Why do we need Q#?

a year ago

The Q# blog is a developer- and community-focused partner to the Microsoft Quantum blog, featuring technical posts, deep dives, tutorials, event announcements, and release information.
Q# was developed to write quantum algorithms, not circuits, focusing on execution on quantum hardware rather than simulation.
Key requirements for Q# include abstract qubit management, integrated quantum and classical computation, support for higher-order protocols and transformations, and delegation of tasks like gate synthesis to the compiler.
Q# evolved from an initial attempt using F# to a domain-specific language to better meet scalability and development needs.
Q# treats the quantum computer as an accelerator, with a main application program in a .NET language and quantum code as a subroutine.
Design principles for Q# include starting minimal, being quantum first, using libraries over language features, and maintaining clear semantics for compiler optimizations.
Q# features include qubit management as a resource, first-class operations for protocols like phase estimation, and adjoint and controlled derivations for operations.
Q# supports general classical control flow and rich classical computation, enabling adaptive algorithms and runtime variation in gate sequences.

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