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Macroscopic tests of quantum mechanics with optomechanical resonators

Wed, 2011-06-29 21:53 - Q-Essence Coordinator
Date: 
2010-04-13
Author(s): 

Markus Aspelmeyer

Conference/Workshop/Place: 
1.HUMO Workshop, Humboldt-Universitaet zu Berlin, Germany
Format: 
Invited Talk

 Wp-3.5: Entanglement-based quantum information processing

Quantum-Opto-Mechanics: cavity-cooling and quantum entanglement of mechanical resonators

Wed, 2011-06-29 21:50 - Q-Essence Coordinator
Date: 
2010-03-30
Author(s): 

Markus Aspelmeyer

Conference/Workshop/Place: 
Cavity-Mediated Molecular Cooling (CMMC) - final meeting, Herrsching, Germany

 Wp-3.5: Entanglement-based quantum information processing

Towards Macroscopic Quantum Experiments conceptual and experimental challenges

Wed, 2011-06-29 21:45 - Q-Essence Coordinator
Date: 
2010-03-21
Author(s): 

Markus Aspelmeyer

Conference/Workshop/Place: 
Gordon Research Conferences, Galveston, Texas, USA
Link: 

http://www.grc.org/programs.aspx?year=2010&program=quantumreg

 Wp-3.5: Entanglement-based quantum information processing

Least-squares approximation by elements from matrix orbits achieved by gradient flows on compact lie groups

Wed, 2011-06-29 17:57 - Q-Essence Coordinator
Date: 
2010-12-13
Author(s): 

Chi-Kwong Li, Yiu-Tung Poon, Thomas Schulte-Herbrüggen

Reference: 

Math. Comp. 80 (2011), 1601-1621

URL: 

http://www.ams.org/journals/mcom/2011-80-275/S0025-5718-2010-02450-0/hom...

Let $ S(A)$ denote the orbit of a complex or real matrix $ A$ under a certain equivalence relation such as unitary similarity, unitary equivalence, unitary congruences etc.

Long-distance free-space quantum entanglement and fundamental experiments

Wed, 2011-06-29 17:45 - Q-Essence Coordinator
Date: 
2010-10-19
Author(s): 

Anton Zeilinger

Conference/Workshop/Place: 
UQCC2010, National Institute of Information and Communications Technology (NICT), Tokyo, Japan
Link: 

http://www.uqcc2010.org/

Format: 
Invited Talk

Wp-2.5: Quantum communication test beds

Quantum Information and Communication Technology, Basic Concepts and Techniques

Wed, 2011-06-29 17:36 - Q-Essence Coordinator
Date: 
2011-01-25
Author(s): 

Anton Zeilinger

Conference/Workshop/Place: 
Colloquium, Politecnico, Milano, Italy
Format: 
Invited Talk

Wp-2.5: Quantum communication test beds

Quantum Walks with Non-Abelian Anyons

Fri, 2011-06-17 03:57 - Gavin Brennen
Date: 
2011-06-17
Author(s): 

L. Lehman, V. Zatloukal, G.K. Brennen, J.K. Pachos, and Z. Wang

Reference: 

Phys. Rev. Lett. 106, 230404 (2011).

URL: 

http://prl.aps.org/abstract/PRL/v106/i23/e230404

We study the single particle dynamics of a mobile non-Abelian anyon hopping around many pinned anyons on a surface, by modeling it with a discrete time quantum walk. During the evolution, the spatial degree of freedom of the mobile anyon becomes entangled with the fusion degrees of freedom of the collective system. Each quantum trajectory makes a closed braid on the world lines of the particles establishing a direct connection between statistical dynamics and quantum link invariants.

Staying adiabatic with unknown energy gap

Wed, 2011-06-08 09:31 - Negretti Antonio
Date: 
2011-05-09
Author(s): 

J. Nehrkorn, S. Montangero, A. Ekert, A. Smerzi, R. Fazio, T. Calarco

Reference: 

http://lanl.arxiv.org/abs/1105.1707

We introduce an algorithm to perform an optimal adiabatic evolution that operates without an apriori knowledge of the system spectrum. By probing the system gap locally, the algorithm maximizes the evolution speed, thus minimizing the total evolution time. We test the algorithm on the Landau-Zener transition and then apply it on the quantum adiabatic computation of 3-SAT: The result is compatible with an exponential speed-up for up to twenty qubits with respect to classical algorithms. We finally study a possible algorithm improvement by combining it with the quantum Zeno effect.

Multichannel quantum-defect theory for ultracold atom-ion collisions

Wed, 2011-06-08 09:27 - Negretti Antonio
Date: 
2011-08-08
Author(s): 

Z. Idziaszek, A. Simoni, T. Calarco, P. S. Julienne

Reference: 

New Journal of Physics 13, 083005 (2011)

URL: 

http://iopscience.iop.org/1367-2630/13/8/083005

We develop an analytical model for ultracold atom-ion collisions using the multichannel quantum-defect formalism. The model is based on the analytical solutions of the r^-4 long-range potential and on the application of a frame transformation between asymptotic and molecular bases. This approach allows the description of the atom-ion interaction in the ultracold domain in terms of three parameters only: the singlet and triplet scattering lengths, assumed to be independent of the relative motion angular momentum, and the lead dispersion coefficient of the asymptotic potential.

QUIE2T input to the EC Green Paper

Fri, 2011-05-20 12:58 - Lukas Theussl
Summary: 

QUIE2T has provided a position document as a response to the EC consultation regarding a "Green Paper on a Common Strategic Framework for future EU Research and Innovation Funding".

The consultation was initiated by Horizon 2020 - the Framework Programme for Research and Innovation. The QUIE2T position paper is available from here.

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