Unitary Process Research Articles

Don’t Pass Them By: Figuring the Sacred in Organizational Values Work

How and why could some stories be construed as sacred in organizations, and what functions does the sacred have in organizational values work? Research has shown how values can be made formative of a range of organizational purposes and forms but has underscored their performative, situated, and agentic nature. We address that void by studying the sacred as a potentially salient yet under-researched realm of values work. Drawing on an ethnographic case study of a faith-based health care organization and the ethical philosophy of Paul Ricoeur, we describe how the sacred is figured in two sets of tales that were lived and told with surprising intensity and consistency: the parable of the Good Samaritan and the tale of the legacy bestowed by the organization’s founder. We theorize how this figuring of the sacred in story and in action recasts values work from a centralized and unitary process to a two-way learning dialectic between the ongoing creative imitation of action and narrative. Values in the shape of stories of the sacred do not achieve their meaning as unchangeable cores or sanctioned beliefs. Rather, they come to life in a process of ongoing moral inquiry that co-evolves with moral agencies. In the latter regard, the sacred primarily becomes manifest in everyday work in the form of questioning and creative acts of care. People become moral agents when they feel and respond to the sacred in the call of the other.

Construction of a Polarization Multiphoton Controlled One‐Photon Unitary Gate Assisted by the Spatial and Temporal Degrees of Freedom

AbstractIn order to fulfill quantum information processing tasks such as quantum computation and scalable quantum networks, quantum logic gates are indispensable parts. A multiqubit logic gate can efficiently reduce the cost of physical resources and complicated operations that are necessary in the combination of fewer‐qubit (e.g., two‐qubit) logic gates to fulfill the same tasks. However, the construction of multiphoton quantum logic gates is a large challenge. Assisted by spatial and temporal degrees of freedom, a polarization multiphoton controlled one‐photon unitary gate is proposed, which can be realized with three processes including the control‐path process based on weak cross‐Kerr nonlinearities, the unitary transformation process, and the output process. In the control‐path process, the control‐path modules are applied, where the entanglement between polarization, spatial and temporal degrees of freedom is generated by beam splitters, time delayers, and nonlinear interaction in cross‐Kerr media. The scheme presented here, assisted by spatial and temporal degrees of freedom reduces the experimental complexity of the schemes assisted by only spatial degree of freedom. Moreover, it will also be a useful reference in optimally constructing multiqubit quantum logic gates with other multiple degrees of freedom in many physical systems.

How contractual terms determine fiduciary duties: a two-stage process

The determination of the scope of the fiduciary duty of loyalty, when created by contract, is not a unitary process. It is raised following a multi-factorial enquiry, which considers the nature of the engagement, in a first stage. Here, no single factor is conclusive. It is then, in a separate, second stage, reduced by qualifying contractual terms, which are applied almost strictly logically. This second stage uses the contractual doctrines of interpretation and implication. However, since it is a form of the fiduciary doctrine of authorisation, those contractual doctrines are modified according to fiduciary principles. We argue this follows from the underlying nature of the fiduciary obligation as a way of resolving its internal tensions. While this division has not yet been fully recognised in the cases, the courts have been inching towards it. However, not fully recognising this inevitable division and eliding the two stages has led to defective reasoning and outcomes.

Dissipative Charging of a Quantum Battery.

We show that a cyclic unitary process can extract work from the thermodynamic equilibrium state of an engineered quantum dissipative process. Systems in the equilibrium states of these processes serve as batteries, storing energy. The dissipative process that brings the battery to the active equilibrium state is driven by an agent that couples the battery to thermal systems. The second law of thermodynamics imposes a work cost for the process; however, no work is needed to keep the battery in that charged state. We consider simple examples of these batteries and discuss situations in which the charged state has full population inversion, in which case the extractable work is maximal, and circumstances in which the efficiency of the process is maximal.

How Pantomime Works: Implications for Theories of Language Origin

Pantomime refers to iconic gesturing that is done for communicative purposes in the absence of speech. Gestural theories of the origins of language claim that a stage of pantomime preceded speech as an initial form of referential communication. However, gestural theories conceive of pantomime as a unitary process, and do not distinguish among the various means by which it can be produced. We attempt here to develop a scheme for classifying pantomime based on a proposal of two new sub-categories of pantomime, resulting in a final scheme comprised of five categories of iconic gesturing. We employ the scheme to establish associations between the category of pantomime used and the type of action and/or object being depicted. Based on these associations, we argue that there are two basic modes of pantomiming and that these apply to distinct semantic categories of referents. These modes of pantomiming lead to two alternative models for a gestural origin of language, one based on people and one based on the environment.

