# \#quantum

**URL:** https://discourse.julialang.org/tag/quantum/15.md

[Latest](https://discourse.julialang.org/latest.md) · [Categories](https://discourse.julialang.org/categories.md) · [Tags](https://discourse.julialang.org/tags.md)

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## [\[ANN\] Paulimorphic.jl (v0.1.0): Pauli-operator algebra, fermion-to-qubit encodings, and more](https://discourse.julialang.org/t/ann-paulimorphic-jl-v0-1-0-pauli-operator-algebra-fermion-to-qubit-encodings-and-more/139410)

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**Author:** [@frankwswang](https://discourse.julialang.org/u/frankwswang)\
**Replies:** 1\
**Last updated:** [September 13, 2026, 11:09am UTC](https://discourse.julialang.org/t/ann-paulimorphic-jl-v0-1-0-pauli-operator-algebra-fermion-to-qubit-encodings-and-more/139410 "2026-09-13T11:09:47Z")

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I’m happy to announce Paulimorphic.jl, a package for constructing, transforming, and analyzing Pauli operators. The Julia ecosystem already has a few well-established packages built on Pauli operators, e.g., PauliStrings…

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## [Bug Bounties and Mini Grants for Software in Quantum Science](https://discourse.julialang.org/t/bug-bounties-and-mini-grants-for-software-in-quantum-science/117714)

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**Author:** [@Krastanov](https://discourse.julialang.org/u/Krastanov)\
**Replies:** 1\
**Last updated:** [August 14, 2026, 2:36pm UTC](https://discourse.julialang.org/t/bug-bounties-and-mini-grants-for-software-in-quantum-science/117714 "2026-08-14T14:36:15Z")

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As part of the NSF Engineering & Research Center for Quantum Networks we are building out a number of open source packages for Quantum Information Science. Those include tools for full-stack network simulation, modeling …

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## [Solving the Helium Eigenvalue Problem—where to start?](https://discourse.julialang.org/t/solving-the-helium-eigenvalue-problem-where-to-start/137783)

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**Author:** [@ducksoverip](https://discourse.julialang.org/u/ducksoverip)\
**Replies:** 8\
**Last updated:** [June 29, 2026, 7:18pm UTC](https://discourse.julialang.org/t/solving-the-helium-eigenvalue-problem-where-to-start/137783 "2026-06-29T19:18:53Z")

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I have inherited Fortran code (the same one in this paper) that solves the time-independent Schrodinger equation for the ground state of the helium atom. This is generally a very difficult problem because the Schrodinger…

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## [\[ANN\] QRecoupling.jl: Exact & stable evaluation of quantum recoupling symbols, fusion tensors and q-hypergeometric series](https://discourse.julialang.org/t/ann-qrecoupling-jl-exact-stable-evaluation-of-quantum-recoupling-symbols-fusion-tensors-and-q-hypergeometric-series/137135)

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**Author:** [@seth](https://discourse.julialang.org/u/seth)\
**Replies:** 2\
**Last updated:** [May 20, 2026, 12:11am UTC](https://discourse.julialang.org/t/ann-qrecoupling-jl-exact-stable-evaluation-of-quantum-recoupling-symbols-fusion-tensors-and-q-hypergeometric-series/137135 "2026-05-20T00:11:36Z")

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I’m happy to share QRecoupling.jl, a new Julia package for the exact and numerically stable evaluation of quantum recoupling coefficients ( quantum 3j- and 6j-symbols), topological fusion data (F-symbols, R-matrices), an…

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## [Stochastic filtration problem](https://discourse.julialang.org/t/stochastic-filtration-problem/134713)

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**Author:** [@ymuv1](https://discourse.julialang.org/u/ymuv1)\
**Replies:** 1\
**Last updated:** [December 23, 2025, 7:13pm UTC](https://discourse.julialang.org/t/stochastic-filtration-problem/134713 "2025-12-23T19:13:46Z")

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Hi all, I’m working with a physical system whose state u(t) follows an SDE du=f(u,t)dt+g(u,t)dW\_t The system produces a measured signal Y\_t given by dY\_t = h(u,t)dt+dW\_t where dW\_t is the same Wiener increment in bo…

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## [Cannot install Fermi.jl due to version constraints](https://discourse.julialang.org/t/cannot-install-fermi-jl-due-to-version-constraints/130157)

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**Author:** [@Uranium238](https://discourse.julialang.org/u/Uranium238)\
**Replies:** 4\
**Last updated:** [July 3, 2025, 6:03am UTC](https://discourse.julialang.org/t/cannot-install-fermi-jl-due-to-version-constraints/130157 "2025-07-03T06:03:00Z")

