Implement multithreaded stochastic swap in rust

Cargo.toml

@@ -0,0 +1,33 @@
+[package]
+name = "qiskit-terra"
+version = "0.20.0"
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[lib]
+name = "qiskit"
+crate-type = ["cdylib"]
+
+[dependencies]
+rayon = "1.5"
+numpy = "0.15.1"
+rand = "0.8"
+rand_pcg = "0.3"
+rand_distr = "0.4.3"
+
+[dependencies.pyo3]
+version = "0.15.1"
+features = ["extension-module", "hashbrown"]
+
+[dependencies.ndarray]
+version = "^0.15.0"
+features = ["rayon"]
+
+[dependencies.hashbrown]
+version = "0.11.2"
+features = ["rayon"]
+
+[profile.release]
+lto = 'fat'
+codegen-units = 1

MANIFEST.in

@@ -15,3 +15,6 @@ include test/python/pickles/*.pickle
 include test/python/qasm/*.qasm
 include test/python/visualization/references/*.png
 include test/python/notebooks/*.ipynb
+
+include Cargo.toml
+recursive-include src *

pyproject.toml

@@ -1,5 +1,6 @@
 [build-system]
-requires = ["Cython>=0.27.1", "setuptools", "wheel"]
+requires = ["Cython>=0.27.1", "setuptools", "wheel", "setuptools-rust"]
+build-backend = "setuptools.build_meta"
 
 [tool.black]
 line-length = 100