
static Operator	anticommutator(Operator A, Operator B) Returns the anticommutator {A,B}.
static Operator	commutator(Operator A, Operator B) Returns the commutator [A,B].
static Complex	expectation(DensityMatrix dm, Operator op) Returns the expectation value.
static Complex	expectation(Operator op, KetVector ket) Returns the expectation value.
static Complex	probability(DensityMatrix dm, Projector p) Returns the probability.
static Complex	probability(Projector p, KetVector ket) Returns the probability.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

commutator

public static Operator commutator(Operator A,
                  Operator B)

Returns the commutator [A,B].

Parameters:

A - an operator

B - an operator

anticommutator

public static Operator anticommutator(Operator A,
                      Operator B)

Returns the anticommutator {A,B}.

Parameters:

A - an operator

B - an operator

expectation

public static Complex expectation(Operator op,
                  KetVector ket)

Returns the expectation value.

Parameters:

op - an operator

ket - a ket vector

Throws:

DimensionException - If the operator and vector have different dimensions.

expectation

public static Complex expectation(DensityMatrix dm,
                  Operator op)

Returns the expectation value.

Parameters:

dm - a density matrix

op - an operator

Throws:

MatrixDimensionException - If the operator and matrix have different dimensions.

probability

public static Complex probability(Projector p,
                  KetVector ket)

Returns the probability.

Parameters:

p - a projector

ket - a ket vector

Throws:

DimensionException - If the projector and vector have different dimensions.

probability

public static Complex probability(DensityMatrix dm,
                  Projector p)

Returns the probability.

Parameters:

dm - a density matrix

p - a projector

Throws:

MatrixDimensionException - If the projector and matrix have different dimensions.