Minor updates

- Removing version number from M files
- Bugfix in MaximumOutputFidelity

AbsPPTConstraints.m

@@ -32,7 +32,6 @@
 %   requires: IsPSD.m, opt_args.m, perm_inv.m
 %   author: Nathaniel Johnston ([email protected])
 %   package: QETLAB
-%   version: 0.60
 %   last updated: November 14, 2014
 
 function L = AbsPPTConstraints(lam,dim,varargin)

AntisymmetricProjection.m

@@ -30,7 +30,6 @@
 %             PermuteSystems.m, sporth.m
 %   author: Nathaniel Johnston ([email protected])
 %   package: QETLAB
-%   version: 0.50
 %   last updated: November 26, 2012
 
 function PA = AntisymmetricProjection(dim,varargin)

ApplyMap.m

@@ -16,7 +16,6 @@
 %   requires: opt_args.m, PermuteSystems.m, Swap.m
 %   author: Nathaniel Johnston ([email protected])
 %   package: QETLAB
-%   version: 0.50
 %   last updated: November 12, 2014
 
 function PhiX = ApplyMap(X,Phi)

Bell.m

@@ -23,7 +23,6 @@
 %   requires: iden.m, opt_args.m
 %   author: Nathaniel Johnston ([email protected])
 %   package: QETLAB
-%   version: 0.50
 %   last updated: September 23, 2014
 
 function phi = Bell(varargin)

BrauerStates.m

@@ -19,7 +19,6 @@
 %
 %   author: Nathaniel Johnston ([email protected])
 %   package: QETLAB
-%   version: 0.51
 %   last updated: November 12, 2014
 
 function B = BrauerStates(d,p)

CBNorm.m

@@ -28,7 +28,6 @@
 %   author: Nathaniel Johnston ([email protected]), based on an
 %           algorithm by John Watrous
 %   package: QETLAB
-%   version: 0.60
 %   last updated: November 21, 2014
 
 function cb = CBNorm(Phi,varargin)

ChannelDistinguishability.m

@@ -28,23 +28,15 @@
 %
 %   author: Nathaniel Johnston ([email protected])
 %   package: QETLAB
-%   version: 0.50
-%   last updated: October 10, 2014
+%   last updated: November 27, 2014
 
 function dist = ChannelDistinguishability(Phi,Psi,varargin)
 
-% guess the input and output dimensions, in case they aren't provided
-if(iscell(Phi))
-    dim = [size(Phi{1,1},2), size(Phi{1,1},1)];
-elseif(iscell(Psi))
-    dim = [size(Psi{1,1},2), size(Psi{1,1},1)];
-else
-    dim = round(sqrt(length(Phi)));
-    dim = [dim,dim];
-end
+% Get the input and output dimensions of PHI and PSI.
+[da,db] = superoperator_dims(Psi,0,varargin{2:end});
 
 % set optional argument defaults: p = [1/2,1/2], dim guessed based on input
-[p,dim] = opt_args({ [1,1]/2, dim },varargin{:});
+[p,dim] = opt_args({ [1,1]/2, [da,db] },varargin{:});
 
 % We convert to a Choi matrix to make things easier -- we end up converting
 % back to Kraus operators in the DiamondNorm function, but the performance

ChessboardState.m

@@ -27,7 +27,6 @@
 %
 %   author: Nathaniel Johnston ([email protected])
 %   package: QETLAB
-%   version: 0.50
 %   last updated: March 13, 2013
 
 function rho = ChessboardState(a,b,c,d,m,n,varargin)

ChoiMap.m

@@ -20,7 +20,6 @@
 %   requires: iden.m, MaxEntangled.m, opt_args.m
 %   author: Nathaniel Johnston ([email protected])
 %   package: QETLAB
-%   version: 0.50
 %   last updated: August 5, 2013
 
 function C = ChoiMap(varargin)