Twenty-eight years of vowels: Tracking phonetic variation through young to middle age adulthood

Research on age-related changes in speech has primarily focused on comparing “young” vs. “elderly” adults. Yet, listeners are able to guess talker age more accurately than a binary distinction would imply, suggesting that acoustic characteristics of speech change continually and gradually throughout adulthood. We describe acoustic properties of vowels produced by eleven talkers based on naturalistic speech samples spanning a period of 28 years, from ages 21 to 49. We find that the position of vowels in F1/F2 space shifts towards the periphery with increasing talker age. Based on Generalized Additive Mixed Effects models, we show that this shift is not fully attributable to changes in vowel duration or to segmental context. We discuss the implications of our results for research on aging and speech, and for research in which durational shortening and spectral characteristics of vowels are assumed to reflect a unitary process of phonetic reduction.

Dissociable cognitive impairments in two strains of transgenic Alzheimer\u2019s disease mice revealed by a battery of object-based tests

Object recognition tasks detect cognitive deficits in transgenic Alzheimer’s disease (AD) mouse models. Object recognition, however, is not a unitary process, and there are many uncharacterized facets of object processing with relevance to AD. We therefore systematically evaluated object processing in 5xFAD and 3xTG AD mice to clarify the nature of object recognition-related deficits. Twelve-month-old male and female 5xFAD and 3xTG mice were assessed on tasks for object identity recognition, spatial recognition, and multisensory object perception. Memory and multisensory perceptual impairments were observed, with interesting dissociations between transgenic AD strains and sex that paralleled neuropathological changes. Overreliance on the widespread “object recognition” task threatens to slow discovery of potentially significant and clinically relevant behavioural effects related to this multifaceted cognitive function. The current results support the use of carefully designed object-based test batteries to clarify the relationship between “object recognition” impairments and specific aspects of AD pathology in rodent models.

Unity and diversity of executive functions in creativity.

Increasing evidence suggests that executive functions (EFs) - a set of general-purpose control processes that regulate thoughts and behaviors - are relevant for creativity. However, EF is not a unitary process, and it remains unclear which specific EFs are involved. The present study examined the association between the three EFs, both uniquely (EF-Specific) and together (Common EF), and three measures of creativity. Participants (N = 47) completed a divergent thinking test, and self-reported their real-life creative accomplishments. A subset of participants indicated their involvement in the artistic or information technology (IT) professions. Results indicated that fluency (but not originality) of divergent thinking was uniquely predicted by working memory Updating. Better response Inhibition predicted higher number of real-world artistic creative achievements. Involvement in the artistic (versus IT) professions was associated with better Common EF, and with enhanced mental set Shifting abilities. Results demonstrate that different EFs predict creativity depending on its operational definition.

Governance as multiplicity: the Assemblage Thinking perspective

Governance, the process of steering for collective action, is being theorized and empirically explored on a variety of subjects, private and collective issues and spatial levels. Depending on epistemological and theoretical preferences, studies adopt a hierarchical/centralized or a relational/decentralized conception of governance although they increasingly recognize that ‘hybrid governance,’ a mix of multiple models and modes, prevails in practice. Theoretical and empirical studies alike discuss sparingly, if at all, ontological issues, i.e., the nature of the ‘what’ is governed, despite their prominence for meaningful empirical analysis. A ‘system’ ontology is mostly presumed that usually produces static, context-insensitive accounts of dynamic governance phenomena and one-size-fits-all and ‘best practices’ recommendations. Since the 2000s, Assemblage Thinking (AT), a current of poststructuralist thinking, is being utilized on the grounds that the assemblage ontology better supports, conceptually and methodologically, the situated study of governance. This paper offers an overview of the application of AT in governance studies and an introductory exploration into the capacity of AT to frame a compleat approach for the applied study of governance conceived not as unitary process but as multiplicity. After summarizing the discourse on governance, the paper highlights the main features of AT and critically reviews selected assemblage-based governance studies. Then, it discusses the conceptual affinities between governance and assemblage, reconceptualizes governance, outlines the contours of an assemblage-based methodology and proposes an AT-based approach to governance. A discussion of the value of AT for applied governance studies and future research challenges conclude the paper.

