org.jscience.physics.quantum
Class Operator

java.lang.Object
  org.jscience.physics.quantum.Operator

All Implemented Interfaces:

java.io.Serializable, Member

Direct Known Subclasses:

DensityMatrix, Projector, SpinOperator

public class Operator
extends java.lang.Object
implements Member

The Operator class provides an object for encapsulating quantum mechanical operators.

See Also:

Serialized Form

Field Summary

protected AbstractComplexSquareMatrix

representation DOCUMENT ME!

Constructor Summary

Operator(AbstractComplexSquareMatrix rep)
Constructs an operator given a matrix representation.

Method Summary

Operator	add(Operator op) Returns the addition of this operator and another.
boolean	equals(java.lang.Object a) Compares two operators for equality.
int	getDimension() Returns the dimension.
AbstractComplexSquareMatrix	getRepresentation() Returns the representation.
int	hashCode() Returns a hashcode for this operator.
boolean	isSelfAdjoint() Returns true if this operator is self-adjoint.
boolean	isUnitary() Returns true if this operator is unitary.
KetVector	multiply(KetVector ket) Returns the multiplication of this operator and a ket vector.
Operator	multiply(Operator op) Returns the multiplication of this operator and another.
double	norm() Returns the operator norm.
Operator	subtract(Operator op) Returns the subtraction of this operator and another.
java.lang.String	toString() Returns a string representing this operator.
Complex	trace() Returns the trace.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

representation

protected AbstractComplexSquareMatrix representation

DOCUMENT ME!

Constructor Detail

Operator

public Operator(AbstractComplexSquareMatrix rep)

Constructs an operator given a matrix representation.

Parameters:

rep - a matrix representation

Method Detail

equals

public boolean equals(java.lang.Object a)

Compares two operators for equality.

Overrides:

equals in class java.lang.Object

Parameters:

a - an operator

Returns:

DOCUMENT ME!

toString

public java.lang.String toString()

Returns a string representing this operator.

Overrides:

toString in class java.lang.Object

Returns:

DOCUMENT ME!

hashCode

public int hashCode()

Returns a hashcode for this operator.

Overrides:

hashCode in class java.lang.Object

Returns:

DOCUMENT ME!

getRepresentation

public AbstractComplexSquareMatrix getRepresentation()

Returns the representation.

Returns:

DOCUMENT ME!

isSelfAdjoint

public boolean isSelfAdjoint()

Returns true if this operator is self-adjoint.

Returns:

DOCUMENT ME!

isUnitary

public boolean isUnitary()

Returns true if this operator is unitary.

Returns:

DOCUMENT ME!

trace

public Complex trace()

Returns the trace.

Returns:

DOCUMENT ME!

norm

public double norm()

Returns the operator norm.

Returns:

DOCUMENT ME!

getDimension

public int getDimension()

Returns the dimension.

Returns:

DOCUMENT ME!

add

public Operator add(Operator op)

Returns the addition of this operator and another.

Parameters:

op - an operator

Returns:

DOCUMENT ME!

subtract

public Operator subtract(Operator op)

Returns the subtraction of this operator and another.

Parameters:

op - an operator

Returns:

DOCUMENT ME!

multiply

public Operator multiply(Operator op)

Returns the multiplication of this operator and another.

Parameters:

op - an operator

Returns:

DOCUMENT ME!

multiply

public KetVector multiply(KetVector ket)

Returns the multiplication of this operator and a ket vector.

Parameters:

ket - a ket vector

Returns:

DOCUMENT ME!

Throws:

IllegalDimensionException - If the operator and vector have different dimensions.