ChoiMatrix.m

@@ -24,7 +24,6 @@
 %
 %   author: Nathaniel Johnston ([email protected])
 %   package: QETLAB
-%   version: 0.60
 %   last updated: November 24, 2014
 
 function C = ChoiMatrix(Phi,varargin)

Commutant.m

@@ -14,7 +14,6 @@
 %
 %   author: Nathaniel Johnston ([email protected])
 %   package: QETLAB
-%   version: 0.50
 %   last updated: November 12, 2014
 
 function C = Commutant(A)

ComplementaryMap.m

@@ -27,7 +27,6 @@
 %
 %   author: Nathaniel Johnston ([email protected])
 %   package: QETLAB
-%   version: 0.60
 %   last updated: November 24, 2014
 
 function PhiC = ComplementaryMap(Phi,varargin)

DepolarizingChannel.m

@@ -16,7 +16,6 @@
 
 %   requires: iden.m, MaxEntangled.m, opt_args.m
 %   author: Nathaniel Johnston ([email protected])
-%   version: 1.00
 %   last updated: March 4, 2014
 
 function delta = DepolarizingChannel(dim,varargin)

DiamondNorm.m

@@ -27,7 +27,6 @@
 %   author: Nathaniel Johnston ([email protected]), based on an
 %           algorithm by John Watrous
 %   package: QETLAB
-%   version: 0.60
 %   last updated: November 21, 2014
 
 function dn = DiamondNorm(Phi,varargin)

Distinguishability.m

@@ -24,7 +24,6 @@
 %
 %   author: Nathaniel Johnston ([email protected])
 %   package: QETLAB
-%   version: 0.50
 %   last updated: October 6, 2014
 
 function [dist,meas] = Distinguishability(X,varargin)

DualMap.m

@@ -29,7 +29,6 @@
 %
 %   author: Nathaniel Johnston ([email protected])
 %   package: QETLAB
-%   version: 0.60
 %   last updated: November 24, 2014
 
 function PhiD = DualMap(Phi,varargin)

Entropy.m

@@ -1,21 +1,23 @@
-%%  ENTROPY    Computes the von Neumann entropy of a density matrix
+%%  ENTROPY    Computes the von Neumann or Renyi entropy of a density matrix
 %   This function has one required argument:
 %     RHO: a density matrix
 %
 %   ENT = Entropy(RHO) is the (base 2) von Neumann entropy of RHO.
 %
-%   This function has one optional input argument:
+%   This function has two optional input arguments:
 %     BASE (default 2)
+%     ALPHA (default 1)
 %
-%   ENT = Entropy(RHO,BASE) is the von Neumann entropy of RHO, computed
-%   with logarithms in the base specified by BASE.
+%   ENT = Entropy(RHO,BASE,ALPHA) is the entropy of RHO, computed with
+%   logarithms in the base specified by BASE. If ALPHA = 1 then this is the
+%   von Neumann entropy. If ALPHA <> 1 then this is the Renyi-ALPHA
+%   entropy.
 %
 %   URL: http://www.qetlab.com/Entropy
 
 %   requires: nothing
 %   author: Nathaniel Johnston ([email protected])
-%   version: 0.60
-%   last updated: November 25, 2014
+%   last updated: November 27, 2014
 
 function ent = Entropy(rho,varargin)
 

Fidelity.m

@@ -14,7 +14,6 @@
 %   authors: Vincent Russo ([email protected])
 %            Nathaniel Johnston ([email protected])
 %   package: QETLAB
-%   version: 0.60
 %   last updated: November 21, 2014
 
 function fid = Fidelity(rho,sigma)

FilterNormalForm.m

@@ -41,7 +41,6 @@
 %             
 %   author: Nathaniel Johnston ([email protected])
 %   package: QETLAB
-%   version: 0.50
 %   last updated: October 3, 2014
 
 function [xi,GA,GB,FA,FB] = FilterNormalForm(rho,varargin)

