QUACS RTN

First Meeting

17-18 August 2002, KTH Stockholm



Second Annual Meeting

5-7 September 2003, Erwin Schrödinger Institute, Vienna.

Contributions from the meeting speakers are available on the meeting-website
(click on the title of the desired talk in the meeting program).

"Meeting Review" by Aris C. Dreismann and Markus Arndt.

Scientific Programme:

 

Jakob Yngvason, Gershon Kurizki, Anton Zeilinger: opening remarks

Wojciech Zurek, Los Alamos: "Environment - Assisted Invariance, Ignorance, and Information in Quantum Physics"

Gershon Kurizki, Weizmann: "Controlled entanglement of complex systems"

Vladimir M. Akulin & Pierre Pillet, Orsay: "Control and Coherence Protection in Quantum Systems: an Example of Rydberg Atoms"

Ruth Garcia Fernandez, Kaiserslautern: "Creation and Measurement of a Coherent superposition of Quantum States"
Michael Fleischhauer,
Kaiserslautern: "Quasi-decoherence free subspaces in quantum memories for photons: suppressing decoherence using collective excitations"

 

CClausClaus Kiefer, Köln: "Decoherence - Concepts and Examples" ,

FerdiFerdinand Schmidt-Kaler, Innsbruck: Quantum gates and entanglement

M    Markus Arndt, Vienna: "Quantum interference and decoherence of complex molecules"

S     Stig Stenholm, Stockholm: "Time reversal in dynamic quantum systems"

Erik BErik B. Karlsson, Uppsala:  "Quantum coherence and decoherence seen in ultrafast neutron scattering experiments on protons in condensed matter"

C.Aris Chatzidimitriou-Dreismann, Berlin: "Entanglement and decoherence of protons in condensed matter - Sub-femtosecond neutron scattering results and theoretical considerations"

Round table discussion: "Coherence and Entanglement of
complex systems: bold dreams and realistic goals",
Moderation: Gershon Kurizki, Anton Zeilinger

 

Jean-Michel Raimond, Paris: "Atom/mesoscopic field entanglement: a new insight into Rabi oscillation"  

Christoph Simon, Santa Barbara: "Towards Quantum Superpositions of a Mirror"

Antonio Barone,Naples: "More on the Josephson Effect as a probe of the order parameter symmetry"

Miriam Blaauboer, Delft: "QUACS at Delft : from August 2002 to today and beyond"

closing remarks, Gershon Kurizki




    3rd Network Meeting and Research Workshop

"Decoherence, Entanglement and
Information Protection in Complex Quantum Systems (DEICS)"
25-30 April 2004, Les Houches, France.

Details available on the Orsay QUACS website


Scientific Programme:

 

     Quantum information and dynamics

S. Braunstein

Entanglement in Quantum Information Processing

V. Buzek

Quantum infodynamics

D. Shepelyansky

Quantum computation of complex dynamics in presence of imperfections

Y. Ozhigov

One qubit control and fermionic quantum computations

      Multiparticle / multiphoton entanglement

S. Haroche

Atom-mesoscopic field entanglement

E. Polzik

Stored distant entanglement and quantum secret sharing

T. Opatrny

Compatibility of perfect fringe visibility and which-path information in particle interferometry

P. Walther

Recent results in four-photon entanglement experiments

            Information protection from decoherence

D. Esteve

Quantum bit superconducting circuits

L. Childress and M. Lukin

Towards quantum control of light using atomic ensembles

E. Brion

Universal coherence loss protection by ZENO effect

  Decay / decoherence control

L. Ioffe

Decoherence and Topological Protection

S. Stenholm

Master equations with and without memory

A. Kofman

Dynamical control of decay and decoherence

S. Pellegrin

Decoherence protection and quantum logic gates in photonics band-gap structures

  Multiatom coherence / entanglement

N. Davidson

Cold atoms that interact: from Bose-Einstein condensation to atom-optical billiards

