fock_state_ook, squeezed_coherent_bpsk

valbert4 · valbert4 · commit 0a5f5760c76a · 2026-05-26T13:10:25.000-04:00
diff --git a/codes/classical/analog/modulation/fsk.yml b/codes/classical/analog/modulation/fsk.yml
@@ -7,9 +7,14 @@ code_id: fsk
 physical: reals
 logical: reals
 
-name: 'Frequency-shift keying (FSK) code'
+name: 'Frequency-shift keying (FSK) modulation format'
 short_name: 'FSK'
 
+alternative_names:
+  - 'Frequency-shift keying (FSK) modulation code'
+  - 'Frequency-shift keying (FSK) modulation scheme'
+  - 'Frequency-shift keying (FSK) signaling format'
+
 description: |
   A \(q\)-ary frequency-shift keying (\(q\)-FSK) encodes one \(q\)-ary digit of information into signals with \(q\) different frequencies.
   In its standard orthogonal form, each symbol is carried by one of \(q\) approximately orthogonal tones over a fixed symbol interval.
diff --git a/codes/classical/analog/modulation/pam.yml b/codes/classical/analog/modulation/pam.yml
@@ -7,8 +7,13 @@ code_id: pam
 physical: reals
 logical: reals
 
-name: 'Pulse-amplitude modulation (PAM) code'
+name: 'Pulse-amplitude modulation (PAM) format'
 short_name: 'PAM'
+
+alternative_names:
+  - 'Pulse-amplitude modulation (PAM) code'
+  - 'Pulse-amplitude modulation (PAM) scheme'
+  - 'Pulse-amplitude modulation (PAM) signaling format'
 #introduced: '\cite{}'
 
 description: |
diff --git a/codes/classical/analog/modulation/qam.yml b/codes/classical/analog/modulation/qam.yml
@@ -7,9 +7,14 @@ code_id: qam
 physical: reals
 logical: reals
 
-name: 'Quadrature-amplitude modulation (QAM) code'
+name: 'Quadrature-amplitude modulation (QAM) format'
 short_name: 'QAM'
 
+alternative_names:
+  - 'Quadrature-amplitude modulation (QAM) code'
+  - 'Quadrature-amplitude modulation (QAM) scheme'
+  - 'Quadrature-amplitude modulation (QAM) signaling format'
+
 description: |
   Encodes into a finite set of points in \(\mathbb{R}^{2}\), often treated as \(\mathbb{C}\).
   Each point is associated with a complex amplitude of an electromagnetic signal, so information is encoded jointly in the in-phase and quadrature components \cite[Ch. 16]{doi:10.1017/9781316822708}.
diff --git a/codes/classical/spherical/modulation/bpsk.yml b/codes/classical/spherical/modulation/bpsk.yml
@@ -7,11 +7,14 @@ code_id: bpsk
 physical: spheres
 logical: reals
 
-name: 'Binary PSK (BPSK) code'
+name: 'Binary PSK (BPSK) modulation format'
 short_name: 'BPSK'
 introduced: '\cite{doi:10.1002/j.1538-7305.1948.tb00917.x}'
 
 alternative_names:
+  - 'Binary PSK (BPSK) modulation code'
+  - 'Binary PSK (BPSK) modulation scheme'
+  - 'Binary PSK (BPSK) signaling format'
   - 'Binary antipodal modulation'
   - 'Phase-reversal keying (PRK)'
   - 'Antipodal signaling'
diff --git a/codes/classical/spherical/modulation/ppm.yml b/codes/classical/spherical/modulation/ppm.yml
@@ -7,9 +7,14 @@ code_id: ppm
 physical: spheres
 logical: reals
 
-name: 'Pulse-position modulation (PPM) code'
+name: 'Pulse-position modulation (PPM) format'
 short_name: 'PPM'
 
+alternative_names:
+  - 'Pulse-position modulation (PPM) code'
+  - 'Pulse-position modulation (PPM) scheme'
+  - 'Pulse-position modulation (PPM) signaling format'
+
 description: |
   A modulation code with \(q\) equal-energy signals in which each codeword has one pulse in one of \(q\) time slots and zeros elsewhere.
 
diff --git a/codes/classical/spherical/modulation/psk.yml b/codes/classical/spherical/modulation/psk.yml
@@ -7,9 +7,14 @@ code_id: psk
 physical: spheres
 logical: reals
 
-name: 'Phase-shift keying (PSK) code'
+name: 'Phase-shift keying (PSK) modulation format'
 short_name: 'PSK'
 
