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Highlights for Q-ESSENCE

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Format: 2024-07-16
Format: 2024-07-16
Format: 2024-07-16
Feb 14, 2011

Quantum networks reveal quantum nonlocality

The results of local measurements on some composite quantum systems cannot be reproduced classically. This impossibility, known as quantum nonlocality, represents a milestone in the foundations of quantum theory. Quantum nonlocality is also a valuable resource for information-processing tasks, for example, quantum communication, quantum key distribution, quantum state estimation or randomness extraction. Still, deciding whether a quantum state is nonlocal remains a challenging problem.

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Feb 10, 2011

Proposal for Implementing Device-Independent Quantum Key Distribution Based on a Heralded Qubit Amplifier
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Dec 27, 2010

Electric-field-induced coherent coupling of the exciton states in a single quantum dot

The signature of coherent coupling between two quantum states is an anticrossing in their energies as one is swept through the other. In single semiconductor quantum dots containing an electron–hole pair the eigenstates form a two-level system that can be used to demonstrate quantum effects in the solid state, but in all previous work these states were independent. Here we describe a technique to control the energetic splitting of these states using a vertical electric field, facilitating the observation of coherent coupling between them.

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Dec 14, 2010

Prof. Christine Silberhorn received Gottfried Wilhelm Leibniz Prize

Prof. Silberhorn leads the integrated quantum optics group in the Department of Physics.  

Congratulations!

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