v0.2.0

ITensors v0.2.0

Diff since v0.1.41

Closed issues:

• Clean up multMPO (#146)
• Some new Empty ITensor constructors (#352)
• Fix random complex MPS (#377)
• Use undef in randomITensor (#399)
• Make QN ITensor constructor error in case of no blocks (#408)
• Simplify maxdim!, mindim!, etc. implementation with get (#474)
• More general state function (#503)
• Add real(::ITensor) and complex(::ITensor) (#504)
• Add alias replaceprime for mapprime (#507)
• Allow more general inputs in Sweep functions like noise! (#513)
• Use onehot as alternative syntax for setelt (#580)
• Deprecate MPO(A::MPS) constructor in favor of the notation outer(A, A) (#581)
• Make ITensor() default to emptyITensor() (#593)
• Add a deprecation for emptyITensor(Any) (#601)
• ops is too strict about the type (#602)
• ArgumentError occur when i run the 1d_ising_with_observer example code (#603)
• Deprecate Base.iterate(i::Index, state = 1) (#605)
• Do not convert element types to float (#612)
• Incorrect definition of Adagdn for Electron sites (#614)
• truncate! ruins QN conserving MPS (#619)
• Allow setting complex element of real ITensor (#629)
• Allow summing over equal indices in single Tensor (#632)
• Optimize ITensor inner constructor (#643)
• Qubit number conservation (#668)
• Issue with negating block-sparse ITensor (#671)
• unexpected error about exp function (#675)
• Add swaptags(A, "x" => "y") notation to match swapprime(A, 0 => 1) (#677)

Merged pull requests:

• Update to v0.1.41 (#600) (@emstoudenmire)
• optional argument cutoff should be named. Otherwise, the code doesn't run (#604) (@kunyuan)
• Add documentation for eigen and some other functions (#606) (@mtfishman)
• Expand ITensor docs (#607) (@emstoudenmire)
• Define some missing methods for AbstractMPS broadcasting (#609) (@kshyatt)
• Replacing hardcoded literals with constants (#610) (@saolof)
• Add docs for timing and contraction sequence optimization (#613) (@mtfishman)
• Various bug fixes (#615) (@emstoudenmire)
• Undef randomITensor (#616) (@emstoudenmire)
• ITensor Bugfixes (#617) (@emstoudenmire)
• ITensor constructors (#620) (@mtfishman)
• Add real, imag, conj for ITensors (#621) (@emstoudenmire)
• Correlator function (#622) (@emstoudenmire)
• Faster noise term (#623) (@emstoudenmire)
• Simplify implementation of Sweeps setting functions (#624) (@emstoudenmire)
• Account for the new Vector storage of IndexSet (#626) (@mtfishman)
• Remove global constant max tag length from TagSet (#628) (@mtfishman)
• Add code examples from itensor.org to Documenter (#634) (@emstoudenmire)
• Add RegisterAction (#635) (@mtfishman)
• Docs improvements and more examples (#636) (@emstoudenmire)
• More code examples and improvements (#638) (@emstoudenmire)
• Format package with JuliaFormatter (#640) (@mtfishman)
• WIP: Make ITensor(i, j, k) constructors create EmptyStorage by default (#641) (@mtfishman)
• Docs Getting Started Section (#642) (@emstoudenmire)
• Fix docs and formatting (#647) (@achuchmala)
• Add write-to-disk during DMRG with SerializedElementArrays.jl (#648) (@mtfishman)
• MPS from Tensors (#649) (@emstoudenmire)
• Move NDTensors module into ITensors module (#650) (@mtfishman)
• CompatHelper: add new compat entry for "Strided" at version "1.1" (#651) (@github-actions[bot])
• CompatHelper: add new compat entry for "TupleTools" at version "1.2" (#652) (@github-actions[bot])
• CompatHelper: add new compat entry for "Dictionaries" at version "0.3" (#653) (@github-actions[bot])
• CompatHelper: add new compat entry for "Requires" at version "1.1" (#654) (@github-actions[bot])
• Docs for expect and correlation_matrix (#657) (@emstoudenmire)
• Fix bug in MPO(::AutoMPO, ...) (#659) (@mtfishman)
• Update Documenter settings (#660) (@emstoudenmire)
• Allow constructing a Tensor from a Vector of Index (#661) (@mtfishman)
• Fix bug when computing flux where index and Block were getting mixed up (#662) (@mtfishman)
• Deprecate MPO(::MPS) in favor of outer(::MPS, ::MPS) (#663) (@mtfishman)
• State and val functions (#664) (@emstoudenmire)
• Replace IndexVal with Pair{<:Index}. Add support for string values. (#665) (@emstoudenmire)
• Fix bug in expect and correlation_matrix (#666) (@mtfishman)
• Fix negating of QN ITensor (#672) (@emstoudenmire)
• Change Qubit QN convention from +1/-1 to 0/1 (closes #668) (#676) (@mtfishman)
• Generalize indexing to with end to allow arithmetic such as A[i => end - 1, j => 2]. (#679) (@mtfishman)
• Fix bug in indexing with end for order-1 ITensor (#681) (@mtfishman)
• Fix bug when taking the exponential of a QN ITensor with missing diagonal blocks (#682) (@mtfishman)