+alternative_names:
+  - 'Phase-shift keying (PSK) modulation code'
+  - 'Phase-shift keying (PSK) modulation scheme'
+  - 'Phase-shift keying (PSK) signaling format'
+
 description: |
   A \(q\)-ary phase-shift keying (\(q\)-PSK) encodes one \(q\)-ary digit of information into a constellation of \(q\) points distributed equidistantly on a circle in \(\mathbb{C}\) or, equivalently, \(\mathbb{R}^2\).
 
diff --git a/codes/classical/spherical/modulation/qpsk.yml b/codes/classical/spherical/modulation/qpsk.yml
@@ -7,14 +7,17 @@ code_id: qpsk
 physical: spheres
 logical: reals
 
-name: 'Quadrature PSK (QPSK) code'
+name: 'Quadrature PSK (QPSK) modulation format'
 short_name: 'QPSK'
 introduced: '\cite{doi:10.1109/TCE.1962.6373228}'
 
 alternative_names:
-  - 'Quadriphase PSK code'
-  - '4-PSK code'
-  - '4-QAM code'
+  - 'Quadrature PSK (QPSK) modulation code'
+  - 'Quadrature PSK (QPSK) modulation scheme'
+  - 'Quadrature PSK (QPSK) signaling format'
+  - 'Quadriphase PSK modulation format'
+  - '4-PSK modulation format'
+  - '4-QAM modulation format'
 
 description: |
   A quaternary encoding into a constellation of four points distributed equidistantly on a circle.
diff --git a/codes/classical_into_quantum/oscillators/bosonic_classical_into_quantum.yml b/codes/classical_into_quantum/oscillators/bosonic_classical_into_quantum.yml
@@ -9,11 +9,20 @@ logical: reals
 
 name: 'Bosonic c-q code'
 
+alternative_names:
+  - 'Bosonic c-q modulation format'
+  - 'Bosonic c-q modulation scheme'
+  - 'Bosonic c-q modulation code'
+  - 'Bosonic c-q signaling format'
+
 description: |
   Bosonic code designed for transmission of classical information through non-classical channels.
+  Encodes classical symbols into bosonic quantum states for transmission over a quantum channel and decoding with a quantum-enhanced \textit{receiver}.
+  This entry includes bosonic c-q modulation formats and is distinct from a \hyperref[code:modulation]{classical modulation scheme}, which maps classical symbols into classical electromagnetic signals for transmission over classical channels.
+  A bosonic c-q modulation format instead treats the transmitted signals as quantum states and allows the receiver to use quantum measurements.
 
 features:
-  rate: 'The Holevo capacity has been calculated for various bosonic quantum channels \cite{doi:10.1109/JSTQE.2009.2024959,arxiv:2002.05766,doi:10.1515/9783110642490} such as the lossy bosonic channel \cite{arxiv:quant-ph/0308012} or quantum AWGN \cite{arxiv:1312.6225}.
+  rate: 'The Holevo capacity has been calculated for various bosonic quantum channels \cite{doi:10.1109/JSTQE.2009.2024959,arxiv:2002.05766,doi:10.1515/9783110642490} such as the \hyperref[topic:ad]{pure-loss bosonic channel} \cite{arxiv:quant-ph/0308012} or quantum AWGN \cite{arxiv:1312.6225}.
   The energy-constrained capacity of the noiseless bosonic c-q channel is finite due to quantum effects \cite{doi:10.1103/PhysRevLett.70.363,doi:10.1103/RevModPhys.66.481}, while the Shannon capacity can be infinite.
   Gordon was the first to calculate such capacities (in a published work) for a specific case \cite{manual:{J. P. Gordon, in Advances in Quantum Electronics edited by J. R. Singer (Columbia University, New York, 1961), p. 509},doi:10.1109/JRPROC.1962.288169,manual:{J. P. Gordon, in Quantum Electronics and Coherent Light, Proceedings of the International School of Physics “Enrico Fermi”, Course XXXI, edited by PA. Miles (Academic, New York, 1964), p. 156}}, and a related discussion is given by Forney \cite{manual:{G. D. Forney, Jr., S.M. thesis, Massachusetts Institute of Technology, 1963 (unpublished)}}.
   The most information-efficient format of a transmitted message is indistinguishable from black-body radiation \cite{arxiv:cond-mat/9907500}.'
@@ -24,6 +33,8 @@ relations:
   cousins:
     - code_id: oscillators
       detail: 'Bosonic c-q codes are bosonic codes designed to transmit classical information.'
+    - code_id: modulation
+      detail: 'Classical modulation schemes transmit classical signals over classical channels, while bosonic c-q modulation formats transmit quantum states over quantum channels and can use quantum-enhanced receivers.'
 
