Objective
Quantum communication schemes such as dense coding, quantum teleportation and quantum cryptography offer more efficient and more secure ways for the exchange of information in a network. In recent years, quantum communication has received much experimental attention. However, while these schemes are realizable for moderate distances (up to a few tens of kilometres in the case of quantum cryptography), serious problems occur in bringing them to technical useful scales due to the problems caused by photon los ses and decoherence in the transmission channel. Fortunately, as shown in the former references, while the use of entangled photons and of entanglement swapping could offer ways to overcome the photon losses, the decoherence can be overcome by exploiting e ntanglement purification ? a method to distil highly entangled states out of less entangled states. Therefore, quantum repeaters, a combination of entanglement swapping and entanglement purification, hold the promise to solve the problems of the photon lo sses and of the ecoherence in long-distance quantum communication. Most recently, entanglement swapping and entanglement purification have been experimentally demonstrated with high accuracy by using linear optics. However, due to the difficulty to achiev e quantum memory, the implementation of quantum repeaters remains an experimental challenge. Fortunately, a more practical scheme combining linear optics and atomic ensembles has been suggested recently, by which one can, in principle, incorporate entangle ment swapping, entanglement purification and quantum memory together into a united whole. This would thus enable a full realization of quantum repeaters. Exploiting present technologies developed in the recent experiments on multi- photon interferometry an d storage of light in atomic vapour, it will therefore be the main purpose of the present project to investigate the experimental realization of a quantum repeater with atomic ensembles and linear optics. #
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
- natural sciences computer and information sciences computer security cryptography
- natural sciences physical sciences optics
- natural sciences physical sciences theoretical physics particle physics photons
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Keywords
Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Programme(s)
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Topic(s)
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Call for proposal
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
FP6-2002-MOBILITY-5
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Funding Scheme
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Coordinator
HEIDELBERG
Germany
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.