v0.1.41

ITensors v0.1.41

Diff since v0.1.40

Closed issues:

• doc link is broken (#599)

Merged pull requests:

• Add documentation for space function for built-in site types (#590) (@mtfishman)
• Remove size type parameter from ITensor and IndexSet [WIP] (#591) (@kshyatt)
• Add Qubit sites and operators (#592) (@emstoudenmire)

v0.1.40

ITensors v0.1.40

Diff since v0.1.39

Merged pull requests:

• Remove eigen QN fix code (#587) (@emstoudenmire)
• More general polar decomposition (#588) (@mtfishman)

v0.1.39

ITensors v0.1.39

Diff since v0.1.38

Merged pull requests:

• Add Pauli X,Y,Z to S=1/2 site type (#576) (@emstoudenmire)
• DMRG Improvements (#577) (@emstoudenmire)
• Bump StaticArrays version to v1.0 (#578) (@mtfishman)
• Fix orthogonalize when there are missing MPS link indices (#579) (@mtfishman)
• Make MPO * MPO contraction more robust for MPOs with multiple site indices per tensor (#585) (@mtfishman)

v0.1.38

ITensors v0.1.38

Diff since v0.1.37

Closed issues:

• MPO-MPO multiplication for chain length N=1,2 not working (#544)
• Scalar ITensor for QN or BlockSparse Case (#564)

Merged pull requests:

• Fix bug in BlockSparse-DiagBlockSparse contraction (#567) (@mtfishman)
• Add tests for printing QN diag ITensor (#568) (@mtfishman)
• Add generic support for scalar ITensor contraction (#569) (@mtfishman)
• Fix MPOMPS, MPOMPO for system sizes 1 and 2 (#572) (@mtfishman)
• Add support for inner(::MPS, ::MPO, ::MPS) with multiple siteinds per tensor (#573) (@mtfishman)
• New MPS/MPO index manipulation interface (#575) (@mtfishman)

v0.1.37

ITensors v0.1.37

Diff since v0.1.36

Merged pull requests:

• Add tests for threaded contraction with no output blocks (#565) (@mtfishman)

v0.1.36

ITensors v0.1.36

Diff since v0.1.35

Merged pull requests:

• Threaded blocksparse (#561) (@mtfishman)
• Make dmrg set ortho center to 1 before starting (#562) (@emstoudenmire)

v0.1.35

ITensors v0.1.35

Diff since v0.1.34

Closed issues:

• Should we define iterate for TagSet? (#542)
• AutoMPO slower than expected (#555)

Merged pull requests:

• Implement iterate for TagSet (#553) (@tomohiro-soejima)
• Add check for Index arrows for map! (includes sum and difference etc) (#554) (@emstoudenmire)
• Optimize AutoMPO (#556) (@mtfishman)
• Add checks for common site indices in DMRG, dot, and inner (#557) (@mtfishman)
• Fix and Improve DMRGObserver Constructor (#558) (@emstoudenmire)
• Update HDF5 to versions 0.14, 0.15 (#559) (@emstoudenmire)

v0.1.34

ITensors v0.1.34

Diff since v0.1.33

Closed issues:

• Use Symbol instead of SmallString in OpName (#550)

Merged pull requests:

• Make OpName use Symbol instead of SmallString for longer operator names (#551) (@mtfishman)

v0.1.33

ITensors v0.1.33

Diff since v0.1.32

Merged pull requests:

• Fix bug in inner(::MPS, ::MPS) when MPS have multiple site indices (#549) (@mtfishman)