 
 # Begin Entry Meta Information
diff --git a/codes/classical_into_quantum/oscillators/coherent_state/coherent_state_c-q.yml b/codes/classical_into_quantum/oscillators/coherent_state/coherent_state_c-q.yml
@@ -7,7 +7,12 @@ code_id: coherent_state_c-q
 physical: oscillators
 logical: reals
 
-name: 'Coherent-state c-q code'
+name: 'Coherent-state c-q modulation format'
+
+alternative_names:
+  - 'Coherent-state c-q modulation code'
+  - 'Coherent-state c-q modulation scheme'
+  - 'Coherent-state c-q signaling format'
 
 description: |
   Bosonic c-q code whose codewords form a constellation of coherent states.
@@ -32,7 +37,7 @@ description: |
   For a finite constellation, unambiguous state discrimination is possible only if the coherent states in the codebook are linearly independent.
 
 features:
-  rate: 'Random Gaussian-distributed coherent-state c-q codes achieve the capacity of the lossy bosonic channel \cite{arxiv:quant-ph/0308012}.'
+  rate: 'Random Gaussian-distributed coherent-state c-q codes achieve the capacity of the \hyperref[topic:ad]{pure-loss bosonic channel} \cite{arxiv:quant-ph/0308012}.'
   decoders:
     - 'Optimal receiver performance in ambiguous state discrimination is determined using the \textit{Yuen-Kennedy-Lax (YKL) conditions} \cite{doi:10.1109/TIT.1975.1055351}.
     See review \cite{doi:10.1116/5.0036959} for details on receivers used for coherent-state c-q codes.'
@@ -53,8 +58,6 @@ relations:
   cousins:
     - code_id: coherent_constellation
       detail: 'Coherent-state c-q codes encode classical alphabets into constellations of coherent states, while coherent-state constellation codes encode quantum information into superpositions of coherent states.'
-    - code_id: modulation
-      detail: 'Coherent-state c-q codes are modulation schemes for transmission of classical information over quantum optical channels.'
 
 
 # Begin Entry Meta Information
diff --git a/codes/classical_into_quantum/oscillators/coherent_state/niset_andersen_cerf.yml b/codes/classical_into_quantum/oscillators/coherent_state/niset_andersen_cerf.yml
@@ -26,12 +26,12 @@ features:
 realizations:
   - 'Realized in Ref. \cite{arxiv:1006.3941} in an optical system with 3 beam splitters. The fidelity peaked around \(0.6\) for the deterministic approach, and around \(0.77\) for the probabilistic approach (with a 25\% chance of error).'
 
+
+# Whether NAC code is a modulation scheme is debatable
 relations:
   parents:
     - code_id: coherent_state_c-q
-  cousins:
-    - code_id: qam
-      detail: 'The Niset-Andersen-Cerf code encodes two coherent states at a time with arbitrary complex values, making it analogous to a two-point QAM code. The code does not encode any quantum information since superpositions of the coherent states are not stored. However, analysis of the code is done via a quantum treatment.'
+      detail: 'The Niset-Andersen-Cerf code uses coherent states but functions as an erasure-protection code.'
 
 
 # Begin Entry Meta Information
diff --git a/codes/classical_into_quantum/oscillators/coherent_state/psk/quantum_bpsk.yml b/codes/classical_into_quantum/oscillators/coherent_state/psk/quantum_bpsk.yml
@@ -7,9 +7,14 @@ code_id: quantum_bpsk
 physical: oscillators
 logical: reals
 
-name: 'BPSK c-q code'
+name: 'BPSK c-q modulation format'
 #introduced: '\cite{doi:10.1038/nphoton.2014.280}'
 
