International Workshop on
Collective Phenomena in the Low Temperature Physics of Glasses
October 2 - 13, 2000

The following pages contain the programme of the workshop Collective Phenomena in the Low Temperature Physics of Glasses held from October 2 to October 13 at the MPIPKS Dresden.

The programme contains three regular elements

In order to promote intensive discussion, we would like to encourage participants of the workshop to prepare short comment-and-discussion contributions (of not more than 2 transparencies) in which they present their views on the subject or any of the papers presented during the day as to (i) what the main achievements or the main open questions are, (ii) for which of the open questions they see the potential for clarification through their own work or through work of others, or (iii) in which directions they would like to see work done in the field to be amended, clarified, or improved. Ample time for direct discussion is reserved also in each session.

The social programme will include (i) a welcome reception on Sunday, October 1, starting 7 p.m., (ii) an excursion to Fort Königstein on Saturday, October 7, and (iii) a conference dinner on Tuesday, October 10, starting 7.30 pm.

  Monday, 2. Oct.
morning Opening Session
9.00 - 12.30 R. Kühn (15 min): Opening
  S. Hunklinger (60 min): A bird's view
  --- break ---
  Defect Crystals
  A. Würger (60 min): Interacting TS in crystals
12:30 - 14:00 Lunch
afternoon Defect Crystals
14.00 - 16.00 R. Weis (30 min): Strongly coupled tunneling systems in defect crystals
Chair: Würger P. Nalbach (30 min): Slow relaxation in defect crystals
  M. Thesen (30 min): Six-level systems
  --- break ---
16.45 - 18.00 Discussion
  Tuesday, 3. Oct.
morning Glasses below 100 mK
9.00 - 12.30 A. Burin (60 min): Interaction induced energy delocalization and relaxation in amor-
Chair: Hunklinger phous solids at ultralow temperatures - nonlinear effects due to external alternating fields
  --- break ---
  J. Classen (60 min): Elastic properties of glasses at low temperatures
12:30 - 14:00 Lunch
afternoon Glasses below 100 mK
14.00 - 16.00 R.O. Pohl (30 min): Elastic properties of glasses and disordered crystals below 10 mK
Chair: Enss M. Klinger (30 min): External-field induced suppression phenomena in atomic
  soft-mode dynamics of glasses
  D. Rosenberg (30 min): A novel technique for measuring thermal conductivity of
  glasses below 1 K
  --- break ---
16.45 - 18.00 Discussion
  Wednesday, 4. Oct.
morning Universality and Microscopic Modeling
9.00 - 12.30 R.O. Pohl (60 min): Universality in amorphous solids and disordered crystals
Chair: Ramos --- break ---
  A. Heuer (60 min): Numerical simulation of tunneling systems
12:30 - 14:00 Lunch
afternoon Universality and Microscopic Modeling
14.00 - 16.00 W. Schirmacher (30 min): Vibrational properties of disordered solids
Chair: Horner R. Kühn (30 min): Microscopic models for low-temperature anomalies in glasses
  W. Donth (30 min): Locality of glass tunnel states in the 1K temperature range
  --- break ---
16.45 - 18.00 Discussion
  Thursday, 5. Oct.
morning From Low to High Temperatures
9.00 - 12.30 D. Parshin (60 min): Soft atomic potentials in glasses
Chair: Heuer --- break ---
  U. Buchenau (30 min): Tunneling, classical relaxation and glass transition
  M. Jäckel (30 min): Influence of high pressure on the specific heat of amorphous solids
12:30 - 14:00 Lunch
afternoon From Low to High Temperatures
14.00 - 16.00 E. Rössler (30 min): Relaxation processes in organic glasses - results from light
Chair: Buchenau scattering, dielectric spectroscopy and NMR