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I am trying to install Fermi.jl on the newest stable release of Julia. On doing a fresh install and activating a completely new environment, when I do \] add Fermi, I am met with the following error message : (@v1.11) pk…

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## [Postdoc position in methods development for modeling in quantum information science](https://discourse.julialang.org/t/postdoc-position-in-methods-development-for-modeling-in-quantum-information-science/130434)

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**Author:** [@Krastanov](https://discourse.julialang.org/u/Krastanov)\
**Replies:** 0\
**Last updated:** [July 3, 2025, 12:50am UTC](https://discourse.julialang.org/t/postdoc-position-in-methods-development-for-modeling-in-quantum-information-science/130434 "2025-07-03T00:50:52Z")

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Postdoc Position in Quantum Information Science at UMass Amherst The Quantum Information team at UMass Amherst is involved with modeling and optimization of quantum hardware, as well as development of new modeling metho…

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## [Sensitivity of an ODEProblem defined by another package (QuantumToolbox)](https://discourse.julialang.org/t/sensitivity-of-an-odeproblem-defined-by-another-package-quantumtoolbox/129654)

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**Author:** [@Jeff\_Wack](https://discourse.julialang.org/u/Jeff_Wack)\
**Replies:** 6\
**Last updated:** [June 23, 2025, 9:08am UTC](https://discourse.julialang.org/t/sensitivity-of-an-odeproblem-defined-by-another-package-quantumtoolbox/129654 "2025-06-23T09:08:12Z")

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I am interested in calculating derivatives of a quantum state defined by QuantumToolbox with respect to system parameters in order to calculate quantum fisher information. I have found initial success with a finite diffe…

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## [GUI developer for simulation tools at the NSF Center for Quantum Networks](https://discourse.julialang.org/t/gui-developer-for-simulation-tools-at-the-nsf-center-for-quantum-networks/126782)

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**Author:** [@Krastanov](https://discourse.julialang.org/u/Krastanov)\
**Replies:** 0\
**Last updated:** [March 10, 2025, 5:57pm UTC](https://discourse.julialang.org/t/gui-developer-for-simulation-tools-at-the-nsf-center-for-quantum-networks/126782 "2025-03-10T17:57:50Z")

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The NSF Center for Quantum Networks (CQN) is looking to hire a GUI developer to work on a graphical frontend for our simulation tools. The contract is expected to be up to half a year, and up to 60k$, depending on scope,…

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## [\[ANN\] DeviceLayout.jl - CAD for quantum integrated circuits (and more?)](https://discourse.julialang.org/t/ann-devicelayout-jl-cad-for-quantum-integrated-circuits-and-more/126502)

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**Author:** [@gpeairs](https://discourse.julialang.org/u/gpeairs)\
**Replies:** 3\
**Last updated:** [March 4, 2025, 7:59pm UTC](https://discourse.julialang.org/t/ann-devicelayout-jl-cad-for-quantum-integrated-circuits-and-more/126502 "2025-03-04T19:59:54Z")

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Hello! DeviceLayout.jl is a new package for computer-aided design of superconducting quantum integrated circuits, developed at the AWS Center for Quantum Computing. The package supports the generation of 2D layouts and 3…

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## [\[ANN\] A database of quantum graph states equivalent under local operations](https://discourse.julialang.org/t/ann-a-database-of-quantum-graph-states-equivalent-under-local-operations/126013)

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**Author:** [@Krastanov](https://discourse.julialang.org/u/Krastanov)\
**Replies:** 0\
**Last updated:** [February 18, 2025, 3:10am UTC](https://discourse.julialang.org/t/ann-a-database-of-quantum-graph-states-equivalent-under-local-operations/126013 "2025-02-18T03:10:27Z")

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Quantum graph states are a useful tool to study quantum entanglement and a resource in networking and computation. Knowing whether two graph states are equivalent under local operations is quite useful when studying how …

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## [QuantumCircuitDraw.jl drawing quantum circuits in qiskit style](https://discourse.julialang.org/t/quantumcircuitdraw-jl-drawing-quantum-circuits-in-qiskit-style/125224)

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**Author:** [@Nichola](https://discourse.julialang.org/u/Nichola)\
**Replies:** 0\
**Last updated:** [January 26, 2025, 12:44pm UTC](https://discourse.julialang.org/t/quantumcircuitdraw-jl-drawing-quantum-circuits-in-qiskit-style/125224 "2025-01-26T12:44:30Z")