+alternative_names:
+  - 'BPSK c-q modulation code'
+  - 'BPSK c-q modulation scheme'
+  - 'BPSK c-q signaling format'
+
 description: 'Coherent-state c-q binary code encoding into two coherent states \(|\pm\alpha\rangle\) for complex \(\alpha\).
 A shifted version, with codewords \(\{|0\rangle,|\alpha\rangle\}\), is called binary amplitude modulation (BAM),
 The three-state subcode \(\{|\alpha,\alpha\rangle,|-\alpha,\alpha\rangle,|\alpha,-\alpha\rangle\}\) of two-mode BPSK is called the \textit{single-degeneracy code} \cite{arxiv:1101.1550}.'
@@ -41,6 +46,8 @@ relations:
   parents:
     - code_id: quantum_psk
     - code_id: quantum_hadamard_bpsk
+    - code_id: squeezed_coherent_bpsk
+      detail: 'Squeezed-coherent BPSK c-q modulation reduces to coherent-state BPSK c-q modulation when the squeezing parameter is zero.'
   cousins:
     - code_id: bpsk
       detail: 'BPSK (BPSK c-q) codes are used to transmit classical information using antipodal coherent states over classical (quantum) channels.'
diff --git a/codes/classical_into_quantum/oscillators/coherent_state/psk/quantum_hadamard_bpsk.yml b/codes/classical_into_quantum/oscillators/coherent_state/psk/quantum_hadamard_bpsk.yml
@@ -7,9 +7,14 @@ code_id: quantum_hadamard_bpsk
 physical: oscillators
 logical: reals
 
-name: 'Hadamard BPSK c-q code'
+name: 'Hadamard BPSK c-q modulation format'
 introduced: '\cite{arxiv:1101.1550}'
 
+alternative_names:
+  - 'Hadamard BPSK c-q modulation code'
+  - 'Hadamard BPSK c-q modulation scheme'
+  - 'Hadamard BPSK c-q signaling format'
+
 description: |
   Multimode coherent-state c-q code that is a concatenation of a Hadamard code with a BPSK c-q code.
   Its codewords are \(n\)-mode coherent states whose components \(\pm\alpha\) are arranged according to rows of a Hadamard matrix.
diff --git a/codes/classical_into_quantum/oscillators/coherent_state/psk/quantum_psk.yml b/codes/classical_into_quantum/oscillators/coherent_state/psk/quantum_psk.yml
@@ -7,9 +7,14 @@ code_id: quantum_psk
 physical: oscillators
 logical: reals
 
-name: 'PSK c-q code'
+name: 'PSK c-q modulation format'
 introduced: '\cite{doi:10.1038/nphoton.2014.280}'
 
+alternative_names:
+  - 'PSK c-q modulation code'
+  - 'PSK c-q modulation scheme'
+  - 'PSK c-q signaling format'
+
 description: 'Coherent-state c-q \(q\)-ary code whose \(j\)th codeword corresponds to a coherent state whose phase is the \(j\)th multiple of \(2\pi/q\). These states are also called geometrically uniform states (GUS) \cite{doi:10.1109/18.915636}.'
 
 protection: |
diff --git a/codes/classical_into_quantum/oscillators/coherent_state/quantum_fsk.yml b/codes/classical_into_quantum/oscillators/coherent_state/quantum_fsk.yml
@@ -7,10 +7,15 @@ code_id: quantum_fsk
 physical: oscillators
 logical: reals
 
-name: Coherent FSK (CFSK) c-q code
+name: 'Coherent FSK (CFSK) c-q modulation format'
 short_name: CFSK c-q
 introduced: '\cite{arxiv:1802.08287,doi:10.1103/PRXQuantum.1.010308}'
 
+alternative_names:
+  - 'Coherent FSK (CFSK) c-q modulation code'
+  - 'Coherent FSK (CFSK) c-q modulation scheme'
+  - 'Coherent FSK (CFSK) c-q signaling format'
+
 description: |
   \hyperref[code:coherent_state_c-q]{Coherent-state c-q code} encoding into coherent states that are frequency-shifted with certain initial relative phase.
 
@@ -36,10 +41,10 @@ realizations:
 
 relations:
   parents:
-  - code_id: coherent_state_c-q
+    - code_id: coherent_state_c-q
   cousins:
-  - code_id: fsk
-    detail: 'Coherent FSK c-q codes are classical-quantum analogues of FSK codes.'
+    - code_id: fsk
+      detail: 'Coherent FSK c-q codes are classical-quantum analogues of FSK codes.'
 
 
 # Begin Entry Meta Information
diff --git a/codes/classical_into_quantum/oscillators/coherent_state/quantum_ook.yml b/codes/classical_into_quantum/oscillators/coherent_state/quantum_ook.yml
@@ -7,10 +7,15 @@ code_id: quantum_ook
 physical: oscillators
 logical: reals
 
-name: 'On-off keyed (OOK) c-q code'
+name: 'On-off keyed (OOK) c-q modulation format'
 short_name: 'OOK c-q'
 introduced: '\cite{doi:10.1038/nature05655}'
 
+alternative_names:
+  - 'On-off keyed (OOK) c-q modulation code'
+  - 'On-off keyed (OOK) c-q modulation scheme'
+  - 'On-off keyed (OOK) c-q signaling format'
+
 description: 'Coherent-state c-q binary code whose encoding is either in the vacuum \(|0\rangle\) or in a nonzero coherent state \(|\alpha\rangle\).'
 
