Changelog

Version (NEXT)

• moved device management functions from hardware-simulator to backend
• enhanced gate optimizations
  • added inverse gate cancellation
  • added rotation folding
• fixed flag checks in optimization functions
• enhanced the tutorial
  • added examples for the optimization pipeline
• added :hiccup format for svg visualizations
• updated clay version

Version 0.16.0

• added device namespace in domain
  • all QPU specific information is captured in the device map
• decoupled backend and device
  • restructured and refactured the backend protocols
  • added MultiDeviceBackend protocol
  • added BatchJobBackend protocol
• updated ideal and hardware simulator for new backend protocols
• moved topology namespace to domain
• enabled topology optimizations to the hardware simulator
• simplified circuit optimization pipeline code
  • introduced optimization context
• added statistics for circuits and optimizations
• improved the operation registry
  • added the measure operation
• made current QASM 2/3 handling more robust
• added EBNF grammars for OpenQASM 2/3 adapted from the ANTLR grammars
• added OpenQASM 2/3 parsers with instaparse for improved compatibility including expression evaluation
• improved docstrings
• updated the tutorial to reflect the backend changes

Version 0.15.0

• extracted topology namespace from hardware-optimization
  • differenciated between coupling and topology
  • added coupling-for-topology and all-to-all-coupling
• qubit and gate optimizations throw an exception when the optimization leads to an empty circuit
• hardware simulator creates a failed job on optimization failures
• activated hardware optimizations in hardware simulator
• removed create-noisy-simulator, use create-hardware-simulator
• integrated trajectory-state pipeline with result extraction to hardware simulator
• extracted common framework for variational algorithms
• improved VQE/QAOA optimization and integrated result extraction
• added standard gate library import to generated QASM3
• shortened some spec names by removing the quantum prefix
• renamed math.core namespace to math.complex-linear-algebra
• restructured and enhanced the tutorial
• registered project with zenodo.org for DOI generation
  • makes qclojure releases citeable in papers

Version 0.14.0

• simulator enhancements
  • renamed simulator namespace to ideal-simulator
    • transports the role of the simulator
  • renamed noisy-simulator namespace to hardware-simulator
    • transforming noisy simulator in a full quantum hardware simulator
    • use device profiles for max qubits, native gates, topology and noise model
    • optimize circuits for native gate set and topology
  • integrating result extraction in simulators (work in progress) done for ideal simulator
• removed native hardware gate sets from operation-registry
  • device profiles provide the information about native gates
• improved noise application in noisy simulator
• added density matrix functions in state, obervables and hamiltonian namespaces
• improved measurement probabilities calculation for observables
• improved vector encoding and accuracy assesment in HHL algorithm
• improved Simon's algorithm
• integrating result extraction in algorithms (work in progress)
  • done for Deutsch, BV, Simon, Grover and QPE
• moved QPE related functions from quantum-period-finging to quantum-phase-estimation
• improved complex linear algebra backends
  • fixed bug in eigen-hermitian in fastmath backend
  • sorted eigen decompositions consistently across functions and backends
  • fixed matrix-log to compute the complex logarithm in the case of negative eigenvalues too
  • added diagonal? to MatrixAlgebra protocol and implementations
• added and improved docstrings
• updated the tutorial

Version 0.13.0

• added unified, comprehensive result preparation/extraction, supports
  • :measurements (basic sampling)
  • :observables (observable expectations)
  • :variance (observable variances)
  • :hamiltonian (hamiltonian energy)
  • :probabilities (probability distributions)
  • :amplitudes (amplitude extraction)
  • :state-vector (simulation only)
  • :density-matrix (simulation only)
  • :fidelity (fidelity analysis)
  • :sample (sampling for QPU hardware)
• changed the return type of execute-circuit to return a map instead of just the state vector to incorporate the result types
  • use (:final-state result) to extract the state-vector
• improved QASM2/3 support
  • added missing QClojure gates
  • added result type pragmas for QASM3
  • improved problem reporting
• added hardware topology visualization
  • supports linear, grid, star and ring topologies
• moved visualization namespace from adapter to application