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Hi ! QuantumCircuitDraw.jl is a new package for plotting quantum circuits in qiskit style. Feel free to contribute ! Example : using Plots using QuantumCircuitDraw N = 5 # number of qubits steps = 8 # number of steps…

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## [Call for Proposals: Quantum Physics and Information Minisymposium](https://discourse.julialang.org/t/call-for-proposals-quantum-physics-and-information-minisymposium/125141)

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**Author:** [@kslimes](https://discourse.julialang.org/u/kslimes)\
**Replies:** 0\
**Last updated:** [January 23, 2025, 6:12pm UTC](https://discourse.julialang.org/t/call-for-proposals-quantum-physics-and-information-minisymposium/125141 "2025-01-23T18:12:19Z")

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Working at the intersection of quantum software and Julia, or know someone who is? The JuliaCon 2025 quantum minisymposium has an open call for quantum software topics through January 31, 2025 (by 23:59 EST). We’re reac…

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## [\[ANN\] TensorKit.jl v0.13](https://discourse.julialang.org/t/ann-tensorkit-jl-v0-13/122259)

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**Author:** [@lkdvos](https://discourse.julialang.org/u/lkdvos)\
**Replies:** 0\
**Last updated:** [November 4, 2024, 9:19pm UTC](https://discourse.julialang.org/t/ann-tensorkit-jl-v0-13/122259 "2024-11-04T21:19:11Z")

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Hi everyone, Together with @juthohaegeman, I’m excited to announce the release of TensorKit.jl v0.13, a Julia package designed for large-scale tensor computations with a touch of category theory. This release brings a …

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## [\[ANN\] Quasar.jl - Pure Julia OpenQASM 3 Lexing and Parsing](https://discourse.julialang.org/t/ann-quasar-jl-pure-julia-openqasm-3-lexing-and-parsing/121513)

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**Author:** [@kslimes](https://discourse.julialang.org/u/kslimes)\
**Replies:** 2\
**Last updated:** [October 31, 2024, 6:23pm UTC](https://discourse.julialang.org/t/ann-quasar-jl-pure-julia-openqasm-3-lexing-and-parsing/121513 "2024-10-31T18:23:44Z")

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Quasar.jl - Pure Julia OpenQASM3 lexing and parsing Links: GitHub Quasar.jl is a pure Julia package for lexing and parsing OpenQASM, a popular intermediate representation for quantum programs. Quasar supports: Subrout…

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## [PauliStrings.jl - Quantum many-body simulations with Pauli strings](https://discourse.julialang.org/t/paulistrings-jl-quantum-many-body-simulations-with-pauli-strings/121490)

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**Author:** [@Nichola](https://discourse.julialang.org/u/Nichola)\
**Replies:** 0\
**Last updated:** [October 19, 2024, 7:37pm UTC](https://discourse.julialang.org/t/paulistrings-jl-quantum-many-body-simulations-with-pauli-strings/121490 "2024-10-19T19:37:44Z")

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Hi all ! I’m happy to announce PauliStrings.jl a quantum many body simulation package based on the Pauli strings representation. Docs : https://paulistrings.org/ Paper : \[2410.09654\] Quantum many-body simulations with…

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## ["Compiling" HIR produced by \`ZXCalculus.jl\`](https://discourse.julialang.org/t/compiling-hir-produced-by-zxcalculus-jl/119221)

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**Author:** [@bremez](https://discourse.julialang.org/u/bremez)\
**Replies:** 5\
**Last updated:** [September 10, 2024, 5:12pm UTC](https://discourse.julialang.org/t/compiling-hir-produced-by-zxcalculus-jl/119221 "2024-09-10T17:12:13Z")

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I would like to explore the affects of ZX calculus on the synthesis of certain quantum circuits. Thankfully, I saw that Yao has a native Julia implementation in ZXCalculus.jl! However, it seems to me its documentation mi…

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## [Liouvillian superoperator way cannot run by \`timeevolution.master\_dynamic\` of QuantumOptics.jl](https://discourse.julialang.org/t/liouvillian-superoperator-way-cannot-run-by-timeevolution-master-dynamic-of-quantumoptics-jl/113650)

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**Author:** [@fqguo](https://discourse.julialang.org/u/fqguo)\
**Replies:** 12\
**Last updated:** [May 6, 2024, 3:02am UTC](https://discourse.julialang.org/t/liouvillian-superoperator-way-cannot-run-by-timeevolution-master-dynamic-of-quantumoptics-jl/113650 "2024-05-06T03:02:22Z")

