added paper draft URL to README.txt

diff --git a/README.txt b/README.txt
index b46b4c94e8615a8c6211046f8a1488768478252c..594204cfdc2c6aa68e514108a31a39c222e9a0db 100644 (file)
--- a/README.txt
+++ b/README.txt
@@ -1,6 +1,8 @@
 Strong simulation of single-Pauli measurements using Gauss sums
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+See the draft at [https://arxiv.org/abs/2012.11739] for an introduction and description of this code.
+
 BUILD:
 
 1. Build code for Gauss sum tensor multiple you'd like to use. Here we choose k=6.