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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 1:53 |
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Conference: Bucharest University Faculty of Physics 2001 Meeting
Section: Optics and Spectroscopy
Title:
ENTANGLED STATES IN QUANTUM OPTICS AND THEIR APPLICATIONS
Authors:
Gh. Ilie
Affiliation:
University of Bucharest, Faculty of Physics
Optics, Spectroscopy, Plasma and Lasers Department
E-mail
Keywords:
Abstract:
Technological progress achieved in experimental physics in the last twenty years has enabled researchers to perform sensible experiments that test the foundations of quantum physics and its interpretations.
The experimental results on wave-particle duality of light, performed by sensitive interferometry with single photons evidenced the key roll played by a peculiar but fundamental feature of quantum physics - the quantum entanglement.
Quantum entanglement could be used to circumvent the limitations imposed by Heisenberg`s uncertainty principle without violating it and to achieve previously inconceivable feats such as quantum states teleportation, experimentally performed for photons over large distances.
Some technological improvements were accomplished utilizing entangled light. Among the most sensational are the detection without interaction (free-interaction imaging) and the resolution enhancement (surpassing the classical limit) in lithography.
Using non-Boolean unitary operations with entangled states and exploiting the quantum superposition principle embedded in them one generate the core of a new research field - the quantum computation. A quantum computer could work on a superposition of many different inputs at once and could achieve greater computational power than any conventional computer. Quantum cryptography and quantum error correction codes were also devised, altogether constituting the dawn of a new era in computation.
The work presents in an accessible form, centered on some particular entangled states of light, all of the above mentioned phenomena.
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