Quantum Fisher information matrix for unitary processes: closed relation for SU(2)

Quantum Fisher information plays a central role in the field of quantum metrology. In this paper we study the problem of quantum Fisher information of unitary processes. Associated to each parameter $\theta_i$ of unitary process $U(\boldsymbol{\theta})$, there exists a unique Hermitian matrix $M_{\theta_i}=i(U^\dagger\partial_{\theta_i} U)$. Except for some simple cases, such as when the parameter under estimation is an overall multiplicative factor in the Hamiltonian, calculation of these matrices is not an easy task to treat even for estimating a single parameter of qubit systems. Using the Bloch vector $\boldsymbol{m}_{\theta_i}$, corresponding to each matrix $M_{\theta_i}$, we find a closed relation for the quantum Fisher information matrix of the $SU(2)$ processes for an arbitrary number of estimation parameters and an arbitrary initial state. We extend our results and present an explicit relation for each vector $\boldsymbol{m}_{\theta_i}$ for a general Hamiltonian with arbitrary parametrization. We illustrate our results by obtaining the quantum Fisher information matrix of the so-called angle-axis parameters of a general $SU(2)$ process. Using a linear transformation between two different parameter spaces of a unitary process, we provide a way to move from quantum Fisher information of a unitary process in a given parametrization to the one of the other parametrization. Knowing this linear transformation enables one to calculate the quantum Fisher information of a composite unitary process, i.e. a unitary process resulted from successive action of some simple unitary processes. We apply this method for a spin-half system and obtain the quantum Fisher matrix of the coset parameters in terms of the one of the angle-axis parameters.

How Can We Erase States Inside a Black Hole?

We investigate an entangled system, which is analogous to a composite system of a black hole and Hawking radiation. If Hawking radiation is well approximated by an outgoing particle generated from pair creation around the black hole, such a pair creation increases the total number of states. There should be a unitary mechanism to reduce the number of states inside the horizon for black hole evaporation. Because the infalling antiparticle has negative energy, as long as the infalling antiparticle finds its partner such that the two particles form a separable state, one can trace out such a zero energy system by maintaining unitarity. In this paper, based on some toy model calculations, we show that such a unitary tracing-out process is only possible before the Page time while it is impossible after the Page time. Hence, after the Page time, if we assume that the process is unitary and the Hawking pair forms a separable state, the internal number of states will monotonically increase, which is supported by the Almheiri-Marolf-Polchinski-Sully (AMPS) argument. In addition, the Hawking particles cannot generate randomness of the entire system; hence, the entanglement entropy cannot reach its maximum. Based on these results, we modify the correct form of the Page curve for the remnant picture. The most important conclusion is this: if we assume unitarity, semi-classical quantum field theory, and general relativity, then the black hole should violate the Bekenstein-Hawking entropy bound around the Page time at the latest; hence, the infinite production arguments for remnants might be applied for semi-classical black holes, which seems very problematic.

White holes as remnants: a surprising scenario for the end of a black hole

Quantum tunneling of a black hole into a white hole provides a model for the full life cycle of a black hole. The white hole acts as a long-lived remnant, providing a possible resolution to the information paradox. The remnant solution of the paradox has long been viewed with suspicion, mostly because remnants seemed to be such exotic objects. We point out that (i) established physics includes objects with precisely the required properties for remnants: white holes with small masses but large finite interiors; (ii) non-perturbative quantum gravity indicates that a black hole tunnels precisely into such a white hole, at the end of its evaporation. We address the objections to the existence of white-hole remnants, discuss their stability, and show how the notions of entropy relevant in this context allow them to evade several no-go arguments. A black hole’s formation, evaporation, tunneling to a white hole, and final slow decay, form a unitary process that does not violate any known physics.

Deconstructing value-based decision making via temporally selective manipulation of neural activity: Insights from rodent models.

The ability to choose among options that differ in their rewards and costs (value-based decision making) has long been a topic of interest for neuroscientists, psychologists, and economists alike. This is likely because this is a cognitive process in which all animals (including humans) engage on a daily basis, be it routine (which road to take to work) or consequential (which graduate school to attend). Studies of value-based decision making (particularly at the preclinical level) often treat it as a uniform process. The results of such studies have been invaluable for our understanding of the brain substrates and neurochemical systems that contribute to decision making involving a range of different rewards and costs. Value-based decision making is not a unitary process, however, but is instead composed of distinct cognitive operations that function in concert to guide choice behavior. Within this conceptual framework, it is therefore important to consider that the known neural substrates supporting decision making may contribute to temporally distinct and dissociable components of the decision process. This review will describe this approach for investigating decision making, drawing from published studies that have used techniques that allow temporal dissection of the decision process, with an emphasis on the literature in animal models. The review will conclude with a discussion of the implications of this work for understanding pathological conditions that are characterized by impaired decision making.

