From 36065fd6a55953f04228294969980d5810cf0934 Mon Sep 17 00:00:00 2001
From: "Victor V. Albert" <valbert4@gmail.com>
Date: Thu, 5 Dec 2024 11:19:03 -0500
Subject: [PATCH] chern_simons_gkp

---
 .../stabilizer/lattice/chern_simons_gkp.yml   | 34 +++++++++++++++++++
 .../lattice/gkp_surface_concatenated.yml      |  3 ++
 2 files changed, 37 insertions(+)
 create mode 100644 codes/quantum/oscillators/stabilizer/lattice/chern_simons_gkp.yml

diff --git a/codes/quantum/oscillators/stabilizer/lattice/chern_simons_gkp.yml b/codes/quantum/oscillators/stabilizer/lattice/chern_simons_gkp.yml
new file mode 100644
index 000000000..d443011d0
--- /dev/null
+++ b/codes/quantum/oscillators/stabilizer/lattice/chern_simons_gkp.yml
@@ -0,0 +1,34 @@
+#######################################################
+## This is a code entry in the error correction zoo. ##
+##       https://github.com/errorcorrectionzoo       ##
+#######################################################
+
+code_id: chern_simons_gkp
+physical: oscillators
+logical: qudits
+
+name: '\(U(1)_{2n} \times U(1)_{-2m}\) Chern-Simons GKP code'
+introduced: '\cite{arxiv:2411.04993}'
+
+description: |
+  A non-CSS multimode GKP code defined on a 2D mode lattice that encodes a qudit logical space and whose excitations are characterized by the \(U(1)_{2n} \times U(1)_{-2m}\) Chern-Simons theory.
+  The code can be obtained from the analog surface code by \hyperref[topic:code-switching]{condensing} certain anyons \cite{arxiv:2411.04993}. 
+
+  The \(U(1)_{2} \times U(1)_{-4}\) case admits a topological order that is Witt non-trivial, i.e., that does not admit a gapped boundary. This order is not chiral (i.e., chiral central charge is zero) and does not admit a bosonic anyon.
+
+relations:
+  parents:
+    - code_id: multimodegkp
+    - code_id: 2d_stabilizer
+  cousins:
+    - code_id: topological_abelian
+      detail: 'The \(U(1)_{2n} \times U(1)_{-2m}\) Chern-Simons GKP code realizes \(U(1)_{2n} \times U(1)_{-2m}\) Chern-Simons theory on bosonic modes. The code can be obtained from the analog surface code by \hyperref[topic:code-switching]{condensing} certain anyons \cite{arxiv:2411.04993}.'
+    - code_id: analog_surface
+      detail: 'The \(U(1)_{2n} \times U(1)_{-2m}\) Chern-Simons GKP code can be obtained from the analog surface code by \hyperref[topic:code-switching]{condensing} certain anyons \cite{arxiv:2411.04993}.'
+
+
+_meta:
+  # Change log - most recent first
+  changelog:
+    - user_id: VictorVAlbert
+      date: '2024-12-04'
diff --git a/codes/quantum/oscillators/stabilizer/lattice/gkp_surface_concatenated.yml b/codes/quantum/oscillators/stabilizer/lattice/gkp_surface_concatenated.yml
index 382e0c535..157621a73 100644
--- a/codes/quantum/oscillators/stabilizer/lattice/gkp_surface_concatenated.yml
+++ b/codes/quantum/oscillators/stabilizer/lattice/gkp_surface_concatenated.yml
@@ -32,6 +32,7 @@ features:
 relations:
   parents:
     - code_id: gkp_concatenated
+    - code_id: 2d_stabilizer
   cousins:
     - code_id: toric
       detail: 'GKP codes have been concatenated with toric codes \cite{arXiv:1810.00047}.'
@@ -41,6 +42,8 @@ relations:
       detail: 'GKP codes have been concatenated with XZZX surface codes \cite{arxiv:2207.04383}.'
     - code_id: asymmetric_qecc
       detail: 'Using rectangular lattices accounts for asymmetric noise and improves the GKP-surface threshold to \(0.58\) \cite{arxiv:1810.00047}.'
+    - code_id: analog_surface
+      detail: 'The GKP-surface code can be obtained from the analog surface code by \hyperref[topic:code-switching]{condensing} certain anyons \cite{arxiv:2411.04993}.'
 
 
 # Begin Entry Meta Information