Bipartite unitary gates and billiard dynamics in the Weyl chamber

Long time behavior of a unitary quantum gate $U$, acting sequentially on two subsystems of dimension $N$ each, is investigated. We derive an expression describing an arbitrary iteration of a two-qubit gate making use of a link to the dynamics of a free particle in a $3D$ billiard. Due to ergodicity of such a dynamics an average along a trajectory $V^t$ stemming from a generic two-qubit gate $V$ in the canonical form tends for a large $t$ to the average over an ensemble of random unitary gates distributed according to the flat measure in the Weyl chamber - the minimal $3D$ set containing points from all orbits of locally equivalent gates. Furthermore, we show that for a large dimension $N$ the mean entanglement entropy averaged along a generic trajectory coincides with the average over the ensemble of random unitary matrices distributed according to the Haar measure on $U(N^2)$

Niche Brands: Understanding how niche fashion startups connect with Millennials

Purpose – The purpose of this paper is to investigate and understand how niche fashion startups brand toward Millennials. Millennials, also known as Generation Y, are becoming an important segment of the global population. Specifically, this study is designed to investigate if niche fashion brands successfully target and brand to Millennials consumers compared to mass-market brands on the following brand traits: brand self-congruency, perceived quality, brand prestige, brand loyalty, brand tribalism, and brand user image congruency. Design/methodology/approach –Two online surveys were conducted to compare Gap (mass- retailer) and Everlane (niche brand) on the seven brand components, and 46 valid surveys were collected. Findings – The study revealed that Everlane performed better than Gap on three branding elements (brand tribalism, brand user image congruency, and brand prestige suggesting that not only the Integrated Marketing Communications efforts taken by Everlane are targeting Millennials, but that through IMC, Everlane is crafting brand equity among the cohort. This study provides a model to study other Millennials and analyze the company against a comparable mass-market competitor. Research limitations/implications – Limitations for this study come from three sources: (1) the representativeness of the sample, (2) limited sampled brands, and (3) influence of other factors. Implications for brand managers, marketers, and retailers focus on strategies that influence the social and self-motivation for luxury consumption and level of brand consciousness. Originality/value – This research is unique and significant because it focuses on understanding the consumer behavior of Millennial consumers, an important segment in the market that is growing in market power. The study is the first to analyze new startups coined as ‘niche brands’ that are targeting Millennials and compare them to mass-market retailers

Review of “All Shook Up”: The Archival Legacy of Terry Cook

Review of “All Shook Up”: The Archival Legacy of Terry Cook

Constitutional privacy: The evolution of a doctrine

Although the right to privacy is not actually enumerated in the Constitution, over a century of common law precedent and judicial interpretation has authorized certain personal activities as being outside the scope of governmental regulation. The constitutional defense of such freedoms have been regarded as Fourteenth Amendment due process guarantees to life, liberty, and property. In Griswold v. Connecticut, the Supreme Court ruled that proscribing the use of contraceptives to married couples was unduly burdensome. Judicial acknowledgment of the right to privacy invited further challenges which involved intensely personal situations and choices, the most controversial of which is the right to choose abortion. Roe v. Wade was the precedent setting case. A succession of subsequent cases made their way to the Supreme Court which clarified the degree of state regulation and in the process expanded the right to privacy and reproductive choice. The most recent cases changed that trend allowing states greater latitude in regulating abortion. (Abstract shortened with permission of author.)

Grãos verdes: influência na qualidade dos produtos à base de soja - Série Sementes.

Condições de estresse climático e incidência de grãos verdes. Grãos verdes e seus efeitos sobre a qualidade da soja e de seus produtos derivados. Qualidade do óleo. Qualidade das proteínas.bitstream/item/53614/1/CT90-OL1.pd

Microscopic description for the emergence of collective dissipation in extended quantum systems

Practical implementations of quantum technology are limited by unavoidable effects of decoherence and dissipation. With achieved experimental control for individual atoms and photons, more complex platforms composed by several units can be assembled enabling distinctive forms of dissipation and decoherence, in independent heat baths or collectively into a common bath, with dramatic consequences for the preservation of quantum coherence. The cross-over between these two regimes has been widely attributed in the literature to the system units being farther apart than the bath's correlation length. Starting from a microscopic model of a structured environment (a crystal) sensed by two bosonic probes, here we show the failure of such conceptual relation, and identify the exact physical mechanism underlying this cross-over, displaying a sharp contrast between dephasing and dissipative baths. Depending on the frequency of the system and, crucially, on its orientation with respect to the crystal axes, collective dissipation becomes possible for very large distances between probes, opening new avenues to deal with decoherence in phononic baths