v0.0.6

PastaQ v0.0.6

Diff since v0.0.5

v0.0.5

PastaQ v0.0.5

Diff since v0.0.4

Closed issues:

• Variational quantum eigensolver (#21)
• Inner between MPO/MPO and MPO/MPS with more than 2 site indices (#180)
• Choi matrix for depolarizing channel fails (#186)
• Add trivialstate and trivialprocess (#188)
• Add arbitrary noise configurations (#189)
• Add bitflip and phaseflip noise models (#190)

Merged pull requests:

• Trivial states and bit/phase flip noise (#191) (@GTorlai)
• productstate/productoperator functions to replace trivialstate/trivialprocess (#193) (@mtfishman)

v0.0.4

PastaQ v0.0.4

Diff since v0.0.3

Closed issues:

• Add project functions for MPS,MPO,LPDO,Choi (#86)
• Make README.md point to docs/src/index.md (#125)
• Add observer for runcircuit (#131)
• Determine number of sites automatically in runcircuit/getsamples (#142)
• Add norm(::LPDO) (#149)
• Remove references to choi keyword argument in docstrings (#155)
• Missing normalization in validation loss estimation for tomography (#159)
• Add a printing flag to tomography (#160)
• Add multi-threading to getsamples functions (#163)
• Make a random number generator for "randU" (#168)
• add layer structure for quantum circuit (#171)
• Add custom printing functionality in tomography functions (#173)
• implement array function for LPDO Choi matrices (#176)
• tr(L::LPDO, "Output"/"Input") (#178)
• Add choitags function (#181)
• Add nlayers and ngates for gate lists (#184)

Merged pull requests:

• minor fixes + fixed norm bug in xvalidation (#166) (@GTorlai)
• added functions without specification of N (#169) (@GTorlai)
• Observer for layered circuits (#172) (@GTorlai)

v0.0.3

PastaQ v0.0.3

Closed issues:

• ApplyGate! definition (#2)
• applygate! failing incremental compilation (#6)
• Advanced optimizers (#15)
• Custom preparation/measurements (#16)
• Long-range gates (#17)
• Multi-threading for the tomography loops (#18)
• Optimize LPDO tomography (#20)
• State tomography at finite temperature (#22)
• Output time of each epoch to quantum state tomography (#24)
• Finish optimizing MPS tomography (#25)
• Make apply gate function for MPOs (#26)
• Quantumgate definition and measurement projectors (#27)
• Add measurement dictionary (#28)
• Change QST to use eigenstates of measurement rotations (#29)
• Remove gate contraction in granll loop using projection into eigenstates (#32)
• Work with a normalized state as default by removing locnorms (#33)
• Optimize LPDO (#35)
• Data generation for MPO density matrices (#38)
• Exactly zero gradients for some of the tensor components (#40)
• Make all operators complex (and allow users to control the element type) (#41)
• Quantum algorithms (#43)
• Version 0.0.1 (#50)
• Introduce appendlayer! function (#55)
• Add MPO sampling (#56)
• Implement "randU" gate type (#59)
• Add LPDO type (#64)
• Automatic generation of measurements/preparation gates (#66)
• Convert process tomography to work with un-split Choi states (#68)
• Readout error (#73)
• Change tomography localnorm keyword argument to use_localnorm (#74)
• Define inner(::LPDO, ::MPO) and related functions (#75)
• Create a distances.jl file for all distance-related functions (#77)
• Fix internal optimizer operations for complex-valued tensors (#81)
• Use unsplit version of Choi matrix in the circuits methods (#82)
• Update Choi matrix interface (#83)
• Replace initializetomography with more specific names (#87)
• Reexport ITensors (#88)
• Rename generatedata to sample or samples? (#90)
• Add trace-preserving constraints in process tomography (#91)
• Replace fullfidelity(::MPO, ::MPO) with fidelity(::ITensor, ::ITensor) (#94)
• Remove extraneous functions from export list (#95)
• Possible mistake in randomcircuit for 2D random circuit (#96)
• Savedata and loaddata for LPDO and Choi types (#97)
• More verbose noise keyword options (#98)
• Don't reexport ITensors (#99)
• Change syntax for how noise parameters are passed to runcircuit (#100)
• Change compilecircuit to buildcircuit (#101)
• getsamples readout_errors keyword argument is confusing (#102)
• Maybe change input ordering of tomography function (#103)
• Change input and output ordering of savedata and loaddata (#104)
• Reset optimizers when calling tomography (#106)
• Quantum circuit to generate Ising thermal state (#110)
• Quantum Fourier Transform (#111)
• Pass tomography observer as a keyword argument (#112)
• Add quantum tomography examples to the readme (#115)
• Example to add custom gates (#116)
• Change resetoptimizer! to Base.empty! (#118)
• documentation link is broken (#121)
• Make readsamples and writesampleswithout saving/loading a model (#122)
• Change output of getsamples to "Z=>0" / output Z basis by default (#126)
• Remove measX gates (#127)
• Remove prepX gates (#128)
• Add cross-validation and model selection in tomography (#134)
• Change inputstates to local_input_states in getsamples (#135)
• Shrink default batchsize to match data (#138)
• Possible bug in linear algebra functions for LPDO with 4-site tensors (#141)
• Remove Choi type (?) (#147)
• Multiple calls of normalize! keep modifying the tensors (#151)
• Change field TP_distance to trace_preserving_distance in TomographyObserver (#154)