FourierMatrix.m

@@ -10,7 +10,6 @@
 %   requires: nothing
 %   author: Nathaniel Johnston ([email protected])
 %   package: QETLAB
-%   version: 0.50
 %   last updated: November 30, 2012
 
 function F = FourierMatrix(dim)

GellMann.m

@@ -18,7 +18,6 @@
 %   requires: opt_args.m
 %   author: Nathaniel Johnston ([email protected])
 %   package: QETLAB
-%   version: 0.50
 %   last updated: December 18, 2013
 
 function g = GellMann(ind,varargin)

GenGellMann.m

@@ -21,7 +21,6 @@
 %   requires: opt_args.m
 %   author: Nathaniel Johnston ([email protected])
 %   package: QETLAB
-%   version: 0.50
 %   last updated: December 18, 2013
 
 function g = GenGellMann(ind1,ind2,dim,varargin)

GenPauli.m

@@ -22,7 +22,6 @@
 %   requires: opt_args.m
 %   author: Nathaniel Johnston ([email protected])
 %   package: QETLAB
-%   version: 0.50
 %   last updated: December 18, 2013
 
 function p = GenPauli(ind1,ind2,dim,varargin)

InSeparableBall.m

@@ -18,7 +18,6 @@
 %   requires: nothing
 %   author: Nathaniel Johnston ([email protected])
 %   package: QETLAB
-%   version: 0.60
 %   last updated: November 14, 2014
 
 function isb = InSeparableBall(X)

IsAbsPPT.m

@@ -25,9 +25,9 @@
 
 %   requires: AbsPPTConstraints.m, InSeparableBall.m, IsPSD.m, opt_args.m,
 %             perm_inv.m
+%
 %   author: Nathaniel Johnston ([email protected])
 %   package: QETLAB
-%   version: 0.60
 %   last updated: November 14, 2014
 
 function iappt = IsAbsPPT(rho,varargin)

IsBlockPositive.m

@@ -43,7 +43,6 @@
 %
 %   author: Nathaniel Johnston ([email protected])
 %   package: QETLAB
-%   version: 0.50
 %   last updated: September 23, 2014
 
 function [ibp,wit] = IsBlockPositive(X,varargin)

IsCP.m

@@ -16,9 +16,9 @@
 %   requires: ApplyMap.m, ChoiMatrix.m, iden.m, IsHermPreserving.m,
 %             IsPSD.m, MaxEntangled.m, opt_args.m, PermuteSystems.m,
 %             sporth.m, superoperator_dims.m
+%
 %   author: Nathaniel Johnston ([email protected])
 %   package: QETLAB
-%   version: 0.50
 %   last updated: January 4, 2013
 
 function cp = IsCP(Phi,varargin)

IsEntanglingGate.m

@@ -25,9 +25,9 @@
 
 %   requires: opt_args.m, IsProductOperator.m, IsProductVector.m,
 %             perm_inv.m, PermuteSystems.m, SchmidtDecomposition.m
+%
 %   author: Nathaniel Johnston ([email protected])
 %   package: QETLAB
-%   version: 0.50
 %   last updated: November 28, 2012
 
 function [eg,wit] = IsEntanglingGate(U,varargin)

IsHermPreserving.m

@@ -17,7 +17,6 @@
 %             PermuteSystems.m, sporth.m, superoperator_dims.m
 %   author: Nathaniel Johnston ([email protected])
 %   package: QETLAB
-%   version: 0.50
 %   last updated: January 4, 2013
 
 function hp = IsHermPreserving(Phi,varargin)

IsPPT.m

@@ -25,7 +25,6 @@
 %   requires: IsPSD.m, opt_args.m, PartialTranspose.m, PermuteSystems.m
 %   author: Nathaniel Johnston ([email protected])
 %   package: QETLAB
-%   version: 0.50
 %   last updated: November 20, 2012
 
 function [ppt,wit] = IsPPT(X,varargin)

