JSci.physics.quantum
Class Operator

java.lang.Object
  JSci.physics.quantum.Operator

All Implemented Interfaces:

Member, java.io.Serializable

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

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.
int	dimension() Returns the dimension.
boolean	equals(java.lang.Object a) Compares two operators for equality.
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

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.

Parameters:

a - an operator

toString

public java.lang.String toString()

Returns a string representing this operator.

hashCode

public int hashCode()

Returns a hashcode for this operator.

getRepresentation

public AbstractComplexSquareMatrix getRepresentation()

Returns the representation.

isSelfAdjoint

public boolean isSelfAdjoint()

Returns true if this operator is self-adjoint.

isUnitary

public boolean isUnitary()

Returns true if this operator is unitary.

trace

public Complex trace()

Returns the trace.

norm

public double norm()

Returns the operator norm.

dimension

public int dimension()

Returns the dimension.

add

public Operator add(Operator op)

Returns the addition of this operator and another.

Parameters:

op - an operator

Throws:

MatrixDimensionException - If the operators have different dimensions.

subtract

public Operator subtract(Operator op)

Returns the subtraction of this operator and another.

Parameters:

op - an operator

Throws:

MatrixDimensionException - If the operators have different dimensions.

multiply

public Operator multiply(Operator op)

Returns the multiplication of this operator and another.

Parameters:

op - an operator

Throws:

MatrixDimensionException - If the operators have different dimensions.

multiply

public KetVector multiply(KetVector ket)

Returns the multiplication of this operator and a ket vector.

Parameters:

ket - a ket vector

Throws:

DimensionException - If the operator and vector have different dimensions.