Gender identities and farm survival: Women's activities in the agricultural sector in remote rural areas

Despite the structurally deterministic leanings of the literature about women and farms over time, new studies have attempted to identify the ways in which women’s positions in the rural household are reinforced, stressing the factor of visibility in the labor force. The entrepreneurial processes and commodification practices through which women engage in a range of different kinds of productive activity, such as agrotourism and the production of organic crops, are frequently cited as sources of empowerment for women on farms . However, since this new trend is not a unitary and homogeneous process, the present study examines the role of women in agriculture by taking into account the positionality of the specific actors, as well as their conflicts and negotiations within particular sociocultural contexts. Our analysis is based on sets of in-depth interviews with full-time farm women in Jirestan, north-eastern Iran. Findings indicate that Jirestan’s women identify themselves both as “producers” and “entrepreneurs.” Commercial gardens, in addition to new farming styles and the reproduction of sales of traditional local produce, have created this “hybrid” identity. Although farms are being re-constructed as shared businesses with an increase in the role of women, the latter still adhere to patriarchal traditions and social norms and consider themselves helpers and housewives.

LIBERATION, FREE MUTUAL INFORMATION AND ORBITAL FREE ENTROPY

In this paper, we perform a detailed spectral study of the liberation process associated with two symmetries of arbitrary ranks: $(R,S)\mapsto (R,U_{t}SU_{t}^{\ast })_{t\geqslant 0}$, where $(U_{t})_{t\geqslant 0}$ is a free unitary Brownian motion freely independent from $\{R,S\}$. Our main tool is free stochastic calculus which allows to derive a partial differential equation (PDE) for the Herglotz transform of the unitary process defined by $Y_{t}:=RU_{t}SU_{t}^{\ast }$. It turns out that this is exactly the PDE governing the flow of an analytic function transform of the spectral measure of the operator $X_{t}:=PU_{t}QU_{t}^{\ast }P$ where $P,Q$ are the orthogonal projections associated to $R,S$. Next, we relate the two spectral measures of $RU_{t}SU_{t}^{\ast }$ and of $PU_{t}QU_{t}^{\ast }P$ via their moment sequences and use this relationship to develop a theory of subordination for the boundary values of the Herglotz transform. In particular, we explicitly compute the subordinate function and extend its inverse continuously to the unit circle. As an application, we prove the identity $i^{\ast }(\mathbb{C}P+\mathbb{C}(I-P);\mathbb{C}Q+\mathbb{C}(I-Q))=-\unicode[STIX]{x1D712}_{\text{orb}}(P,Q)$.

Some limit laws for quantum walks with applications to a version of the Parrondo paradox

A quantum walker moves on the integers with four extra degrees of freedom, performing a coin-shift operation to alter its internal state and position at discrete units of time. The time evolution is described by a unitary process. We focus on finding the limit probability law for the position of the walker and study it by means of Fourier analysis. The quantum walker exhibits both localization and a ballistic behavior. Our two results are given as limit theorems for a 2-period time-dependent walk and they describe the location of the walker after it has repeated the unitary process a large number of times. The theorems give an analytical tool to study some of the Parrondo type behavior in a quantum game which was studied by J. Rajendran and C. Benjamin by means of very nice numerical simulations [1]. With our analytical tools at hand we can easily explore the "phase space" of parameters of one of the games, similar to the winning game in their papers. We include numerical evidence that our two games, similar to theirs, exhibit a Parrondo type paradox.

Scheme for media conversion between electronic spin and photonic orbital angular momentum based on photonic nanocavity.

Light with nonzero orbital angular momentum (OAM) or twisted light is promising for quantum communication applications such as OAM-entangled photonic qubits. Methods and devices for the conversion of the photonic OAM to photonic spin angular momentum (SAM), as well as for the photonic SAM to electronic SAM transformation are known but the direct conversion between the photonic OAM and electronic SAM is not available within a single device. Here, we propose a scheme which converts photonic OAM to electronic SAM and vice versa within a single nanophotonic device. We employed a photonic crystal nanocavity with an embedded quantum dot (QD) which confines an electron spin as a stationary qubit. The confined spin-polarized electrons could recombine with holes to give circularly polarized emission, which could drive the rotation of the nanocavity modes via the strong optical spin-orbit interaction. The rotating modes then radiate light with nonzero OAM, allowing this device to serve as a transmitter. As this can be a unitary process, the time-reversed case enables the device to function as a receiver. This scheme could be generalized to other systems with a resonator and quantum emitters such as a microdisk and defects in diamond for example. Our scheme shows the potential for realizing an (ultra)compact electronic SAM-photonic OAM interface to accommodate OAM as an additional degree of freedom for quantum information purposes.

Alpha and beta band correlates of haptic perceptual grouping: Results from an orientation detection task.

Behavioral and neurophysiological findings in vision suggest that perceptual grouping is not a unitary process and that different grouping principles have different processing requirements and neural correlates. The present study aims to examine whether the same occurs in the haptic modality using two grouping principles widely studied in vision, spatial proximity and texture similarity. We analyzed behavioral responses (accuracy and response times) and conducted an independent component analysis of brain oscillations in alpha and beta bands for haptic stimuli grouped by spatial proximity and texture similarity, using a speeded orientation detection task performed on a novel haptic device (MonHap). Behavioral results showed faster response times for patterns grouped by spatial proximity relative to texture similarity. Independent component clustering analysis revealed the activation of a bilateral network of sensorimotor and parietal areas while performing the task. We conclude that, as occurs in visual perception, grouping the elements of the haptic scene by means of their spatial proximity is faster than forming the same objects by means of texture similarity. In addition, haptic grouping seems to involve the activation of a network of widely distributed bilateral sensorimotor and parietal areas as reflected by the consistent event-related desynchronization found in alpha and beta bands.

Sustainability evaluation of sugarcane bagasse valorization alternatives in valle del cauca - Colombia

In the present paper, an evaluation methodology of the sustainability was proposed in order to select the best way to value the sugarcane bagasse, taking into account the environmental management of the process, economic indexes, and social relevant aspects. To evaluate the environmental dimension, the Life Cycle Assessment (LCA) methodology and the LCA specialized software SIMAPRO was used. Six Impact categories were evaluated: acidification (Kg eq SO2), eutrophication (Kg eq PO4), climatic change (Kg eq CO2), photochemical oxidation (Kg eq C2H4), ozone layer depletion (Kg eq CFC-11) and abiotic damage (Kg eq Sb). It was found that in the case of co-generation use of sugarcane bagasse, the unitary process that generates greater environmental impact is the boiler and in the case of paper production, it’s the pulp bleaching. The economic dimension was evaluated using the Life Cycle Cost (LCC) methodology. This methodology analyzes the economic aspects through the life cycle of the sugar cane bagasse. The Internal Rate of Return (IRR) was selected as the economic indicator, the value obtained for this indicator for the co- generation process was 0,355 and for the paper production process 1,816. Both results show economic cost- effectiveness. A stakeholder analysis was made in order to evaluate the social dimension. For each process, the power and interest criteria were evaluated. It was found that in the process of cogeneration, power and interest levels are 4 and 5,4 out of 10 respectively, and in the process of paper, power level was 3,1 and interest 5,2 out of 10. Finally, the results of the three dimensions were integrated using the Analytical Hierarchy Process methodology (AHP): Environmental dimension obtained with LCA, Economic dimension evaluated with LCC and social dimension calculated with stakeholder analysis. The main conclusion is that the most sustainable use of sugarcane bagasse is the raw material in the paper industry. Some sustainability recommendations were given for both processes evaluated.

Distinct Interplay Between Atrophy and Hypometabolism in Alzheimer's Versus Semantic Dementia.

Multimodal neuroimaging analyses offer additional information beyond that provided by each neuroimaging modality. Thus, direct comparisons and correlations between neuroimaging modalities allow revealing disease-specific topographic relationships. Here, we compared the topographic discrepancies between atrophy and hypometabolism in two neurodegenerative diseases characterized by distinct pathological processes, namely Alzheimer's disease (AD) versus semantic dementia (SD), to unravel their specific influence on local and global brain structure-function relationships. We found that intermodality topographic discrepancies clearly distinguished the two patient groups: AD showed marked discrepancies between both alterations, with greater hypometabolism than atrophy in large posterior associative neocortical regions, while SD showed more topographic consistency between atrophy and hypometabolism across brain regions. These findings likely reflect the multiple pathologies versus the relatively unitary pathological process underlying AD versus SD respectively. Our results evidence that multimodal neuroimaging-derived indexes can provide clinically relevant information to discriminate the two diseases, and potentially reveal distinct neuropathological processes.