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When i use the package QuantumOptics.jl to simulate the evolution of Liouvillian superoperator, i find it cannot run by the command timeevolution.master\_dynamic. Because after obtaining the superoperator, i ready to solv…

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## [Summer School on Julia in Quantum Information Science](https://discourse.julialang.org/t/summer-school-on-julia-in-quantum-information-science/113444)

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**Author:** [@Krastanov](https://discourse.julialang.org/u/Krastanov)\
**Replies:** 0\
**Last updated:** [April 24, 2024, 12:53pm UTC](https://discourse.julialang.org/t/summer-school-on-julia-in-quantum-information-science/113444 "2024-04-24T12:53:00Z")

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The NSF Center for Quantum Networks and Unitary Fund are sponsoring a summer school on Classical Numerical Methods in Quantum Information Science, taking place in Boston (August 12th-18th). Majority of the content will b…

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## [Extracting numerical results from hamiltonian using Quantica](https://discourse.julialang.org/t/extracting-numerical-results-from-hamiltonian-using-quantica/107809)

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**Author:** [@alex123](https://discourse.julialang.org/u/alex123)\
**Replies:** 7\
**Last updated:** [February 13, 2024, 7:10pm UTC](https://discourse.julialang.org/t/extracting-numerical-results-from-hamiltonian-using-quantica/107809 "2024-02-13T19:10:29Z")

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Hi, I am using Quantica for finding the band structure of twisted bilayer graphene. Here is the part of my code that finds the hamiltonian: b = hamiltonian(tbg, model) |\> bands(subdiv((0, 2, 3, 4), 20); mapping=(0, 2,…

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## [Angular Momentum Commutators In Symbolics.jl](https://discourse.julialang.org/t/angular-momentum-commutators-in-symbolics-jl/103493)

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**Author:** [@wes648](https://discourse.julialang.org/u/wes648)\
**Replies:** 2\
**Last updated:** [September 20, 2023, 1:21pm UTC](https://discourse.julialang.org/t/angular-momentum-commutators-in-symbolics-jl/103493 "2023-09-20T13:21:59Z")

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Could I get some help defining the angular momentum commutators symbolicaly in Julia? I’ve tried using SymbolicUtils @acrules to define Nx\*Ny - Ny\*Nx =\> im\*Nz but then when I run Nx\*Ny - Ny\*Nx it returns zero. I also tr…

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## [Quantum Computer Programmer](https://discourse.julialang.org/t/quantum-computer-programmer/103577)

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**Author:** [@ccoffrin](https://discourse.julialang.org/u/ccoffrin)\
**Replies:** 0\
**Last updated:** [September 6, 2023, 4:52pm UTC](https://discourse.julialang.org/t/quantum-computer-programmer/103577 "2023-09-06T16:52:50Z")

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My team is looking to hire a quantum computer programer. Previous quantum computing experience is welcome but not required. Julia coding experience is a desired skill for this role. Additional details are available here…

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## [Faster way for matrix multiplication including a Hermitian matrix with special properties](https://discourse.julialang.org/t/faster-way-for-matrix-multiplication-including-a-hermitian-matrix-with-special-properties/103177)

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**Author:** [@ahmed](https://discourse.julialang.org/u/ahmed)\
**Replies:** 6\
**Last updated:** [August 26, 2023, 2:38pm UTC](https://discourse.julialang.org/t/faster-way-for-matrix-multiplication-including-a-hermitian-matrix-with-special-properties/103177 "2023-08-26T14:38:40Z")

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I have a simple question that I hope can make certain kinds of matrix multiplications faster in my code. Is there a way to make use of matrix multiplications that are of the form phi\*P\*adjoint(phi) to make the computati…

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## [Calculation of two-time correlation function and spectrum in quantumoptics.jl](https://discourse.julialang.org/t/calculation-of-two-time-correlation-function-and-spectrum-in-quantumoptics-jl/97009)

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**Author:** [@arpan\_chatterjee](https://discourse.julialang.org/u/arpan_chatterjee)\
**Replies:** 0\
**Last updated:** [April 3, 2023, 10:52am UTC](https://discourse.julialang.org/t/calculation-of-two-time-correlation-function-and-spectrum-in-quantumoptics-jl/97009 "2023-04-03T10:52:26Z")

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If I have some time-dependent Hamiltonian whose frequency is time dependent not amplitude as described in the example of the documentation in quantumoptics.jl. Then How can I construct two-time correlation function for s…

