From 4cae914a616028fd81b7aba20ee0fce36bdb8f56 Mon Sep 17 00:00:00 2001
From: VVA2024 <valbert4@gmail.com>
Date: Sun, 14 Jul 2024 16:58:17 -0400
Subject: [PATCH] ampdamp_cws

---
 .../constant_excitation/dual_rail.yml         |  2 +-
 .../self_complementary.yml                    |  2 +-
 .../union_stabilizer/cws/ampdamp_cws.yml      | 31 +++++++++++++++++++
 3 files changed, 33 insertions(+), 2 deletions(-)
 rename codes/quantum/qubits/{ => nonstabilizer}/self_complementary.yml (98%)
 create mode 100644 codes/quantum/qubits/nonstabilizer/union_stabilizer/cws/ampdamp_cws.yml

diff --git a/codes/quantum/oscillators/fock_state/constant_excitation/dual_rail.yml b/codes/quantum/oscillators/fock_state/constant_excitation/dual_rail.yml
index 3ce8686bb..16b70b345 100644
--- a/codes/quantum/oscillators/fock_state/constant_excitation/dual_rail.yml
+++ b/codes/quantum/oscillators/fock_state/constant_excitation/dual_rail.yml
@@ -53,7 +53,7 @@ relations:
   cousins:
     - code_id: quantum_concatenated
       detail: 'The KLM protocol, one of the first protocols for fault-tolerant quantum computation, utilizes concatenations of the dual-rail with a stabilizer code \cite{doi:10.1038/35051009}.
-      Concatenating the dual-rail code with an \([[n,k,d]]\) stabilizer code yields an \([[2n,k,d]]\) constant-excitation code \cite{arxiv:2010.00538}.'
+      Concatenating the dual-rail code with an \([[n,k,d]]\) stabilizer code yields an \([[2n,k,d]]\) constant-excitation code \cite{arxiv:2010.00538} that protects against \(d-1\) amplitude damping errors \cite{arxiv:1001.2356}.'
     - code_id: quantum_parity
       detail: 'An \([[8,1,2]]\) QPC correcting a single amplitude damping error is equivalent to a concatenation of the \(\{|\overline{01}\rangle,|\overline{11}\rangle\}\) (constant-excitation) subcode of the \([[4,2,2]]\) code with the dual-rail code \cite{arxiv:quant-ph/0103042,arxiv:quant-ph/0501184,arxiv:2010.00538}.'
     - code_id: stab_4_2_2
diff --git a/codes/quantum/qubits/self_complementary.yml b/codes/quantum/qubits/nonstabilizer/self_complementary.yml
similarity index 98%
rename from codes/quantum/qubits/self_complementary.yml
rename to codes/quantum/qubits/nonstabilizer/self_complementary.yml
index fb0f7ec50..57c2f22eb 100644
--- a/codes/quantum/qubits/self_complementary.yml
+++ b/codes/quantum/qubits/nonstabilizer/self_complementary.yml
@@ -25,7 +25,7 @@ relations:
   parents:
     - code_id: qubits_into_qubits
   cousins:
-    - code_id: linear_binary
+    - code_id: binary_linear
       detail: 'A linear binary code is called \textit{self-complementary} if, for each codeword \(c\), its negation \(\overline{c}\) is also a codeword.'
 
 
diff --git a/codes/quantum/qubits/nonstabilizer/union_stabilizer/cws/ampdamp_cws.yml b/codes/quantum/qubits/nonstabilizer/union_stabilizer/cws/ampdamp_cws.yml
new file mode 100644
index 000000000..c8e94490c
--- /dev/null
+++ b/codes/quantum/qubits/nonstabilizer/union_stabilizer/cws/ampdamp_cws.yml
@@ -0,0 +1,31 @@
+#######################################################
+## This is a code entry in the error correction zoo. ##
+##       https://github.com/errorcorrectionzoo       ##
+#######################################################
+
+code_id: ampdamp_cws
+physical: qubits
+logical: qubits
+
+name: 'Amplitude-damping CWS code'
+introduced: '\cite{arxiv:0710.1052,arxiv:0907.5149,arxiv:1310.7536}'
+
+description: |
+  Self-complementary CWS code that is designed to detect and correct amplitude damping errors.
+
+
+relations:
+  parents:
+    - code_id: cws
+    - code_id: self_complementary
+  cousins:
+    - code_id: constantin_rao
+      detail: 'Amplitude-damping CWS codes can be obtained from CR codes \cite{arxiv:0907.5149}.'
+
+
+# Begin Entry Meta Information
+_meta:
+  # Change log - most recent first
+  changelog:
+    - user_id: VictorVAlbert
+      date: '2024-07-14'