Results 81 to 90 of about 67,287 (207)
Universal Entanglement and an Information‐Complete Quantum Theory
This Perspective summarize an informationcomplete quantum theory which describes a fully quantum world without any classical systems and concepts. Here spacetime/gravity, having to be a physical quantum system, universally entangles matter (matter fermions and their gauge fields) as an indivisible trinity, and encodes information‐complete physical ...
Zeng‐Bing Chen
wiley +1 more source
Covariant canonical quantization of fields and Bohmian mechanics
We propose a manifestly covariant canonical method of field quantization based on the classical De Donder-Weyl covariant canonical formulation of field theory.
70 +27 more
core +1 more source
Relational dynamics and Page-Wootters formalism in group field theory [PDF]
Group field theory posits that spacetime is emergent and is hence defined without any background notion of space or time; dynamical questions are formulated in relational terms, in particular using (scalar) matter degrees of freedom as time.
Andrea Calcinari, Steffen Gielen
doaj +1 more source
Synthetic Cell‐Based Artificial Stem Cell Niches for Hematopoietic Stem Cell Differentiation
Hematopoietic stem cells (HSCs) receive a combination of biochemical and biomechanical signals within the bone marrow that guide their differentiation process. These include soluble factor signaling with cytokines, cellular confinement in the stem cell niche, and contact‐dependent receptor–ligand interactions with stromal cells. Recreating this complex
Ivaylo Balabanov +7 more
wiley +1 more source
Propagating spin modes in canonical quantum gravity [PDF]
One of the main results in canonical quantum gravity is the introduction of spin network states as a basis on the space of kinematical states. To arrive at the physical state space of the theory though we need to understand the dynamics of the quantum gravitational states. To this aim we study a model in which we allow for the spins, labeling the edges
Borissov, Roumen, Gupta, Sameer
openaire +2 more sources
We study the quantum gravity corrected decoherence of quantum superpositions in the near-extremal Reissner-Nordström black holes. By employing the effective field theory approach, we model the black hole as a quantum system coupled to an external source ...
Ran Li, Zhong-Xiao Man, Jin Wang
doaj +1 more source
The Space of Connections as the Arena for (Quantum) Gravity
We review some properties of the space of connections as the natural arena for canonical (quantum) gravity, and compare to the case of the superspace of 3-metrics.
Steffen Gielen
doaj +1 more source
Abstract String theory has strong implications for cosmology, implying the absence of a cosmological constant, ruling out single‐field slow‐roll inflation, and that black holes decay. The origins of these statements are elucidated within the string‐theoretical swampland programme.
Kay Lehnert
wiley +1 more source
We give an introduction into quantum cosmology with emphasis on its conceptual parts. After a general motivation we review the formalism of canonical quantum gravity on which discussions of quantum cosmology are usually based.
Kiefer, Claus, Sandhoefer, Barbara
core +1 more source
Quantum-Wave Equation and Heisenberg Inequalities of Covariant Quantum Gravity
Key aspects of the manifestly-covariant theory of quantum gravity (Cremaschini and Tessarotto 2015–2017) are investigated. These refer, first, to the establishment of the four-scalar, manifestly-covariant evolution quantum wave equation, denoted as ...
Claudio Cremaschini, Massimo Tessarotto
doaj +1 more source