 protection: |
diff --git a/codes/classical_into_quantum/oscillators/coherent_state/quantum_ppm.yml b/codes/classical_into_quantum/oscillators/coherent_state/quantum_ppm.yml
@@ -7,9 +7,14 @@ code_id: quantum_ppm
 physical: oscillators
 logical: reals
 
-name: 'PPM c-q code'
+name: 'Pulse-position (PPM) c-q modulation format'
 introduced: '\cite{arxiv:1111.4017}'
 
+alternative_names:
+  - 'Pulse-position (PPM) c-q modulation code'
+  - 'Pulse-position (PPM) c-q modulation scheme'
+  - 'Pulse-position (PPM) c-q signaling format'
+
 description: |
   A \(q\)-PPM c-q code is a coherent-state c-q code whose \(j\)th codeword corresponds to a tensor-product state of zero-amplitude coherent states at all modes except mode \(j\).
   For example, a 3-PPM encoding corresponds to the three-mode states \(|\alpha\rangle|0\rangle|0\rangle\), \(|0\rangle|\alpha\rangle|0\rangle\), and \(|0\rangle|0\rangle|\alpha\rangle\) for some complex \(\alpha\).
diff --git a/codes/classical_into_quantum/oscillators/fock_state_ook.yml b/codes/classical_into_quantum/oscillators/fock_state_ook.yml
@@ -0,0 +1,50 @@
+#######################################################
+## This is a code entry in the error correction zoo. ##
+##       https://github.com/errorcorrectionzoo       ##
+#######################################################
+
+code_id: fock_state_ook
+physical: oscillators
+logical: reals
+
+name: 'Fock-state OOK c-q modulation format'
+short_name: 'Fock OOK c-q'
+introduced: '\cite{doi:10.1109/ITA.2012.6181832}'
+
+alternative_names:
+  - 'Number-state OOK c-q modulation format'
+  - 'Fock-state OOK c-q modulation code'
+  - 'Fock-state OOK c-q modulation scheme'
+  - 'Fock-state OOK c-q signaling format'
+  - 'Single-photon OOK c-q modulation format'
+  - 'Single-rail c-q code'
+
+description: |
+  Bosonic c-q on-off keying (OOK) modulation format whose binary alphabet consists of the vacuum state \(|0\rangle\) and the single-photon Fock state \(|1\rangle\) of one mode.
+  More generally, the nonzero OOK symbol can be a number state or a mixture of adjacent number states.
+  Fock-state OOK with photon-number detection was analyzed as a nonclassical alternative to coherent-state OOK for photon-efficient communication \cite{doi:10.1109/ITA.2012.6181832}.
+
+features:
+  decoders:
+    - 'Photon-number detection distinguishes the erasure/loss-degraded output alphabet by detecting whether photons are present in the received mode \cite{doi:10.1109/ITA.2012.6181832,arxiv:1410.4575}.'
+    - 'Number-state modulation with photon detection, including the numerical observation that the optimal prior distribution can be multimodal, was studied in Ref. \cite[Ch. 5]{manual:{S. Guha, “Classical capacity of the free-space quantum-optical channel”, S.M. thesis, Massachusetts Institute of Technology (2004), \href{http://hdl.handle.net/1721.1/87908}{URL}}}. Later work on incoherent OOK and PPM quantified improvements from sub-Poissonian nonclassical light and used Fock states as the nonclassical low-photon-number alphabet \cite{arxiv:1410.4575}.'
+
+
+relations:
+  parents:
+    - code_id: bosonic_classical_into_quantum
+  cousins:
+    - code_id: quantum_ook
+      detail: 'Fock-state OOK and coherent-state OOK both use a vacuum off symbol, but their on symbols are respectively a single-photon number state and a coherent state.'
+    - code_id: fock_state
+      detail: 'Fock-state OOK transmits classical information using Fock states, while Fock-state bosonic codes store quantum information in subspaces built from Fock states.'
+
+
+# Begin Entry Meta Information
+_meta:
+  # Change log - most recent first
+  changelog:
+    - user_id: SaikatGuha
+      date: '2026-05-26'
+    - user_id: VictorVAlbert
+      date: '2026-05-26'
diff --git a/codes/classical_into_quantum/oscillators/squeezed_coherent_bpsk.yml b/codes/classical_into_quantum/oscillators/squeezed_coherent_bpsk.yml
diff --git a/users/users_db.yml b/users/users_db.yml