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## [Error with gradient function in quantum reinforcement learning algorithm](https://discourse.julialang.org/t/error-with-gradient-function-in-quantum-reinforcement-learning-algorithm/96787)

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**Author:** [@SatvikDuddukuru](https://discourse.julialang.org/u/SatvikDuddukuru)\
**Replies:** 0\
**Last updated:** [March 29, 2023, 4:26pm UTC](https://discourse.julialang.org/t/error-with-gradient-function-in-quantum-reinforcement-learning-algorithm/96787 "2023-03-29T16:26:22Z")

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Hello. I am trying to implement the REINFORCE algorithm with parametrized quantum circuits from this Python tutorial (Parametrized Quantum Circuits for Reinforcement Learning | TensorFlow Quantum). To do this, I’ve imp…

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## [Research Scientist / Programmer in Quantum Information Science](https://discourse.julialang.org/t/research-scientist-programmer-in-quantum-information-science/93092)

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**Author:** [@Krastanov](https://discourse.julialang.org/u/Krastanov)\
**Replies:** 1\
**Last updated:** [January 19, 2023, 5:46pm UTC](https://discourse.julialang.org/t/research-scientist-programmer-in-quantum-information-science/93092 "2023-01-19T17:46:27Z")

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The NSF Center for Quantum Networks and UMass Amherst are looking to hire a researcher with excellent Julia skills to help in the development of simulation/control/optimization tools for quantum hardware and quantum netw…

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## [Hiring Quantum Information Science Julia programmers (cross-post)](https://discourse.julialang.org/t/hiring-quantum-information-science-julia-programmers-cross-post/93098)

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**Author:** [@Krastanov](https://discourse.julialang.org/u/Krastanov)\
**Replies:** 0\
**Last updated:** [January 17, 2023, 2:28pm UTC](https://discourse.julialang.org/t/hiring-quantum-information-science-julia-programmers-cross-post/93098 "2023-01-17T14:28:48Z")

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A cross-post for the Julia Quantum hackers that do not peruse the job board of this forum. We (The NSF Center for Quantum Networks and UMass Amherst) are hiring people interested in high-fidelity simulations of quantum …

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## [\[ANN\] Braket.jl: an experimental Julia implementation of the Amazon Braket SDK](https://discourse.julialang.org/t/ann-braket-jl-an-experimental-julia-implementation-of-the-amazon-braket-sdk/90311)

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**Author:** [@kslimes](https://discourse.julialang.org/u/kslimes)\
**Replies:** 2\
**Last updated:** [November 15, 2022, 11:59pm UTC](https://discourse.julialang.org/t/ann-braket-jl-an-experimental-julia-implementation-of-the-amazon-braket-sdk/90311 "2022-11-15T23:59:57Z")

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We’re excited to announce the release of Braket.jl, an experimental ground-up rewrite of the Amazon Braket Python SDK allowing Julia users and developers to work with Amazon Braket and quantum computing in their preferre…

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## [\[ANN\] FLOYao.jl - Fermionic linear optics for Yao.jl](https://discourse.julialang.org/t/ann-floyao-jl-fermionic-linear-optics-for-yao-jl/87837)

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**Author:** [@jlbosse](https://discourse.julialang.org/u/jlbosse)\
**Replies:** 0\
**Last updated:** [September 26, 2022, 8:21pm UTC](https://discourse.julialang.org/t/ann-floyao-jl-fermionic-linear-optics-for-yao-jl/87837 "2022-09-26T20:21:28Z")

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FLOYao.jl Is a Yao.jl backend to efficiently simulated fermionic linear optics (FLO) circuits in based on Classical simulation of noninteracting-fermion quantum circuits and Disorder-assisted error correction in Majora…

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## [AWS Center for Quantum Computing is looking for an SDE to build simulation tools!](https://discourse.julialang.org/t/aws-center-for-quantum-computing-is-looking-for-an-sde-to-build-simulation-tools/86036)

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**Author:** [@amilsted](https://discourse.julialang.org/u/amilsted)\
**Replies:** 0\
**Last updated:** [August 19, 2022, 6:36pm UTC](https://discourse.julialang.org/t/aws-center-for-quantum-computing-is-looking-for-an-sde-to-build-simulation-tools/86036 "2022-08-19T18:36:26Z")

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Having fun with Julia? Curious about quantum computing? Come build simulation tools with us! Software Engineer, Center for Quantum Computing - Job ID: 2202805 | Amazon.jobs

[Next page](https://discourse.julialang.org/tag/quantum/15.md?match_all_tags=true&page=1&tags%5B%5D=quantum)