  M.A. Ramos (30 min): Low-temperature properties of polymorphic molecular glasses:
  soft vibrations and tunneling states
  W. Dieterich (30 min): Collective dynamics in a random dipolar system and the
  nearly constant loss response in glasses
  --- break ---
16.45 - 18.00 Discussion
  Friday, 6. Oct.
morning Metallic Glasses
9.00 - 12.30 P. Häussler (45 min): New aspects at an early stage of structure formation
Chair: G. Weiss R. König (30 min): Acoustic properties of amorphous metals at low temperatures
  --- break ---
  Dissipative Tunneling
  U. Weiss (60 min): Dissipative quantum dynamics: decoherence and tunneling
12:30 - 14:00 Lunch
afternoon Dissipative Tunneling
14.00 - 16.45 H. Grabert (30 min): Two-level systems in metals and the spin-boson model
Chair: A.Burin Mesoscopic Systems
  K. H. Ahn (30 min): The problem of dephasing in mesoscopic physics. Possible
  solutions by tunneling systems as defects
  G. Weiss (30 min): Conduction fluctuations in mesoscopic Bi wires caused by
  tunneling systems
  Yu. M. Galperin (30 min): Two-level systems in mesoscopic structures: dephasing
  and low-frequency noise
  --- break ---
17.15 - 18.45 Discussion
  Monday, 9. Oct.
morning Long-Time Relaxation
9.00 - 12.30 J. Friedrich (60 min): Spectral diffusion experiments in biological materials
Chair: Rössler --- break ---
  C. Yu (60 min): Electron glasses, window glasses, and slow relaxation
12:30 - 14:00 Lunch
afternoon Long-Time Relaxation
14.00 - 15.30 A. Gladun (30 min): Time-dependent thermal expansion of NbTi(D)
Chair: Yu S. Sahling (30 min): The maximum relaxation time of tunneling systems in glasses
  --- break ---
16.00 - 17.15 Discussion
  Tuesday, 10. Oct.
morning Magnetic Field Effects
9.00 - 11.45 P. Strehlow (60 min): Magnetic field effects in glasses
Chair: Galperin --- break ---
  M. Meißner (30 min): Low temperature specific heat of glasses
12:30 - 14:00 Lunch
afternoon Magnetic Field Effects
14.00 - 16.00 G. Weiss (30 min): Magnetic field dependence of the dielectric susceptibility
Chair: Fulde of AlBaSi-glass
  S. Kettemann (30 min): Correlated persistent tunneling currents in glasses
  A. Ovchinnikov (30 min): Three-well centers in glasses
  --- break ---
16.45 - 18.00 Discussion
  Wednesday, 11. Oct.
morning Universality and Microscopic Modeling
9.00 - 13.00 H.R. Schober (30 min): Collectivity of motion in glasses and supercooled liquids
Chair: Parshin C. Picus (30 min):
  Universality in microscopic glass models
  --- break ---
  J. Honolka (30 min): On the nature of tunneling systems in amorphous As2S3
  C. Laermans (30 min): Tunneling states in partly disordered single crystals:
  clathrates, neutron irradiated Si, and SiO2
  F. Bert (30 min): Tunneling states in mineral crystals
12:30 - 14:00 Lunch
afternoon free
  Thursday, 12. Oct.
morning Glasses below 100 mK
9.00 - 12.30 D. Rosenberg (60 min): Interactions between tunneling systems in amorphous
Chair: Polishchuk solids: an experimental overview
  --- break ---
  C. Enss (60 min): Coherent echoes in glasses
12:30 - 14:00 Lunch
afternoon Glasses below 100 mK
14.00 - 16.45 I Polishchuk (30 min): The theory of many-particle relaxation in disordered systems
Chair: Pohl H. Horner (60 min): Slow dynamics and aging in glasses and spin-glasses
  X. Liu (30 min): Evolution of tunneling states in disordered silicon by ion
  --- break ---
17.15 - 18.30 Discussion, Glasses below..
18.30 - 19.45 Discussion, Univ. and Microsc..
  Friday, 13. Oct.
morning Critical Discussion
9.00 - 12.30 and
Chair: Hunklinger Outlook
12:30 - 14:00  
afternoon Informal Discussion

Collective Phenomena