v3.8.0

• Significantly improved computational speed of WickMonitor and WickSimulate.
• Changes: The input arguments syntax of WickMonitor and WickSimulate
• New: $WickMinorStep

v3.7.7

• Improved: WickSimulate supports quadratic projection operators as quantum jump operators through WickMeasurement.
• Improved: WickMonitor allows to specify the measurement of dressed modes.
• WickMeasurement: Matrix[WickMeasurement[...]] gives the matrix represenations of the (unnormalized) projection operators rather than the dressed fermion operators themselves.
• Bug fix: WickMonitor, WickMeasurement, RandomWickCircuitSimulate
• Bug fix: Matrix[CliffordState[...]], WickMutualInformation
• New: WickMap, WickMapOdds, WickMean
• WickSimulate: The syntax of input arguments has been changed.

v3.7.2

• Fermionic quantum computation is significantly improved using Bravyi's method
• New: YoungDegree, CliffordPureQ, QubitCount, WickJump, WickMeasurement, WickNonunitary, several others for fermionic quantum computing
• Renamed: WickGaussian --> WickNonunitary, WickOperatorFrom --> WickCoefficients
• Bug fix: Some functions concerning the multiplication of Majoranas, WickOperator, WickJump, KetChop
• You can now specify an initial state for RandomCliffordCircuit and RandomCliffordCircuitSimulate.

v3.6.2

• Improved: RandomWickCircuitSimulate, RandomWickCircuit, WickGreenFunction, WickEntanglementEntropy, WickMutualInformation, WickLogarithmicNegativity, WickState, WickUnitary, WickOperator, NambuState, NambuGaussian, NambuUnitary, NambuOperator, PfaffianHouseholder
• New: RandomWickCircuit, FermiMeasurement, WickEntropy
• Renamed: Upshot --> Aggregate

v3.6.1

• GottesmanInner is greatly enhanced and renamed GottesmanDot.
• GottesmanFlip is enhanced and supports matrices consisting of COLUMNS of Gottesman vectors.
• Improved: GottesmanMatrixQ, CliffordLogarithmicNegativity
• New: PauliDecoherence

v3.6.0

The main addition in this release is the tools for efficient simulation of Clifford quantum circuits: CliffordState, CliffordUnitary, CliffordLogarithmicNegativity, CliffordCircuit, RandomCliffordCircuit, RandomCliffordCircuitSimulate, CliffordLogarithmicNegativity, RandomCliffordUnitary, RandomCliffordState, etc.

Other changes include:

• New function: UpdateStabilizerGenerators, RandomGottesmanVector, GottesmanTimes, GottesmanVectorEmbed, GottesmanMatrixEmbed, GottesmanMap
• Renamed: WickRandomCircuit --> RandomWickCircuitSimulate
• TheRaising, TheLowering, TheHadamard, TheQuadrant, TheOctant, TheHexadecant are removed.
• Raising, Lowering, Hadamard, Quadrant, Octant, Hexadecant are just Flavor names rather than functions.
• New functions: FullGottesmanMatrix, FullGottesmanVector, ParityBoole
• Improved: CliffordFactor, FromGottesmanMatrix
• Several demonstrations have been moved to QuantumPlaybook (v3.3.12).
• Improved: WickLgarithmicNegativity

v3.5.8

• Bug fixes: NoisyWickSimulate
• Improved: WickGreenFunction
• New functions: ArrayZeroQ, WickDampingOperator

v3.5.6

• Bug fix: Pfaffian
• New functions: NambuGaussian, NambuUnitary, NambuHermitian, NambuGreen, IntegerChop.
• Renamed: WickGreensFunction -> WickGreenFunction, BdGState -> NambuState, BdGUnitary -> NambuUnitary, BdGOperator -> NambuOperator, NambuMatrix[..., "Unitary"] --> NambuUnitary, NambuMatrix[..., "Hermitian"] --> NambuHermitian, NambuMatrix[..., "Green's"] -> NambuGreen
• Pfaffian is further improved.

3.5.4

• Support for noisy fermionic quantum computation with the following new functions: NoisyWickState, NoisyWickSimulate, WickGaussian, WickElements, etc.
• Input arguments pattern has been changed in WickRandomCircuit.
• TimesDaggerLeft and TimesDaggerRight are renamed AbsSquare (AbsSquareRight) and AbsSquareLeft.
• FlavorNone and FlavorNoneQ are renamed FlavorCap and FlavorCapQ, respectively.
• New functions: Hood, ArrayShort, RandomAntisymmetric, WickMatrix, BdGState, BdGUnitary, BdGOperator.
• New functions: RandomIsometric, RandomSymmetric, RandomSymplectic, RandomUnitarySymplectic
• New functions: RandomOrthogonal, BosonBasisChange, OrderedPartitions.
• Bug fix concerning CZ: (expr) ** CZ ** Ket[...] ignored expr.
• The distributions of random vectors/matrices generated by RandomVector, RandomMatrix, RandomHermitian, RandomPositive have been changed.
• Improved: PauliForm, BlochSphere
• BosonBasisChange has been dramatically improved.
• Big performance improvement of BosonBasis and FermionBasis.
• FermionBasis and BosonBasis return an association (instead of a simple list).
• PlaybookTools updated.
• The syntax of input arguments of TraceNorm, TraceDistance, Fidelity has been slighly changed, and requires more strict forms.
• Swap is renamed SWAP back at the request of many users.

v3.5.0

The main update in this release is the tools for quantum signal processing (QSP): QSP, QSPFind, QSPConvert. These tools are in line with the previously provided Chebyshev tools: ChebyshevSeries, ChebyshevCoefficients, ChebyshevPoints and ChebyshevApproximation.

Other changes are as follows:

• New symbols: QuantumEntropy, IntegerPowerQ, ChoiceCount, SpinNumbers.
• The meaning of input argument n in ChebyshevPoints and ChebyshevSeries has been slightly changed.
• ChebyshevApproximation[func, {n, parity}, ...] is supported.
• PauliDecompose and PauliCompose are renamed PauliCoefficients and PauliSeries, respectively.
• PauliDecomposeRL and PauliseComposeRL are excised as they are implemented by PauliCoefficients and PauliSeries, respectively.
• The definition of relative Renyi entropy (aka Renyi divergence) has been changed in the quantum case.