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A fundamental notion of quantum mechanics is complementarity which expresses the fact that any quantum system has at least two properties that cannot simultaneously be known. One of these complementary property pairs, and perhaps the historically most important, is the wave-particle duality. A quantum system has both particle-like and wave-like properties.… (More)

We have experimentally demonstrated a realization of the two-mode relative phase operator introduced by Luis and Sánchez-Soto (Luis A and Sánchez-Soto L L 1993 Phys. Rev. A 48 4702). The relative phase distribution function was measured for a weakly excited relative phase eigenstate and weakly excited two-mode coherent states. The experiment is also (using… (More)

- A. P. Trifonov, Yu. E. Korchagin
- Probl. Inf. Transm.
- 2001

- A. P. Trifonov, A. V. Zakharov, E. V. Pronyaev
- Probl. Inf. Transm.
- 2002

- A. P. Trifonov, Yu. E. Korchagin
- Probl. Inf. Transm.
- 2009

- A P TRIFONOV
- Ortopediia travmatologiia i protezirovanie
- 1964

- Alejandra Valencia, Maria V Chekhova, Alexei Trifonov, Yanhua Shih
- Physical review letters
- 2002

We report an experimental study of group-velocity dispersion effect on an entangled two-photon wave packet, generated via spontaneous parametric down-conversion and propagating through a dispersive medium. Even in the case of using cw laser beam for pump, the biphoton wave packet and the second-order correlation function spread significantly. The study and… (More)

- A Trifonov, G Björk, J Söderholm
- Physical review letters
- 2001

We have made the first experimental demonstration of the simultaneous minimum uncertainty product between two complementary observables for a two-state system (a qubit). A partially entangled two-photon state, where each of the photons carries (partial) information of the initial state, was used to perform such a measurement.

- A P TRIFONOV
- Ortopediia travmatologiia i protezirovanie
- 1963

- Alexei Trifonov, Anton Zavriyev, Darius Subacius, Romain Alléaume, Jean-François Roch
- 2004

We report our recent results in development of the secure fiber-optics communication system based upon quantum key distribution. Emphasize is made on the limitation imposed by the state-of-the-art components crucial for the system performance. We discuss the problem of the interferometer design and highlight the possible security loopholes known. Together… (More)