3.1k citations
- University of UtahUS22 papers
- University of PortsmouthGB21 papers
- Lawrence Berkeley National LaboratoryUS18 papers
- Leibniz Institute for Astrophysics PotsdamDE18 papers
- New York UniversityUS18 papers
- Consejo Superior de Investigaciones CientíficasES17 papers
- Max Planck Institute for Extraterrestrial PhysicsDE17 papers
- Universidad Autónoma de MadridES17 papers
- Center for Astrophysics Harvard & SmithsonianUS16 papers
- University of St AndrewsGB16 papers
- Pennsylvania State UniversityUS15 papers
- The Ohio State UniversityUS14 papers
31 papers
On the relation between perspective-neutral, algebraic, and effective quantum reference frames
Julian De Vuyst, Philipp A. Hoehn, Artur Tsobanjan
The framework of internal quantum reference frames (QRFs) constitutes a universal toolset for dealing with symmetries in quantum theory and has led to new revelations in quantum gr…
An algebraic approach to the "frozen formalism" problem of time
Martin Bojowald, Artur Tsobanjan
The long-standing problem of time in canonical quantum gravity is the source of several conceptual and technical issues. Here, recent mathematical results are used to provide a con…
Algebraic properties of quantum reference frames: Does time fluctuate?
Martin Bojowald, Artur Tsobanjan
Quantum reference frames are expected to differ from classical reference frames because they have to implement typical quantum features such as fluctuations and correlations. Here,…
The Sixteenth Data Release of the Sloan Digital Sky Surveys: First Release from the APOGEE-2 Southern Survey and Full Release of eBOSS Spectra
Romina Ahumada, Carlos Allende Prieto, Andres Almeida +310
This paper documents the sixteenth data release (DR16) from the Sloan Digital Sky Surveys; the fourth and penultimate from the fourth phase (SDSS-IV). This is the first release of…
Quantization of dynamical symplectic reduction
Martin Bojowald, Artur Tsobanjan
A long-standing problem in quantum gravity and cosmology is the quantization of systems in which time evolution is generated by a constraint that must vanish on solutions. Here, an…
The Fifteenth Data Release of the Sloan Digital Sky Surveys: First Release of MaNGA Derived Quantities, Data Visualization Tools and Stellar Library
D. S. Aguado, Romina Ahumada, Andres Almeida +230
Twenty years have passed since first light for the Sloan Digital Sky Survey (SDSS). Here, we release data taken by the fourth phase of SDSS (SDSS-IV) across its first three years o…