Results 71 to 80 of about 727,743 (336)

Simplicial quantum dynamics

, 2011
Present-day quantum field theory can be regularized by a decomposition into quantum simplices. This replaces the infinite-dimensional Hilbert space by a high-dimensional spinor space and singular canonical Lie groups by regular spin groups.
Baugh J, Blatt J M, Bohm D, Bopp F, C F von Weizsaecker Komplementaritat und Logik I-II, Connes A, David Finkelstein, Dennis Marks, Dirac P A M, Feynman R P Personal communication ca, Finkelstein D, Finkelstein D, Galiautdinov A A, Gerstenhhaber M, Hestenes D, Inönü E, Kleinert H, Madore J, Mermin N D, Palev T D, Penrose R, Saller H, Saller H, Salom I, Segal I E, Selesnick S A, Shiri-Garakani, Snyder H P, Stoilova N I, Stückelberg E C G, Tavel M, Vilela Mendes R, Wess J, Yang C N   +33 more
core   +1 more source

Temperature in quantum dynamics

Atti della Accademia Peloritana dei Pericolanti : Classe di Scienze Fisiche, Matematiche e Naturali, 2009
What is the meaning of the thermodynamical temperature in quantum mechanics? What is its role in the classical limit? What can we say about the interplay between quantum and thermal fluctuations? Can we impose a constant-temperature constraint within dynamical simulations of quantum systems as we do in simulations of classical systems?
openaire   +4 more sources

Achieving Large and Anisotropic Spin‐Mediated Thermal Transport in Textured Quantum Magnets

Advanced Functional Materials, Volume 35, Issue 12, March 18, 2025.
An advanced solvent‐cast cold pressing method is developed to synthesize highly textured quantum magnets. By aligning spin chains in Ca2CuO3 perpendicular to the pressing direction, a spin‐mediated thermal conductivity of 10 ± 1 W m⁻¹ K⁻¹ is achieved, the highest reported for polycrystalline quantum materials.
Shucheng Guo, Xue Bai, Boqun Liang, Thomas Hoke, Ming Liu, Rafal E. Dunin‐Borkowski, Xi Chen   +6 more
wiley   +1 more source

The pointer basis and the feedback stabilization of quantum systems

New Journal of Physics, 2014
The dynamics for an open quantum system can be ‘unravelled’ in infinitely many ways, depending on how the environment is monitored, yielding different sorts of conditioned states, evolving stochastically.
L Li, A Chia, H M Wiseman
doaj   +1 more source

Integrable crosscaps in classical sigma models

Journal of High Energy Physics, 2023
We study the integrable boundaries and crosscaps of classical sigma models. We show that there exists a classical analog of the integrability condition and KT-relation of the boundary and crosscap states of quantum spin chains.
Tamas Gombor
doaj   +1 more source

Quantization and spacetime topology

, 2003
We consider classical and quantum dynamics of a free particle in de Sitter's space-times with different topologies to see what happens to space-time singularities of removable type in quantum theory.
Ashtekar A, Bargmann V, Bojowald M, Bojowald M, Bojowald M, Bojowald M, Eisenhart L P, Ellis G F R, Gazeau J-P, Gel'fand I M, Hawking S W, Heller M, Heller M, Isham C J, Jorjadze G, Jorjadze G, Kirillov A A, Lachièze-Rey M, Loll R, Plebanski J, Plyushchay M, Pontrjagin L, Reed M, Sally P J, Seahra S S, Senovilla J M M, Souriau J-M, Stephani H, Stone M H, Thurston W P, Thurston W P, Vilenkin N Ja, W odzimierz Piechocki, Wigner E, Wong M K F   +34 more
core   +1 more source

Antiresonance and localization in quantum dynamics [PDF]

Physical Review E, 1996
The phenomenon of quantum antiresonance (QAR), i.e., exactly periodic recurrences in quantum dynamics, is studied in a large class of nonintegrable systems, the modulated kicked rotors (MKRs). It is shown that asymptotic exponential localization generally occurs for $ $ (a scaled $\hbar$) in the infinitesimal vicinity of QAR points $ _0$.
Dana, I., Eisenberg, E., Shnerb, N.
openaire   +3 more sources

3D Printed Ultra‐Fast Plastic Scintillators Based on Perovskite‐Photocurable Polymer Composite

Advanced Functional Materials, Volume 35, Issue 12, March 18, 2025.
The demand for radiation detection is increasing in a number of fields, including high‐energy physics, medical imaging, and homeland security. This study serves to demonstrate the potential for the fabrication of fast perovskite‐based scintillators with complex shapes via stereolithographic additive manufacturing, representing a new path toward the ...
Antonella Giuri, Amal C Chekkallur, Mario Calora, Rosanna Mastria, Loris Martinazzoli, Etiennette Auffray, Sanosh Kunjalukkal Padmanabhan, Sara Carturan, Sandra Moretto, Gianluca Quarta, Lucio Calcagnile, Matteo Polo, Alberto Quaranta, Alfonso Maffezzoli, Anna Paola Caricato, Aurora Rizzo, Carola Esposito Corcione   +16 more
wiley   +1 more source

Unique Performance Considerations for Printable Organic Semiconductor and Perovskite Radiation Detectors: Toward Consensus on Best Practice Evaluation

Advanced Functional Materials, EarlyView.
A lack of standard approaches for testing and reporting the performance of metal halide perovskites and organic semiconductor radiation detectors has resulted in inconsistent interpretation of performance parameters, impeding progress in the field. This Perspective recommends key metrics and experimental details, which are suggested for reporting in ...
Jessie A. Posar, Matthew Large, Andrea Ciavatti, Laura Basiricò, Beatrice Fraboni, Paul J. Sellin, Attila J. Mozer, Marco Petasecca, Matthew J. Griffith   +8 more
wiley   +1 more source

Global versus local optimality in feedback-controlled qubit purification: new insights from minimizing Rényi entropies

New Journal of Physics, 2014
It was first shown by Jacobs, in 2003, that the process of qubit state purification by continuous measurement of one observable can be enhanced, on average, by unitary feedback control.
Colin Teo, Joshua Combes, Howard M Wiseman   +2 more
doaj   +1 more source