| Course Unit Code | 440-4205/01 |
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| Number of ECTS Credits Allocated | 4 ECTS credits |
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| Type of Course Unit * | Optional |
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| Level of Course Unit * | Second Cycle |
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| Year of Study * | Second Year |
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| Semester when the Course Unit is delivered | Summer Semester |
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| Mode of Delivery | Face-to-face |
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| Language of Instruction | Czech |
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| Prerequisites and Co-Requisites | Course succeeds to compulsory courses of previous semester |
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| Name of Lecturer(s) | Personal ID | Name |
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| VAS40 | prof. RNDr. Vladimír Vašinek, CSc. |
| Summary |
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| Goal subject is acquaint students basic physical principles and experimental realizations modern quantal communications technology, specially quantal distribution keys, whose safeness is guaranteed law quantal physicists. Students themselves adopts gradually foundations coherent optical communication and obtain bases quantum opticians. These foundations then apply to description quantum distribution keys with homodynním and jednofotonovým detector. At the conclusion the students pass an excursion on experimental workplace, where they have possibility to acquaint with experimental implementation of these new communications technologies. |
| Learning Outcomes of the Course Unit |
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Understand the basic principles of quantum optical communication and their differences in comparison to fiber optical communications.
Learning outcomes are set so that the students are able to identify and apply tasks in the field of quantum communications and information processing |
| Course Contents |
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1. Classical coherent optical communications
. Amplitude and phase modulation of laser radiation
. Heterodyne and homodyne optical receiver
. Influence of transmission channel to coherent communications
. Coherent systems with usage of PSK, DPSK, ASK, FSK modulations
. Comparison of coherent and incoherent optical communications
2. Quantum states of light for communication purposes
. Quantum noise of light
. Coherent states of light and their detection
. Transmission of coherent states in communication channel
. Condensed states of light, their generation and detection
. Single photon states of light, their generation and detection
. Quantum bits and quantum continuous (analog) signals
3. Quantum communication with coherent laser radiation with homodyne detection
. Principle scheme of quantum key distribution with homodyne detector
. Calculation of security
. Robust protocols to losses, influence of electronic noise of detector, laser noises, and noises in transmission channel
. Protocols with condensed and linked states of light
. Quantum teleportation, quantum repeaters and quantum networks
. Experimental realisation
4. Quantum communication with individual photons and weak quantum states
. Principal scheme of quantum key distribution with single photon detector
. Calculation of security
. Robust protocols to losses, influence of electronic noise of detector, laser noises, and noises in transmission channel
. Protocols with linked states, test of Bell inequalities
. Quantum teleportation, quantum repeaters and quantum networks
. Experimental realisation
5. |
| Recommended or Required Reading |
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| Required Reading: |
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S. Betti, G. Demarchis, E. Innone, Coherent Optical Communications Systéme, J. Wiley & Sons, 1995.
G.P. Agrawal, Fiber-Optic Communication Systems, J. Wiley & Sons, 2002.
H.-A. Bachor, T. C. Ralph, A Guide to Experiments in Quantum Optics, J. Wiley & Sons, 2004.
E. Desurvire, Classical and Quantum Information Theory: An Introduction for the Telecom Scientist, Cambridge University Press, 2009.
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S. Betti, G. Demarchis, E. Innone, Coherent Optical Communications Systéme, J. Wiley & Sons, 1995.
G.P. Agrawal, Fiber-Optic Communication Systems, J. Wiley & Sons, 2002.
H.-A. Bachor, T. C. Ralph, A Guide to Experiments in Quantum Optics, J. Wiley & Sons, 2004.
E. Desurvire, Classical and Quantum Information Theory: An Introduction for the Telecom Scientist, Cambridge University Press, 2009.
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| Recommended Reading: |
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N.J. Cerf; G. Leuchs; E.S. Polzik, Quantum Information with Continuous Variables of Atoms and Light, Imperial College Press, 2007.
N. Gisin, G. Ribordy, W. Tittel, and H. Zbinden, Quantum cryptography, Rev. Mod. Phys. 74, 145 (2002).
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N.J. Cerf; G. Leuchs; E.S. Polzik, Quantum Information with Continuous Variables of Atoms and Light, Imperial College Press, 2007.
N. Gisin, G. Ribordy, W. Tittel, and H. Zbinden, Quantum cryptography, Rev. Mod. Phys. 74, 145 (2002).
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| Planned learning activities and teaching methods |
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| Lectures, Tutorials, Experimental work in labs |
| Assesment methods and criteria |
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| Task Title | Task Type | Maximum Number of Points
(Act. for Subtasks) | Minimum Number of Points for Task Passing |
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| Exercises evaluation and Examination | Credit and Examination | 100 (100) | 51 |
| Exercises evaluation | Credit | 44 | 20 |
| Examination | Examination | 56 | 7 |