Multi-pulse Fourier codes for bit transmission at the quantum limit
Bit-transmission can be enhanced by the use of quantum detection techniques, realizing a joint-detection receiver (JDR) that is able to decode transmitted signals via a collective operation and achieve the Holevo channel capacity. Explicit JDR designs proposed so far employ the Hadamard or Fourier t...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2025-01-01
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| Series: | New Journal of Physics |
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| Online Access: | https://doi.org/10.1088/1367-2630/ada4d0 |
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| author | Matteo Rosati |
| author_facet | Matteo Rosati |
| author_sort | Matteo Rosati |
| collection | DOAJ |
| description | Bit-transmission can be enhanced by the use of quantum detection techniques, realizing a joint-detection receiver (JDR) that is able to decode transmitted signals via a collective operation and achieve the Holevo channel capacity. Explicit JDR designs proposed so far employ the Hadamard or Fourier transform to perform a phase-to-intensity translation of the information encoding, effectively falling in the class of on-off-keying (OOK) modulation techniques; they improve over classical decoders but fall short of the Holevo capacity, particularly at large signal mean photon number $n\gtrsim1$ . Here we introduce new families of decoders based on multi-pulse and multi-level codes. We compute the rate of these codes exactly, and provide a comprehensive study of their performance. We show that multi-pulse codes can approach the rate of OOK closely, providing a simplified design for quantum-enhanced communication in the photon-starved regime; furthermore, multi-level codes can approach generalized-OOK strategies with multiple pulse types, thus they can be employed in the larger photon-number regime. |
| format | Article |
| id | doaj-art-834895a3351244cea9a75a3097607266 |
| institution | Kabale University |
| issn | 1367-2630 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj-art-834895a3351244cea9a75a30976072662025-01-21T12:35:42ZengIOP PublishingNew Journal of Physics1367-26302025-01-0127101301010.1088/1367-2630/ada4d0Multi-pulse Fourier codes for bit transmission at the quantum limitMatteo Rosati0https://orcid.org/0000-0002-8972-2936Dipartimento di Ingegneria Civile, Informatica e delle Tecnologie Aeronautiche, Universitá Roma Tre , Via Vito Volterra 62, I-00146 Rome, ItalyBit-transmission can be enhanced by the use of quantum detection techniques, realizing a joint-detection receiver (JDR) that is able to decode transmitted signals via a collective operation and achieve the Holevo channel capacity. Explicit JDR designs proposed so far employ the Hadamard or Fourier transform to perform a phase-to-intensity translation of the information encoding, effectively falling in the class of on-off-keying (OOK) modulation techniques; they improve over classical decoders but fall short of the Holevo capacity, particularly at large signal mean photon number $n\gtrsim1$ . Here we introduce new families of decoders based on multi-pulse and multi-level codes. We compute the rate of these codes exactly, and provide a comprehensive study of their performance. We show that multi-pulse codes can approach the rate of OOK closely, providing a simplified design for quantum-enhanced communication in the photon-starved regime; furthermore, multi-level codes can approach generalized-OOK strategies with multiple pulse types, thus they can be employed in the larger photon-number regime.https://doi.org/10.1088/1367-2630/ada4d0quantum communicationoptical communicationjoint-detection-receiverquantum advantagequantum information processing |
| spellingShingle | Matteo Rosati Multi-pulse Fourier codes for bit transmission at the quantum limit New Journal of Physics quantum communication optical communication joint-detection-receiver quantum advantage quantum information processing |
| title | Multi-pulse Fourier codes for bit transmission at the quantum limit |
| title_full | Multi-pulse Fourier codes for bit transmission at the quantum limit |
| title_fullStr | Multi-pulse Fourier codes for bit transmission at the quantum limit |
| title_full_unstemmed | Multi-pulse Fourier codes for bit transmission at the quantum limit |
| title_short | Multi-pulse Fourier codes for bit transmission at the quantum limit |
| title_sort | multi pulse fourier codes for bit transmission at the quantum limit |
| topic | quantum communication optical communication joint-detection-receiver quantum advantage quantum information processing |
| url | https://doi.org/10.1088/1367-2630/ada4d0 |
| work_keys_str_mv | AT matteorosati multipulsefouriercodesforbittransmissionatthequantumlimit |