Merged pull requests:

• Add test/runtests.jl file (#1) (@mtfishman)
• Use Dict to store gate definitions (#3) (@mtfishman)
• Add testing CI (#4) (@mtfishman)
• Added application of two-qubit gates (#5) (@GTorlai)
• Run circuit (#7) (@GTorlai)
• QST for real/positive MPS (#9) (@GTorlai)
• Qst with local normalization (#10) (@GTorlai)
• Restructure (#11) (@GTorlai)
• quantum state tomography with MPS (#13) (@GTorlai)
• LPDO quantum state tomography (#14) (@GTorlai)
• Optimize qst (#19) (@mtfishman)
• Make some gate definitions more efficient (#23) (@mtfishman)
• Add more in-place operations (#30) (@mtfishman)
• Redefinition of quantumgates + measurement projections (#31) (@GTorlai)
• Removed gate contraction, use projections into eigenstates instead (#34) (@GTorlai)
• quantum gates on MPO (#37) (@GTorlai)
• Added swaps for long-range gates (#39) (@GTorlai)
• Gate definitions (#42) (@mtfishman)
• Optimize LPDO (#44) (@GTorlai)
• Multithread quantum state tomography (#45) (@mtfishman)
• Move ITensorsGateEvolution module into PastaQ (#46) (@mtfishman)
• Use apply function in runcircuit (#47) (@mtfishman)
• Simplify ITensorsGateEvolution (#48) (@mtfishman)
• Remove ITensorsGateEvolution (#49) (@mtfishman)
• Noisy circuit interface (#51) (@GTorlai)
• Minor fixes (#52) (@GTorlai)
• Rename noise, makekraus and makegate to gate (#53) (@mtfishman)
• Circuitinterface (#54) (@GTorlai)
• New implementations of fullmatrix and fullvector (#57) (@mtfishman)
• Choi matrix (#58) (@GTorlai)
• Add randU gate type (#61) (@mtfishman)
• Add appendlayer! function (#62) (@mtfishman)
• Process tomography + data generation interface (#63) (@GTorlai)
• New optimizers, observer, fidelity(MPO,MPO), multi-threading LPDO (#65) (@GTorlai)
• Add LPDO type (#67) (@mtfishman)
• Examples (#69) (@GTorlai)
• Change over more functions to use LPDO (#70) (@mtfishman)
• Start documentation website (#71) (@mtfishman)
• fidelity-bound (#72) (@GTorlai)
• lognormalize! -> normalize! (#76) (@mtfishman)
• Readout (#78) (@GTorlai)
• Clean up distances.jl functions (#89) (@mtfishman)
• Random states, split-tomography wrapper, generatedata with unsplit Choi (#92) (@GTorlai)
• Use randU gate in randomcircuit (#93) (@mtfishman)
• Remove return_state from getsamples (#105) (@mtfishman)
• Observer, save/load for Choi/LPDO (#107) (@GTorlai)
• New noise keyword argument syntax (#108) (@mtfishman)
• Tomography interface (#109) (@mtfishman)
• Fix to README (#113) (@emstoudenmire)
• Change process tomography samples data format (#114) (@mtfishman)
• Add QFT example (#117) (@mtfishman)
• New tomography observer interface (#119) (@mtfishman)
• Add copy methods for optimizer types and use in tomography (#123) (@mtfishman)
• Example 3: finite-temperature states (#124) (@GTorlai)
• Change in the data format (#129) (@GTorlai)
• Remove prep/meas gate types (#136) (@mtfishman)
• Tomography algorithm using un-split processes (#140) (@GTorlai)
• Fix running averages of complex parameters in optimizers (#144) (@GTorlai)
• Fix normalize!(::MPO) and tr(::MPO) (#146) (@mtfishman)
• TP regularization and cross-validation (#152) (@GTorlai)
• Replace fullfidelity with fidelity(::ITensor, ::ITensor) (#156) (@mtfishman)
• more docs + split_dataset (#157) (@GTorlai)
• Make README.md a symbolic link to docs/src/index.md (#158) (@mtfishman)
• Allow longer gate names by using Symbol instead of SmallString (#161) (@mtfishman)