~

codes/classical/analog/analog.yml

@@ -14,7 +14,7 @@ alternative_names:
 
 description: |
   Encodes states (codewords) into coordinates in the \(n\)-dimensional (real or complex) coordinate space (\(\mathbb{R}^n\) or \(\mathbb{C}^n\)).
-  Such codes include sphere packings, tilings, and any other codes that use real or complex numbers for encoding.
+  Codes for storing discrete sets of symbols include sphere packings, tilings, and any other codes that use real or complex numbers for encoding.
   The number of codewords may be infinite because the coordinate space is infinite, so various restricted versions have to be constructed in practice.
 
 

codes/classical/analog/other/real_block.yml

@@ -0,0 +1,32 @@
+#######################################################
+## This is a code entry in the error correction zoo. ##
+##       https://github.com/errorcorrectionzoo       ##
+#######################################################
+
+code_id: real_block
+physical: reals
+logical: reals
+
+name: 'Real-number block code'
+introduced: '\cite{doi:10.1109/JSAC.1984.1146063}'
+
+
+description: |
+  A block code encoding a \(k\)-dimensional vector of real or complex numbers into an \(n\)-dimensional real or complex vector space.
+
+
+relations:
+  parents:
+    - code_id: analog
+      detail: 'Real-number block codes encode continuous sets of real or complex numbers into a real or complex vector space.'
+  cousins:
+    - code_id: analog_stabilizer
+      detail: 'Analog stabilizer codes are quantum versions of real-number block codes.'
+
+
+# Begin Entry Meta Information
+_meta:
+  # Change log - most recent first
+  changelog:
+    - user_id: VictorVAlbert
+      date: '2025-01-09'

codes/quantum/oscillators/oscillators.yml

@@ -94,6 +94,9 @@ relations:
   parents:
     - code_id: group_quantum
       detail: 'Group quantum codes whose physical spaces are constructed using the group of the reals \(\mathbb{R}\) under addition are bosonic codes.'
+  cousins:
+    - code_id: analog
+      detail: 'Bosonic codes are quantum version of analog codes.'
 
 
 # Begin Entry Meta Information

codes/quantum/properties/block/ampdamp.yml

@@ -22,6 +22,7 @@ protection: |
   \end{align}
   where \(\gamma\in[0,1)\) is the noise rate \cite{doi:10.1088/0954-8998/1/2/005,arxiv:1708.05010}.
   For multiple modes, error set elements are tensor products of elements of the single-mode error set. 
+  The fixed point of this channel for any truncation of Fock space is unique \cite{arxiv:0909.1596}.
 
   Restricting the channel to the first two Fock states \(\{|0\rangle,|1\rangle\}\) yields the non-Pauli qubit AD channel, which requires protecting against the loss error \(E_1\propto X+iY\) (instead of \(X\) and \(Y\) Pauli errors individually). Both channels are called AD since the context makes clear which one is being referred to.
   Other extension to qudits are also known \cite{arxiv:2008.00477}.

codes/quantum/qubits/permutation_invariant/qubit_permutation_invariant.yml

@@ -28,7 +28,7 @@ protection: |
 
 features:
   encoders:
-    - 'Finite-depth quantum circuits with LOCC for Dicke states \cite{arxiv:2307.14840,arxiv:2403.07604}.'
+    - 'Finite-depth quantum circuits with LOCC for Dicke states \cite{arxiv:2307.14840,arxiv:2403.07604,arxiv:2411.03428}.'
   general_gates:
     - 'There is a measurement-free code-switching protocol between a qubit stabilizer code and a PI qubit code \cite{arxiv:2411.13142}.'
 

codes/quantum/qubits/stabilizer/topological/surface/2d_surface/surface-17.yml

@@ -7,7 +7,7 @@ code_id: surface-17
 physical: qubits
 logical: qubits
 
-name: 'Surface-17 code'
+name: '\([[9,1,3]]\) Surface-17 code'
 introduced: '\cite{arxiv:1404.3747}'
 
 alternative_names: