Notion Of Locality Research Articles

Quantum networks theory

The formalism of quantum theory over discrete systems is extended in two significant ways. First, quantum evolutions are generalized to act over entire network configurations, so that nodes may find themselves in a quantum superposition of being connected or not, and be allowed to merge, split and reconnect coherently in a superposition. Second, tensors and traceouts are generalized, so that systems can be partitioned according to almost arbitrary logical predicates in a robust manner. The hereby presented mathematical framework is anchored on solid grounds through numerous lemmas. Indeed, one might have feared that the familiar interrelations between the notions of unitarity, complete positivity, trace-preservation, non-signalling causality, locality and localizability that are standard in quantum theory be jeopardized as the neighbourhood and partitioning between systems become both quantum, dynamical, and logical. Such interrelations in fact carry through, albeit two new notions become instrumental: consistency and comprehension.

Encounters and disencounters in becoming creative workers: motivations and experiences of postgraduate East Asian students in an elite UK university

In this paper, I examine the motivations and experiences of international postgraduate students from East Asia in a creative industries-related (digital media) master’s program in the United Kingdom/UK. Grounded on the landscape of neoliberalisation and internationalisation of Higher Education/HE in Anglophone contexts, on the emergence of the creative industries (including in HE settings), and on notions of coloniality and locality, I examine the encounters and disencounters between international students’ expectations and professional aspirations, and their experiences in a digital media degree in a highly ranked UK university. From interviews with seven former students, two main findings emerged from this study: an interest in becoming creative media workers and an articulation of different values attributed to Western/UK HE. These findings highlight encounters and disencounters between participants’ expectations and the degree, and shed light on the diversity across an apparently homogenous student body and on how different geo-onto-epistemologies (i.e. the indissociable links between localities, realities, and knowledges) around creative industries and HE mediate these students’ expectations and experiences. Such findings can be relevant to the creative industries HE community, especially to those interested in the generative pedagogical and curricular potential of (dis)encounters in international and intercultural creative industries HE settings.

Tensor networks for black hole interiors: non-isometries, quantum extremal surfaces, and wormholes

We use hyperbolic tensor networks to construct a holographic map for black hole interiors that adds a notion of locality to the non-isometric codes proposed by Akers, Engelhardt, Harlow, Penington, and Vardhan. We use tools provided by these networks to study the relationship between non-isometries and quantum extremal surfaces behind the horizon. Furthermore, we introduce a limited notion of dynamics for these interior tensor networks based on the qudit models introduced by Akers et al., and study the evolution of quantum extremal surfaces in an evaporating black hole. We also find a tensor network description of a wormhole connecting the black hole interior to the radiation, providing a mechanism for interior states and operators to be encoded in the radiation after the Page time. As a particular case, we construct a tensor network realization of the backwards-forwards maps recently proposed to incorporate non-trivial effective dynamics in dynamical constructions of these non-isometric black hole codes.

Operators in the internal space and locality

Realizations of the holographic correspondence in String/M theory typically involve spacetimes of the form AdS × Y where Y is some internal space which geometrizes an internal symmetry of the dual field theory, hereafter referred to as an “R symmetry”. It has been speculated that areas of Ryu-Takayanagi surfaces anchored on the boundary of a subregion of Y, and smeared over the base space of the dual field theory, quantify entanglement of internal degrees of freedom. A natural candidate for the corresponding operators are linear combinations of operators with definite R charge with coefficients given by the “spherical harmonics” of the internal space: this is natural when the product spaces appear as IR geometries of higher dimensional AdS spaces. We study clustering properties of such operators both for pure AdS × Y and for flow geometries, where AdS × Y arises in the IR from a different spacetime in the UV, for example higher dimensional AdS or asymptotically flat spacetime. We show, in complete generality, that the two point functions of such operators separated along the internal space obey clustering properties at scales sufficiently larger than the AdS scale. For non-compact Y, this provides a notion of approximate locality. When Y is compact, clustering happens only when the size of Y is parametrically larger than the AdS scale. This latter situation is realized in flow geometries where the product spaces arise in the IR from an asymptotically AdS geometry at UV, but not typically when they arise near black hole horizons in asymptotically flat spacetimes. We discuss the significance of this result for entanglement and comment on the role of color degrees of freedom.

Gradients of Trust in Vaccines

Abstract COVID-19 vaccination in Laos has been affected by challenges in reaching the whole population and preexisting mistrust in the health system. Vaccination rates are low among the Hmong, whose healing epistemologies are rooted in animism and Christianity, while most healthcare staff are from the lowland Buddhist majority. However, local notions of immunity and religious practices are not the main factors influencing confidence in vaccines, as these are flexible and pragmatic in incorporating different approaches to curing illness. Instead, the root causes are patterns of mistrust and inequity enacted through Hmong peoples’ experiences with health services. An innovative government-led initiative focusing on trust-building and local ownership through relational community engagement, utilizing existing village, family, ethnic, and religious structures and promoting effective communication and cultural sensitivity led to a rapid increase in vaccine uptake. Trust in vaccines is therefore not an abstract concept but highly relational, and so can be intentionally developed.

How to think about the instrumental politics of mass rape: a critical appraisal of feminist approaches

ABSTRACT Mass rape and other forms of sexual violence in ethnic conflict, as their incidence in Bosnian and Kosovo wars in former Yugoslavia showed in the 1990s, cannot be relativised along some strategy of either ‘victimization’ or ‘everyone is guilty’ within an antiquated framework of ethnic-religious hatred. In this case as in others, the local notions of honour and blood cannot be taken uncritically to be binding cultural traits that ought to determine social behaviour. Incidentally, they cannot either account for a structured ideology of ‘men’s war against women’, or for a postmodern feminist ideology of gender and the moral panic of a ‘patriarchal dream-order’ restored. In this article, I offer a critical appraisal of the stereotyped and relativising accounts of feminist and human rights scholars, a critique very much needed for an anthropological approach attentive to cultural ideology and activism. To understand the effectiveness of mass rape in a military strategy of ethnic cleansing, I suggest local cultural concepts and moral relativist ideas are not culturally given, but instrumental resources deliberately mobilised.

Localization in quantum field theory

We review the issue of localization in quantum field theory and detail the nonrelativistic limit. Three distinct localization schemes are examined: the Newton–Wigner, the algebraic quantum field theory, and the modal scheme. Among these, the algebraic quantum field theory provides a fundamental concept of localization, rooted in its axiomatic formulation. In contrast, the Newton–Wigner scheme draws inspiration from the Born interpretation, applying mainly to the nonrelativistic regime. The modal scheme, relying on the representation of single particles as positive frequency modes of the Klein–Gordon equation, is found to be incompatible with the algebraic quantum field theory localization.This review delves into the distinctive features of each scheme, offering a comparative analysis. A specific focus is placed on the property of independence between state preparations and observable measurements in spacelike separated regions. Notably, the notion of localization in algebraic quantum field theory violates this independence due to the Reeh–Schlieder theorem. Drawing parallels with the quantum teleportation protocol, it is argued that causality remains unviolated. Additionally, we consider the nonrelativistic limit of quantum field theory, revealing the emergence of the Born scheme as the fundamental concept of localization. Consequently, the nonlocality associated with the Reeh–Schlieder theorem is shown to be suppressed under nonrelativistic conditions.

Kampung Durian Pranan Agritourism Initiatives: An Analysis of Actor Dynamics

Developing agritourism is a useful strategy to enhance the value of the local agriculture industry. Agritourism utilises agricultural products and activities to attract tourists to rural areas. As an early stage of agritourism development, land conversion has become a supporter of attempts to create agritourism attractions. The notion of locality exists to distinguish and identify the tourism attraction area. This research focuses on durian agritourism in Padukuhan Pranan, Banjaroya Village, Kalibawang, Kulon Progo Regency, Special Region of Jogjakarta. Special attention is made to the dynamics of the local actors. Data collection was carried out using ethnographic methods through observation and in-depth interviews, for approximately three months (July-September 2023). The informants in this research were several actors involved in the development and management of Kampung Durian Pranan agritourism. The study discovered that converting the property to agritourism benefited Padukuhan Pranan by establishing the Kepranan durian as a symbol of local identity. With its central emphasis on the local populace, the Pranan Durian Village Festival serves as an outstanding instance of the substantial contributions made by community members. The collaborative efforts of local actors to effect positive change are exemplified through the festival’s design and execution, which are built upon their roles as initiators, motivators, and educators. However, it is worth noting that the reestablishment of a sustainable family farm as a means to regenerate agritourism’s sustainability has yet to transpire due to the continued dearth of interest among the younger generation in agritourism. Hence, agritourism planning needs to be designed by organising activities involving the younger generation and rebuilding family farms to create resilience and sustainability.

Destination Restaurants' Practices and the Production of Locality: The Case of Michelin Restaurants in China.

Dining plays a pivotal role in the travel experience, with numerous studies identifying the significant impacts of restaurant attributes on tourists' destination experiences and their sense of place. The identified attributes include the origin of food produce, menu design, the physical and social servicescape, and restaurant reputation, all of which have the potential to enhance customers' sense of place. Therefore, based on theories of the production of locality, this study explores how destination restaurants "put place on the plate" and identifies how destination restaurants promote place. Semi-structured interviews were conducted with the representatives of seventeen Michelin (one star, two stars, three stars, and Bib Gourmand)-awarded restaurants across Mainland China. The results reveal three primary strategies employed by destination restaurants in promoting place: forging partnerships with the local community to produce, present, and reproduce localities; leveraging local knowledge embedded in the local produce, recipes, cooking techniques, and local culture; and practicing translocality to introduce a regional cuisine to diverse and cosmopolitan consumers. This research provides a comprehensive understanding of the way in which notions of locality and place are used by destination restaurants and the way in which this may promote not only restaurants but also regional culinary cultures and destination attractiveness.

Quantum particle localization observables on Cauchy surfaces of Minkowski spacetime and their causal properties

We introduce and study a general notion of spatial localization on spacelike smooth Cauchy surfaces of quantum systems in Minkowski spacetime. The notion is constructed in terms of a coherent family of normalized POVMs, one for each said Cauchy surface. We prove that a family of POVMs of this type automatically satisfies a causality condition which generalizes Castrigiano’s one and implies it when restricting to flat spacelike Cauchy surfaces. As a consequence, no conflict with Hegerfeldt’s theorem arises. We furthermore prove that such families of POVMs do exist for massive Klein–Gordon particles, since some of them are extensions of already known spatial localization observables. These are constructed out of positive definite kernels or are defined in terms of the stress–energy tensor operator. Some further features of these structures are investigated, in particular the relation with the triple of Newton–Wigner selfadjoint operators and a modified form of Heisenberg inequality in the rest 3-spaces of Minkowski reference frames.

Discussions in “Cheche” magazine and modernisation in Tanzania (1967–1970)

Today,Africanists are turning their attention to the history of decolonization once again.Intellectual historians and those who study the history of concepts are no exception.The author of this article proposes to consider the discussion on the pages of the radical student magazineCheche and the birth ofUSARF(UniversityStudentAfricanRevolutionaryFront) as an important phenomenon of the intersection of “big” discourses with local vernacular ideas at the very dawn ofTanzania’s political independence (1967–1970).The two main concepts, on the intersection of which, the analyzed discussion arose, are development and modernization and the role of young intellectuals in achieving them.Tracing how these concepts developed during the colonial period, the author draws attention to how their understanding changed and developed with independence.The author then turns to the history of theUniversity ofDar esSalaam and the history of theUSARFsocialist circle, hypothesizing how local debates may have influenced the public sphere and local notions of development and modernization (maendeleo).How did the vernacular ideas influence the use of these concepts in the discussions, that happened between the members of the ogranizations.And in turn how did they influence the ideas by introducing a new concept of “underdevelopment” (maendeleo duni), which was heavily influenced by works ofWalterRodney?

Beyond Digital Protection(ism)

Abstract What values and conceptualizations of data are being advanced through new data protection regulations in Asia? This article answers this question with a comparative analysis of data protection regulations in China, India, and South Korea. The article identifies four key dimensions of divergence: conceptualizations of personal and sensitive information, cross-border data transfer restrictions, state exceptions, and considerations for platforms. This leads to three conclusions: local notions of “privacy” are animated by complex domestic priorities and geopolitics, data protection regulations contribute to platform governance, and local exceptions to data protection regulations reveal diverse political strategies to manage citizen-state relations.

Optimistic Rates: A Unifying Theory for Interpolation Learning and Regularization in Linear Regression

We study a localized notion of uniform convergence known as an “optimistic rate” [ 34 , 39 ] for linear regression with Gaussian data. Our refined analysis avoids the hidden constant and logarithmic factor in existing results, which are known to be crucial in high-dimensional settings, especially for understanding interpolation learning. As a special case, our analysis recovers the guarantee from Koehler et al. [ 21 ], which tightly characterizes the population risk of low-norm interpolators under the benign overfitting conditions. Our optimistic rate bound, though, also analyzes predictors with arbitrary training error. This allows us to recover some classical statistical guarantees for ridge and LASSO regression under random designs and helps us obtain a precise understanding of the excess risk of near-interpolators in the over-parameterized regime.

Quantum LOSR networks cannot generate graph states with high fidelity

AbstractQuantum networks lead to novel notions of locality and correlations and an important problem concerns the question of which quantum states can be experimentally prepared with a given network structure and devices and which not. We prove that all multi-qubit graph states arising from a connected graph cannot originate from any quantum network with bipartite sources, as long as feed-forward and quantum memories are not available. Moreover, the fidelity of a multi-qubit graph state and any network state cannot exceed 9/10. Similar results can also be established for a large class of multi-qudit graph states.

Local and global notions of visibility with respect to Kobayashi distance: a comparison

Local and global notions of visibility with respect to Kobayashi distance: a comparison

Psicoanálisis de guerrilla. Del psicoanálisis genérico e impuro

In dealing with the radical politicization of psychoanalysis from a geopolitical standpoint, this essay argues that psychoanalysis has to be capable to rethink and reembody itself with every contingent and immanent dislocations of its transcendental horizons. Through a reading of Slavoj Žižek and Alain Badiou on Mao Tse-Tung, we can think about the notion of dislocation and localization of the Idea. We will argue that this has historically happened in psychoanalysis in the transition from Freud to Lacan; however, the issue is that this dislocation has undergone a retroactivity of necessity which makes a vanishing mediator out of the contingent scrap of reality that it initially relied on—and this forms the quilting point of the contemporary Lacanian ideology. Through Gabriel Tupinambá›s The Desire of Psychoanalysis, we will inspect the notion of generic psychoanalysis. We will insist that while generic psychoanalysis is crucial for the refiguring of psychoanalytic politics in a dislocative matter, we need to take this outlook to the end onto a psychoanalysis that is willing to impurify itself through localization as this is the only psychoanalysis worthy of the name.

Revelatory Inebriation and Westward Projections: Bolek Polívka’s Father Figures in Mid-2000s Czech Cinema

In the mid-2000s, prominent Czech actor Bolek Polívka played palpably flawed father figures in the films Pupendo (2003) and Something Like Happiness (2005). Polívka’s patresfamilias iterate the tendencies of alcohol consumption and antiheroism common for portrayals of masculinity in Czech texts in these films, which reflect post-communist attitudes about current affairs and perspectives on the former regime. This paper applies theories pertaining to regional literature and national cinemas to explore Polívka’s peculiar roles as father figures responding to local social codes and notions about the West. The analysis assesses Polívka’s select patresfamilias against characters from his prior films as well as familiar figures in the Czech cultural canon, e.g. Josef Švejk. The discussion also proposes an understanding of alcohol use in Pupendo and Something Like Happiness as a narrative device that brings about instances of intimacy and revelation. Polívka’s acting engenders moments of truth that clarify his characters’ stances and align them with narrative developments of both films. In accordance with concentrating on the actor, this paper accounts for the complexity that Polívka’s off-screen persona and local success add to his characters.

Ahmad Bey's 1846 Istiftāʾ: Its Dual Legislative Framework and Religio-Political Context

AbstractOn April 26, 1846, Ahmad Bey signed a historic emancipation decree making the Regency of Tunis the first in the modern Islamic world to formally abolish the longstanding institution of slavery. While the decree marked the first of such unprecedented measures, attracting a barrage of compliments from anti-slavery societies around the globe, it conflicted with the local notions of enslaving practices and thus prompted an earnest process of legitimation for the formal abolition of slavery before the Majlis al Shari (Sharia Council for Judicial Ordinance), without which abolition would have remained culturally and politically contentious. The paper will assess the socio-cultural context and the plural Islamic legal framework that informed both Ahmad Bey's argument favoring abolition and the divergent responses and attitudes of the religious establishment toward the abolition decree.

Speed limits and locality in many-body quantum dynamics.

We review the mathematical speed limits on quantum information processing in many-body systems. After the proof of the Lieb-Robinson Theorem in 1972, the past two decades have seen substantial developments in its application to other questions, such as the simulatability of quantum systems on classical or quantum computers, the generation of entanglement, and even the properties of ground states of gapped systems. Moreover, Lieb-Robinson bounds have been extended in non-trivial ways, to demonstrate speed limits in systems with power-law interactions or interacting bosons, and even to prove notions of locality that arise in cartoon models for quantum gravity with all-to-all interactions. We overview the progress which has occurred, highlight the most promising results and techniques, and discuss some central outstanding questions which remain open. To help bring newcomers to the field up to speed, we provide self-contained proofs of the field's most essential results.

On the stability of a time‐varying single‐species harvesting model with Allee effect

This work brings a one‐dimensional logistic harvesting model with Allee effect to the time‐varying framework. This new framework is more sober than the autonomous version of the system because it, the framework, permits all environment‐dependent coefficients to depend on time. Based on these coefficients, we derive sets of conditions that drive population to “mathematical” extinction. More precisely, we investigate various local and global stability notions including uniform stability, attractivity, asymptotic stability, and the uniform exponential stability.