lambda calculus

Two linearities for quantum computing in the lambda calculus

We propose a way to unify two approaches of non-cloning in quantum lambda-calculi: logical and algebraic linearities. The first approach is to forbid duplicating variables, while the second is to consider all lambda-terms as algebraic-linear …

Realizability in the Unitary Sphere

In this paper we present a semantics for a linear algebraic lambda-calculus based on realizability. This semantics characterizes a notion of unitarity in the system, answering a long standing issue. We derive from the semantics a set of typing rules …

A Lambda Calculus for Density Matrices with Classical and Probabilistic Controls

In this paper we present two flavors of a quantum extension to the lambda calculus. The first one, 𝜆𝜌, follows the approach of classical control/quantum data, where the quantum data is represented by density matrices. We provide an interpretation for …

Typing Quantum Superpositions and Measurement

We propose a way to unify two approaches of non-cloning in quantum lambda-calculi. The first approach is to forbid duplicating variables, while the second is to consider all lambda-terms as algebraic-linear functions. We illustrate this idea by …

The Geometry of Parallelism: Classical, Probabilistic, and Quantum Effects

We introduce a Geometry of Interaction model for higher-order quantum computation, and prove its adequacy for a fully fledged quantum programming language in which entanglement, duplication, and recursion are all available. This model is an instance …

Physics, Topology, Logic and Computation: A Rosetta Stone

In physics, Feynman diagrams are used to reason about quantum processes. In the 1980s, it became clear that underlying these diagrams is a powerful analogy between quantum physics and topology. Namely, a linear operator behaves very much like a …

The Arrow Calculus as a Quantum Programming Language

We express quantum computations (with measurements) using the arrow calculus extended with monadic constructions. This framework expresses quantum programming using well-understood and familiar classical patterns for programming in the presence of …

A Brief Survey of Quantum Programming Languages

This article is a brief and subjective survey of quantum programming language research.