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The role of asymmetry on the evolution of prebiotic homochirality is investigated in the context of autocatalytic polymerization reaction networks. A model featuring enantiometric cross-inhibition and chiral bias is used to study the…

天体物理学 · 物理学 2009-11-11 Marcelo Gleiser

Processes that can produce states of broken chiral symmetry are of particular interest to physics, chemistry and biology. Chiral symmetry breaking during crystallization of sodium chlorate occurs via the production of secondary crystals of…

其他凝聚态物理 · 物理学 2009-11-10 Cristobal Viedma

Taking into account pseudoscalar as well as scalar condensates, we reexamine the chiral restoration path on the chiral manifold. We shall see both condensates coherently produce a density wave at a certain density, which delays chiral…

高能物理 - 唯象学 · 物理学 2009-11-11 T. Tatsumi , E. Nakano

We present a differential rate equation model of chiral polymerization based on a simple copolymerization scheme in which the enantiomers are added to, or removed from, the homochiral or heterochiral chains (reversible stepwise isodesmic…

定量方法 · 定量生物学 2017-08-23 Celia Blanco , David Hochberg

A material with symmetry breaking inside can transmit the symmetry breaking to its vicinity by vacuum electromagnetic fluctuations. Here, we show that vacuum quantum fluctuations proximate to a parity-symmetry-broken material can induce a…

量子物理 · 物理学 2023-12-01 Yanzhe Ke , Zhigang Song , Qing-Dong Jiang

We implement a stacking strategy in designing chiral metasurfaces with high rotational symmetry, enabling quasi-bound-in-the-continuum (quasi-BIC) resonances characterized by absolute chirality. The rotational symmetry allows a circularly…

光学 · 物理学 2024-07-30 Dmitrii Gromyko , Jun Siang Loh , Jiangang Feng , Cheng-Wei Qiu , Lin Wu

Chirality is at the origin of life and is ubiquitous in nature. An object is deemed chiral if it is non-superimposable with its own mirror image. This relates to how circularly polarized light interacts with such object, a circular…

Molecular chirality is inherent to biology and cellular chemistry. In this report, the origin of enantiomeric selectivity is analyzed from the viewpoint of the "RNA World" model, based on the autocatalytic self-replication of glyceraldehyde…

化学物理 · 物理学 2021-10-26 J. A. Cowan , R. J. Furnstahl

Experimental mechanisms that yield the growth of homochiral copolymers over their heterochiral counterparts have been advocated by Lahav and co-workers. These chiral amplification mechanisms proceed through racemic {\beta}-sheet-controlled…

定量方法 · 定量生物学 2012-12-19 Celia Blanco , David Hochberg

Theoretical models and rate equations relevant to the Soai reaction are reviewed. It is found that in a production of chiral molecules from an achiral substrate autocatalytic processes can induce either enantiomeric excess (ee)…

统计力学 · 物理学 2007-05-23 Yukio Saito , Hiroyuki Hyuga

Most animal body plans have some degree of left-right asymmetry. This chirality at the tissue and organ level is often assumed to originate from the intrinsic handedness of biological molecules. How this handedness might be transferred from…

组织与器官 · 定量生物学 2017-08-30 Jeremy Hadidjojo , David K. Lubensky

Homogenization of metamaterials is a crucial issue as it allows to describe their optical response in terms of effective wave parameters as e.g. propagation constants. In this paper we consider the possible homogenization of chiral…

We revisit the causal backreaction paradigm, in which the need for Dark Energy is eliminated via the generation of an apparent cosmic acceleration from the causal flow of inhomogeneity information coming in towards each observer from…

宇宙学与河外天体物理 · 物理学 2013-10-23 Brett Bochner

The differences between uni-directional and bi-directional polymerization are considered. The uni-directional case is discussed in the framework of the RNA world. Similar to earlier models of this type, where polymerization was assumed to…

生物大分子 · 定量生物学 2007-05-23 M. Nilsson , A. Brandenburg , A. C. Andersen , S. Hoefner

Chirality is probably the most mysterious among all symmetry transformations. Very readily broken in biological systems, it is practically absent in naturally occurring inorganic materials and is very challenging to create artificially.…

Chirality is a ubiquitous phenomenon in the natural world. Many biomolecules without inversion symmetry such as amino acids and sugars are chiral molecules. Measuring and controlling molecular chirality at a high precision down to the…

Separation of the two mirror images of a chiral molecule, the enantiomers, is a historically complicated problem of major relevance for biological systems. Since chiral molecules are optically active, it has been speculated that strong…

化学物理 · 物理学 2024-10-23 Rosario R. Riso , Matteo Castagnola , Enrico Ronca , Henrik Koch

We consider the non-equilibrium physics induced by joining together two tight binding fermionic chains to form a single chain. Before being joined, each chain is in a many-fermion ground state. The fillings (densities) in the two chains…

统计力学 · 物理学 2016-09-29 Jacopo Viti , Jean-Marie Stéphan , Jérôme Dubail , Masudul Haque

Spinner mixtures consisting of both clockwise and counterclockwise self-spinning particles are often expected to phase separate. However, we demonstrate that such a demixing is absent for dimer (or rod-like) spinners. These particles always…

软凝聚态物质 · 物理学 2025-04-25 Rui Liu , Mingcheng Yang , Ke Chen

We show that a quantum subsystem can become significantly entangled with a classical background through a process with little or none semi-classical back-reactions. We study two quantum harmonic oscillators coupled to each other in a…

高能物理 - 理论 · 物理学 2017-07-19 I-Sheng Yang