Subject » BMEVIHIMA25
Quantum Communication Networks
Kvantumhálózatok
A tantárgyleírás hatályossága
Hatályosság kezdete:
2026. March 21.
Hatályosság vége:
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| Subject name (Hungarian, English) |
Kvantumhálózatok
Quantum Communication Networks
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| Subject code | BMEVIHIMA25 | ||||||||||||
| Subject type | — | ||||||||||||
| Training Level | — | ||||||||||||
| Course types and hours (weekly/semester) |
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| Assessment type | vizsga | ||||||||||||
| Credits | 5 | ||||||||||||
| Subject coordinator |
DR. Bacsárdi László
position: egyetemi docens
contact:
bacsardi.laszlo@vik.bme.hu
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| Responsible department |
Hálózati Rendszerek és Szolgáltatások Tanszék
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| Faculty | Villamosmérnöki és Informatikai Kar | ||||||||||||
| Subject website | — | ||||||||||||
| Primary curriculum type | — | ||||||||||||
| Direct prerequisites – Strong prerequisite | none | ||||||||||||
| Direct prerequisites – Weak prerequisite | none | ||||||||||||
| Direct prerequisites – Parallel prerequisite | none | ||||||||||||
| Direct prerequisites – Milestone prerequisite | none | ||||||||||||
| Direct prerequisites – Exclusion | none |
Objectives
Programme
Detailed descriptions of lectures
1. Operating model of quantum communication networks, application areas.
2. Basic concepts of quantum information theory. Density matrix notation in quantum information science. Postulates with density matrix. Pure and mixed states.
3. Simple quantum communication protocols: teleportation, superdense compression.
4. Basic protocols for quantum key distribution. Prepare-and-measure and entanglement-based QKD
5. Above the physical layer of QKD: information reconcelation and privacy amplification
6. Design issues for long-range quantum key distribution systems. ETSI QKD standards.
7. Concepts of quantum entropy, conditional quantum entropy, mutual quantum information, quantum-relative entropy function, analogy with classical systems. Description and characterization of quantum channels. Fundamental quantum channels. Classical and quantum capacitance definitions. Holevo theorem. Definition of capacitances for typical quantum channels.
8. Error correction of quantum channels, related information theoretic constraints. Overview of error correcting encodings, efficiency, discussion of physical implementations.
9. Quantum Internet architecture and protocols
10. The principle of quantum repeaters and their applications in telecommunication systems. Physical architecture of quantum memory and quantum repeaters
11. Convergence sharing protocol and its applications. Communication on zero capacity channel, superactivation
12. Technological challenges of optical fiber quantum communication systems
13. Technological challenges of outdoor and satellite quantum communication systems
14. Summary of the semester. Outlook: market and future of quantum networks
Detailed topics of the exercises/lab
1. Application of a density matrix notation system.
2. Quantum key distribution network design in practice.
3. Prepare-and-measure quantum key distribution in practice.
4. Entanglement-based quantum key distribution in practice.
5. Quantum Internet protocols.
6. Entanglement sharing through examples.
7. Next generation quantum key distribution architectures.
1. Operating model of quantum communication networks, application areas.
2. Basic concepts of quantum information theory. Density matrix notation in quantum information science. Postulates with density matrix. Pure and mixed states.
3. Simple quantum communication protocols: teleportation, superdense compression.
4. Basic protocols for quantum key distribution. Prepare-and-measure and entanglement-based QKD
5. Above the physical layer of QKD: information reconcelation and privacy amplification
6. Design issues for long-range quantum key distribution systems. ETSI QKD standards.
7. Concepts of quantum entropy, conditional quantum entropy, mutual quantum information, quantum-relative entropy function, analogy with classical systems. Description and characterization of quantum channels. Fundamental quantum channels. Classical and quantum capacitance definitions. Holevo theorem. Definition of capacitances for typical quantum channels.
8. Error correction of quantum channels, related information theoretic constraints. Overview of error correcting encodings, efficiency, discussion of physical implementations.
9. Quantum Internet architecture and protocols
10. The principle of quantum repeaters and their applications in telecommunication systems. Physical architecture of quantum memory and quantum repeaters
11. Convergence sharing protocol and its applications. Communication on zero capacity channel, superactivation
12. Technological challenges of optical fiber quantum communication systems
13. Technological challenges of outdoor and satellite quantum communication systems
14. Summary of the semester. Outlook: market and future of quantum networks
Detailed topics of the exercises/lab
1. Application of a density matrix notation system.
2. Quantum key distribution network design in practice.
3. Prepare-and-measure quantum key distribution in practice.
4. Entanglement-based quantum key distribution in practice.
5. Quantum Internet protocols.
6. Entanglement sharing through examples.
7. Next generation quantum key distribution architectures.
The objective of the course is to provide students with knowledge of quantum communication. The aim of the course is to explain the fundamentals of quantum communication networks and to explain the importance of quantum communication and the diversity of its applications. Following an introduction to the basic concepts of related quantum information theory, the course will provide a thorough overview of quantum communication networks, covering both quantum key distribution (QKD) networks and the so-called ‘beyond QKD’ solutions that are the basis of the future quantum Internet.
Learning outcomes
Ez a tantárgy a KKK rendeletben meghatározott, következő kompetenciák fejlesztését szolgálja:
Knowledge
No learning outcomes recorded.
Skills
No learning outcomes recorded.
Attitudes
No learning outcomes recorded.
Autonomy and responsibility
No learning outcomes recorded.
Oktatási módszertan
Lecture. Successful completion of the subject and the interdependence of knowledge require to continuous follow the content of the lectures.
Practice: review of lecture material, supplemented by practical examples
Tanulástámogató anyagok
Online források
1. S. Imre, L. Gyöngyösi: Advanced Quantum Communications - An Engineering Approach, Publisher: Wiley-IEEE Press (New Jersey, USA), John Wiley & Sons, Inc., 2012; Additional Hungarian and English language resources are available in electronic form.
Recommended preliminary knowledge for completing the subject
Knowledge type competencies
(azon előzetes ismeretek összessége, amelyek megléte nem kötelező, de a tantárgy eredményes teljesítését nagyban elősegíti)
probability, linear algebra
Skill type competencies
(azon előzetes képességek és készségek összessége, amelyek megléte nem kötelező, de a tantárgy eredményes teljesítését nagyban elősegíti)
nincs
Recommended (non-compulsory) preliminary competencies
(azon ajánlott (nem kötelező) előzetesen megszerzendő kompetenciák összessége, amelyek jelentősen hozzájárulnak a tantárgy eredményes teljesítéséhez)
probability, linear algebra
General rules
Requirements:
During the semester, students write 1 mid-term exam and 2 small homework assignments. The criteria for the successful semester: minimum of 40% of the score of the mid-term exam AND minimum of 40% of the total score of the two small assignments.
Oral exam
Additional possibilities:
Students will be given the opportunity to retake the mid-term exam during the retake week.
Late submission of the two small homework assignments is possible until the fourth day of the retake week for a special fee.
Assessment methods
In-term assessments
No detailed assessments provided.
Weight of in-term assessments
No weights provided.
Exam-period assessments
No detailed assessments provided.
Weight of exam elements
No weights provided.
Grade calculation
No grade thresholds provided.
Attendance requirements
No attendance requirements provided.
Rules for retake and resubmission
Not provided.
Short description
Not provided.
Detailed description
Not provided.
Recommended courses
Not provided.
Workload to complete the subject
No workload breakdown provided.
Validity of subject requirements
Requirements valid from:
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Requirements valid until:
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Curriculum placement
No curriculum placements recorded for this subject version.