D. O'Dell

correlations in a laser-illuminated BEC

  Molecular coherence / entanglement

A. Dykhne

Broken Symmetry and Coherence of Molecular Vibrations in tunnel transitions

M. Arndt

Experimental methods for the exploration of the quantum classical boundary

R. Fernandez(S)

Characterization of molecules using Autler-Townes effect

 Coherence / entanglement in quantum ensembles

T. Gallagher

Excitation dynamics in Rydberg gases

P. Pillet

Coherence and Decoherence in Rydberg gases

Y. Malakyan

Selective addressing of high-order atomic coherence

  Proton entanglement / decoherence

E. Karlsson

Quantum coherence of protons in condensed matter

A. Dreismann

Attosecond entanglement in condensed matter studied by Compton scattering of neutrons and electrons from protons: Experiments and Theory

Spring

I. Mazets

Entanglement and decoherence in cold condensed media

 Photon - photon entanglement

D. Petrosyan

Photon-photon coupling in EIT media

M. Fleischhauer

Decoherence suppression in quantum memories based on collective many-particle states

G. Kryuchkyan

Strong entanglement of bright light beams in controlled quantum systems

     Panel discussion

  Mesoscopic coherence / entanglement in solids

E. Sarnelli

Investigation of high-temperature grain boundary junctions as a tool for superconducting qubit

A. Rudavets

Echo of  superconductivity and superfluidity

M. Blaauboer

Entanglement in double quantum dot structures





4th Network Meeting and International School

"Quantum Entanglement, Decoherence, Information, and
Geometrical Phases in Complex Systems"


1-12 November 2004
Abdus Salam International Center for Theoretical Physics (ICTP),Trieste, Italy.


Details and registration before the 2nd of June on the website of the ICTP.


Scientific Programme:

Session 1:

 Opening Lecture - 1h10' Sir M.V. Berry University of Bristol, UK


 
Session 2: Quantum information and entanglement (I)

Entropy / information bounds and gravitation - 1h10' J. D. Bekenstein

The Hebrew Univ.of Jerusalem, Israel

Role of entropy in dynamical systems - 1h10'     S. Stenholm

Royal Inst. of Tech.,Stockholm, Sweden

Quantum information and entanglement - 1h10'     S. Braunstein University of York, UK

 Discussion - 40'  

 
Session 3: Quantum measurements, entanglement and coherence (I) 

 What is really there in the quantum domain - 1h10'     Y. Aharonov Tel-Aviv University, Israel

The quantum eraser - 1h10'    M. O. Scully Texas A&M University, USA

Multiparticle entanglement - 1h10'     G. S. Agarwal Oklahoma State Univ., USA

Controlled dephasing in mesoscopic systems - 1h10'     M. Heiblum

Weizmann Inst. of Science, Rehovot, Israel

Multiparticle entangled states - 1h10'     I. J. Cirac

Max-Planck-Inst. für Quantenoptik, München, Germany

Directors and speakers, discussion - 40'  

 
Session 4: Decoherence, its control and prevention (I) 

 Quantum Darwinism - 1h10'     W. H. Zurek Los Alamos Nat. Laboratory, USA

Quantum-classical correspondence in perturbed chaotic systems - 1h10'    

G. Casati Univ.degli Studi dell'Insubria, Como, Italy

Unified approach to dynamical control of decoherence - 1h10'    

A. G. Kofman Weizmann Inst. of Science, Rehovot, Israel

Control over dynamics and decoherence of complex systems - 1h10'

G. Harel University of Bradford, UK

Josephson qubit: topological protection from decoherence - 1h10'    

V. Geshkenbein ETH, Zürich, Switzerland

Directors and speakers, discussion - 40'  

 
 Session 5: Poster session I   


Session 6: Quantum measurements, entanglement and coherence (II) 

Wave-particle duality and quantum erasure in atom interferometry - 1h10'    

G. Rempe Max-Planck-Inst.für Quantenoptik, München, Germany

Coherent excitation control - 1h10'   K. Bergmann Univ. Kaiserslautern, Germany

Entanglement and teleportation in the Fermi sea - 1h10'   

 C. W. J. Beenakker Univ. of Leiden, Netherlands

Shot noise and orbital entanglement in mesoscopics - 1h10'    

M. Buttiker Univ. de Genéve, Switzerland

 Stochastic Schroedinger equations - 1h10'     H. J. Carmichael

University of Auckland, New Zealand

Directors and speakers, discussion - 40'  

 

Session 7: Quantum information and geometric phases (I)  Room:  Main Building Lecture Hall

Quantum defects and topological quantum numbers - 1h10'     D. Thouless

University of Washington, USA

Berry phases, geometric dephasing and noise - 1h10'     Y. Gefen

Weizmann Inst. of Science, Rehovot, Israel

 

