1. Foreword to the special issue celebrating Kamil A. Valiev’s 75th birthday and 50-year career as a scientist, a manager, and an educator

   • A. A. Orlikovsky
   • A. A. Kokin

   Personalia Pages: 1 - 6

2. Schmidt modes and entanglement in continuous-variable quantum systems

   • A. Yu. Bogdanov
   • Yu. I. Bogdanov
   • K. A. Valiev

   OriginalPaper Pages: 7 - 20

3. Locating a photon: Position observables and an uncertainty relation

   • A. S. Holevo

   OriginalPaper Pages: 21 - 30

4. Quantum cryptography and quantum-key distribution with single photons

   • V. L. Kurochkin
   • I. I. Ryabtsev
   • I. G. Neizvestny

   OriginalPaper Pages: 31 - 36

5. Quantum teleportation with qubits

   • S. P. Kulik

   OriginalPaper Pages: 37 - 46

6. Quantum teleportation with a single-photon wave packet

   • S. N. Molotkov

   OriginalPaper Pages: 47 - 52

7. Amplitude quanta in multiparticle-system simulation

   • Y. I. Ozhigov

   OriginalPaper Pages: 53 - 65