نتایج جستجو برای: frustration

تعداد نتایج: 8906  

Journal: :Philosophical transactions. Series A, Mathematical, physical, and engineering sciences 2012
Arttu Rajantie

The existence of magnetic monopoles is predicted by many theories of particle physics beyond the standard model. However, in spite of extensive searches, there is no experimental or observational sign of them. I review the role of magnetic monopoles in quantum field theory and discuss their implications for particle physics and cosmology. I also highlight their differences and similarities with...

Journal: :Physical review letters 2013
George M Gehring Andreas C Liapis Svetlana G Lukishova Robert W Boyd

We present experimental evidence that the contribution of the Goos-Hänchen shift to tunneling delay is suppressed in frustrated total internal reflection. We use a Hong-Ou-Mandel interferometer to perform direct time measurements of reflection delays with femtosecond resolution at optical frequencies, and take advantage of a liquid-crystal-filled double-prism structure to dynamically change the...

Journal: :Physical review letters 2008
Chisa Hotta Frank Pollmann

We study a model of strongly interacting spinless fermions on an anisotropic triangular lattice. At half-filling and the limit of strong repulsive nearest-neighbor interactions, the fermions align in stripes and form an insulating state. When a particle is doped, it either follows a one-dimensional free motion along the stripes or fractionalizes perpendicular to the stripes. The two propagation...

2014
Hai-Di Liu Yao-Hua Chen Heng-Fu Lin Hong-Shuai Tao Wu-Ming Liu

The Shastry-Sutherland lattice, one of the simplest systems with geometrical frustration, which has an exact eigenstate by putting singlets on diagonal bonds, can be realized in a group of layered compounds and raises both theoretical and experimental interest. Most of the previous studies on the Shastry-Sutherland lattice are focusing on the Heisenberg model. Here we opt for the Hubbard model ...

Journal: :Biophysical journal 2016
Paulo Ricardo Mouro Vinícius de Godoi Contessoto Jorge Chahine Ronaldo Junio de Oliveira Vitor Barbanti Pereira Leite

Protein folding is a central problem in biological physics. Energetic roughness is an important aspect that controls protein-folding stability and kinetics. The roughness is associated with conflicting interactions in the protein and is also known as frustration. Recent studies indicate that an addition of a small amount of energetic frustration may enhance folding speed for certain proteins. I...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2012
Michael L Baker Grigore A Timco Stergios Piligkos Jennifer S Mathieson Hannu Mutka Floriana Tuna Piotr Kozlowski Michal Antkowiak Tatiana Guidi Tulika Gupta Harapriya Rath Robert J Woolfson Grzegorz Kamieniarz Robin G Pritchard Høgni Weihe Leroy Cronin Gopalan Rajaraman David Collison Eric J L McInnes Richard E P Winpenny

The term "frustration" in the context of magnetism was originally used by P. W. Anderson and quickly adopted for application to the description of spin glasses and later to very special lattice types, such as the kagomé. The original use of the term was to describe systems with competing antiferromagnetic interactions and is important in current condensed matter physics in areas such as the des...

Journal: :Applied nursing research : ANR 2006
Lance Patak Anna Gawlinski Ng Irene Fung Lynn Doering Jill Berg Elizabeth A Henneman

BACKGROUND Some patients receiving mechanical ventilation experience an intensified need to communicate while their ability to do so is compromised as the endotracheal tube prevents speech. Although the use of a communication board to enhance communication with such patients has been suggested, few descriptive or empirical studies have addressed the content and format of these devices or of pat...

Journal: :iranian journal of public health 0
mi yu

background: transition into parenthood is a major developmental life event and is very significant because development in infanthood is affected by the transition process of mothers parenting an infant. this study aimed to develop the assessment tool for transition process of high risk infant’s caregiver in korea. methods: the participants were 246 mothers of premature infant born with gestatio...

Journal: :Physical review letters 1996
Camacho

We solve a model that takes into account entropic barriers, frustration, and the organization of a protein-like molecule. For a chain of size M , there is an effective folding transition to an ordered structure. Without frustration, this state is reached in a time that scales as M, with λ ≃ 3. This scaling is limited by the amount of frustration which leads to the dynamical selectivity of prote...

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