 Session 8: Decoherence, its control and prevention (II)   

 Josephson qubits: manipulations and decoherence - 1h10' 

G. Schön Universität Karlsruhe, Germany

Laser-induced dynamics and decoherence in rare earth doped crystals - 1h10'    

T. T. Basiev GPI, Moscow, Russia

Directors and speakers, discussion - 40'  


Session 9: QUACS Network: annual meeting

 
Session 10:

Directors' remarks - 15'  

 
Session 11: Quantum information and entanglement (II)   

Information as a common principle of entanglement and decoherence - 1h00'    A. Zeilinger University of Vienna, Austria

Which-path information, decoherence, dephasing in macromolecular interferometry - 1h00'    M. Arndt University of Vienna, Austria

Position and momentum entanglement - 1h00'     T. Opatrny

Palacky University, Czech Republic


Session 12: Entanglement and decoherence in complex systems (I)   

Spin coherence and computation in semiconductor nanostructures - 1h00'    

S. Das Sarma University of Maryland, USA

Entanglement and decoherence in high Tc nanostructures - 1h00'    

F. Tafuri Univ. di Napoli Federico II, Italy

Decoherence of Spin Qubits in Quantum Dots - 1h00'     D. Loss

University of Basel, Switzerland

 Directors and speakers, discussion - 35'  

 

Session 13: Decoherence, its control and prevention (III) 

Entanglement & NMR computation - 1h00'    

J. Jones University of Oxford, UK

Control of decoherence - different strategies - 1h00'     S. Pascazio

Univ. degli Studi di Bari, Italy

Dynamical control of decoherence - 1h00'     L. Viola Darmouth College, USA

Decoherence and control in Josephson nanocircuits - 1h00'    

G. Falci Università di Catania, Italy

Decoherence control by collective mapping - 1h00'     M. Fleischhauer

Universität Kaiserslautern, Germany

Spin control and relaxation in mesoscopic transport - 1h00'    

K. Richter Universität Regensburg, Germany

Directors and speakers, discussion - 35'  

 

 Session 14: Poster session II   

 

Session 15: Entanglement in complex systems (II) 

Multiparticle entanglement via boundary conditions - 1h00' lecture_notes    W. P. Schleich Universität Ulm, Germany

Many-particle adiabatic entanglement - 1h00'     R. Unanyan

Armenian Acad. of Sci., Ashtarak, Armenia

Propagation, collisions and entanglement of electron wavepackets in quantum dot arrays - 1h00'    D. Petrosyan FORTH/IESL, Crete, Greece

Collisions and entanglement in cold condensed matter - 1h00'    

I.E. Mazets A.F. IoffePhys.-Tech.Inst., St. Petersburg, Russia

 Attosecond entanglement and decoherence - 1h00'    A. C. Dreismann

TU Berlin, Germany

Quantum coherence of protons in condensed matter - 1h00'

E. B. Karlsson Uppsala University, Sweden

Directors and speakers, discussion - 35'  

 

Session 16: Quantum information and geometric phases (II) 

Quantum dynamics of geometric phases in molecular physic - 1h00' lecture_notes    H. Köppel Universität Heidelberg, Germany

Off-diagonal geometric phases - 1h00'     N. Manini Università di Milano, Italy

Geometric phases in the presence of noise - 1h00' lecture_notes   

G. M. Palma Università di Milano, Crema, Italy

Electronic transport in an array of quasi-particles in a non-abelian quantum Hall state - 1h00'     A. Stern Weizmann Inst. of Science, Rehovot, Israel

 Non-orthogonal resonances, modified geometric phase and geometric dephasing - 1h00'     R. Whitney Université de Genéve, Switzerland

 Entanglement and topological phase in two-qubit systems - 1h00'    R. Mosseri Université Paris 6, Paris, France

Directors and speakers, discussion - 35'  

 

Session 17: Entanglement in complex systems (III)  12 November 2004

 Dipole blockade in Rydberg excitation of cold atoms - 1h00'     P. Pillet CNRS, Lab. Aimé Cotton, Orsay, France

Quantum dynamics affected by repeated ancilla measurements - 1h00'    J. Clausen CNRS, Lab Aimé Cotton, Orsay, France




Future Meetings (tentative schedule)



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