Version 0.12.0

• added Quantum Approximate Optimization Algorithm (QAOA) for Max-CUT, Max-SAT and TSP problems
• added parameter values to tooltips in SVG circuit visualization
• added lein profiles with JVM options for bigger simulations and for running in a container
• enhanced and improved the tutorial

Version 0.11.1

• removed unfinished neanderthal backend
• updated the tutorial

Version 0.11.0

• added protocols for complex linear algebra backends
• implemented complex linear algebra on clojure.math
• implemented complex linear algebra on fastmath
• added clojure.math based linear algebra backend
• added fastmath based linear algebra backend
• added public API for linear algebra in math.core
• added benchmarks for linear algebra backends
• improved layout of the svg circuit visualization
• removed duplicated code
• increased test coverage
• updated tutorial

Version 0.10.0

• added domain namespaces for hamiltonian and ansatz functions
• added chemistry inspired ansatz
• added optimization namespace in algorithms
• added various optimization methods to be used with vqe-optimization
• moved linear algebra functions to seperate namespace
• fixed HHL measurement
• updated docstrings
• updated tutorial

Version 0.9.0

• added variational quantum eigensolver algorithm
• added heavy-hex-topology (up to 127 qubits)
• refactored error mitigation for backend support
• added QPU data to backend namespace
• added basis-strings and basis-labels functions
• updated tutorial

Version 0.8.0

• improved x-axis label placement in bar charts
• improved color palette generation
• aligned return value of algorithms to include
  • success
  • result
  • execution result
  • circuit
• fixed bugs in grover algorithm
• enhanced tutorial

Version 0.7.0

• added error mitigation strategies
  • readout error mitigation
  • zero noise extrapolation
  • symmetry verification
  • virtual distillation
• moved noise functions to application.noise namespace
• added correlated readout errors
• refactored noisy simulator to use noise namespace

Version 0.6.0

• added observables namespace
• added gate cancellation optimization
• added rydberg and global-drive gate support for neutral atom QPUs
• defined computational basis states for 3 qubits
• updated circuit optimization pipeline
• consolidated operation-qubits-with-spans functions
• fixed measurement filtering in circuit inversion
• fixed layer assignment for circuit visualization
• improved gate tests
• fixed fredkin gate
• enhanced tutorial

Version 0.5.0

• improved svg blochsphere visualization
• improved y-axis labels in svg state visualization
• extracted gate layering functions
• added gate layering to the ascii circuit visualisation
• improved gate spacing in ascii circuit visualisation
• added channel namespace for quantum channel operations
• refactored noisy simulator to use quantum channel functions
• added plus-i-state and minus-i-state functions
• added |+i⟩ and |-i⟩ states
• use matrix instead of phase gate to define s and s-dag gates
• moved hardware optimizations to application layer
• moved oracle functions from grover-test to grover ns
• moved complex? predicate to math
• extracted methods from tests
• enhanced tutorial

Version 0.4.0

• added device map in backend, moved noise models to device map
• unified functions for ideal and noisy simulators
• improved quantum period finding
• added quantum arithmetic functions
• improved svg circuit visualization
• enhanced tutorial

Version 0.3.0

• implemented HHL algorithm for hermitian n x n matrices
• enhanced gate decomposition
  • parameterized gates
  • hardware specific native gate sets
• splitted circuit-transformation namespace into
  • gate-decomposition for the decomposition of gates for different hardware
  • circuit-composition to extend and compose circuits
  • qubit-optimization to reduce the number of qubits needed
• fixed noise application in noisy simulator
• enhanced tests
• updated tutorial

Version 0.2.0

• added a noisy simulator backend to simulate errors of real quantum hardware
• improved circuit optimization pipeline
• generalized quantum phase estimation and integrated in quantum-period-finding
• phase estimation handles the number of measurements, reduced the number of circuit creations
• fixed edge cases for quantum phase estimation
• fixed coprime selection in shor
• refactored tests for quantum period finding
• used a single state atom in simulators
• added perfect power factor to math
• added prime? and complete-factorization functions
• added more tests for the math namespace
• added prime check in shor

Version 0.1.0

• implemented quantom states, quantum gates, gate registry and quantum cirquits
• implemented quantum backend protocol with a simulator implementation
• implemented a cirquit transformer and optimizer
• implemented quantum algorithms
• implemented visualizations in ascii and svg and html formats