IsPSD.m

@@ -19,7 +19,6 @@
 %   requires: opt_args.m
 %   author: Nathaniel Johnston ([email protected])
 %   package: QETLAB
-%   version: 0.50
 %   last updated: September 21, 2014
 
 function [psd,wit] = IsPSD(X,varargin)

IsProductOperator.m

@@ -22,7 +22,6 @@
 %
 %   author: Nathaniel Johnston ([email protected])
 %   package: QETLAB
-%   version: 0.50
 %   last updated: November 12, 2014
 
 function [ipo,dec] = IsProductOperator(X,varargin)

IsProductVector.m

@@ -20,7 +20,6 @@
 %   requires: opt_args.m, SchmidtDecomposition.m
 %   author: Nathaniel Johnston ([email protected])
 %   package: QETLAB
-%   version: 0.50
 %   last updated: November 26, 2012
 
 function [ipv,dec] = IsProductVector(vec,varargin)

IsSeparable.m

@@ -42,7 +42,6 @@
 %             
 %   author: Nathaniel Johnston ([email protected])
 %   package: QETLAB
-%   version: 0.50
 %   last updated: November 14, 2014
 
 function sep = IsSeparable(X,varargin)

IsTotallyNonsingular.m

@@ -21,7 +21,6 @@
 %   requires: opt_args.m, sporth.m
 %   author: Nathaniel Johnston ([email protected])
 %   package: QETLAB
-%   version: 0.50
 %   last updated: December 13, 2012
 
 function [itn,wit] = IsTotallyNonsingular(X,varargin)

IsTotallyPositive.m

@@ -22,7 +22,6 @@
 %   requires: opt_args.m
 %   author: Nathaniel Johnston ([email protected])
 %   package: QETLAB
-%   version: 0.50
 %   last updated: December 13, 2012
 
 function [itp,wit] = IsTotallyPositive(X,varargin)

IsUPB.m

@@ -18,7 +18,6 @@
 
 %   requires: opt_args.m, vec_partitions.m
 %   author: Nathaniel Johnston ([email protected])
-%   version: 0.50
 %   last updated: October 21, 2014
 
 function [iu,wit] = IsUPB(varargin)

IsotropicState.m

@@ -14,7 +14,6 @@
 %   requires: iden.m, MaxEntangled.m, opt_args.m
 %   author: Nathaniel Johnston ([email protected])
 %   package: QETLAB
-%   version: 0.50
 %   last updated: September 22, 2014
 
 function rho = IsotropicState(dim,alpha)

KrausOperators.m

@@ -33,7 +33,6 @@
 %
 %   author: Nathaniel Johnston ([email protected])
 %   package: QETLAB
-%   version: 0.60
 %   last updated: November 24, 2014
 
 function ko = KrausOperators(Phi,varargin)

KyFanNorm.m

@@ -10,7 +10,6 @@
 %   requires: kpNorm.m
 %   author: Nathaniel Johnston ([email protected])
 %   package: QETLAB
-%   version: 0.50
 %   last updated: December 1, 2012
 
 function nrm = KyFanNorm(X,k)

Majorizes.m

@@ -14,7 +14,6 @@
 %   requires: nothing
 %   author: Nathaniel Johnston ([email protected])
 %   package: QETLAB
-%   version: 0.50
 %   last updated: March 4, 2014
 
 function m = Majorizes(a,b)

MaxEntangled.m

@@ -21,7 +21,6 @@
 %   requires: iden.m, opt_args.m
 %   author: Nathaniel Johnston ([email protected])
 %   package: QETLAB
-%   version: 0.50
 %   last updated: November 28, 2012
 
 function psi = MaxEntangled(dim,varargin)

MaximumOutputFidelity.m

@@ -25,7 +25,6 @@
 %
 %   authors: Nathaniel Johnston ([email protected])
 %   package: QETLAB
-%   version: 0.60
 %   last updated: November 24, 2014
 
 function mof = MaximumOutputFidelity(Phi,Psi,varargin)