Geometric Entanglement of Symmetric States and the Majorana Representation

Permutation-symmetric quantum states appear in a variety of physical situations, and they have been proposed for quantum information tasks. This article builds upon the results of [New J. Phys. 12, 073025 (2010)], where the maximally entangled symmetric states of up to twelve qubits were explored, and their amount of geometric entanglement determined by numeric and analytic means. For this the Majorana representation, a generalization of the Bloch sphere representation, can be employed to represent symmetric n qubit states by n points on the surface of a unit sphere. Symmetries of this point distribution simplify the determination of the entanglement, and enable the study of quantum states in novel ways. Here it is shown that the duality relationship of Platonic solids has a counterpart in the Majorana representation, and that in general maximally entangled symmetric states neither correspond to anticoherent spin states nor to spherical designs. The usability of symmetric states as resources for measurement-based quantum computing is also discussed.Comment: 10 pages, 8 figures; submitted to Lecture Notes in Computer Science (LNCS

Internet of Things for Sustainable Forestry

Forests and grasslands play an important role in water and air purification, prevention of the soil erosion, and in provision of habitat to wildlife. Internet of Things has a tremendous potential to play a vital role in the forest ecosystem management and stability. The conservation of species and habitats, timber production, prevention of forest soil degradation, forest fire prediction, mitigation, and control can be attained through forest management using Internet of Things. The use and adoption of IoT in forest ecosystem management is challenging due to many factors. Vast geographical areas and limited resources in terms of budget and equipment are some of the limiting factors. In digital forestry, IoT deployment offers effective operations, control, and forecasts for soil erosion, fires, and undesirable depositions. In this chapter, IoT sensing and communication applications are presented for digital forestry systems. Different IoT systems for digital forest monitoring applications are also discussed

Highly symmetric POVMs and their informational power

We discuss the dependence of the Shannon entropy of normalized finite rank-1 POVMs on the choice of the input state, looking for the states that minimize this quantity. To distinguish the class of measurements where the problem can be solved analytically, we introduce the notion of highly symmetric POVMs and classify them in dimension two (for qubits). In this case we prove that the entropy is minimal, and hence the relative entropy (informational power) is maximal, if and only if the input state is orthogonal to one of the states constituting a POVM. The method used in the proof, employing the Michel theory of critical points for group action, the Hermite interpolation and the structure of invariant polynomials for unitary-antiunitary groups, can also be applied in higher dimensions and for other entropy-like functions. The links between entropy minimization and entropic uncertainty relations, the Wehrl entropy and the quantum dynamical entropy are described.Comment: 40 pages, 3 figure

The old bone project: Quality assurance on radiocarbon dating bone in the 30,000–50,000 age range at the A.E. Lalonde AMS Laboratory (Ottawa, Canada)

A quality control program was undertaken to test the merit of different techniques for the preparation of Late Pleistocene bone at the A.E. Lalonde AMS Laboratory in Ottawa (Canada). The samples studied here include a mammoth bone (S-EVA 2000) previously dated by other labs (Oxford, Kiel, Mannheim) with results ranging between 35,280 and 31,660 14C yr BP (n = 10), a bison bone (S-EVA 2001) previously dated between 47,300 and 40,200 14C yr BP (n = 9; Talamo and Richards, 2011), and our in-house background standard (Hollis Mine Mammoth, HMM). Samples were prepared in four different ways: (1) no ultrafiltration and combustion by elemental analyser (EA); (2) ultrafiltration and EA combustion; (3) no ultrafiltration and quartz tube combustion; (4) ultrafiltration and quartz tube combustion. All four methods produced dates for the S-EVA 2000 bone between 34,530 and 34,080 14C yr BP (n = 7) and consistent stable isotope data (δ13C, δ15N, C:N). Results for the HMM bone ranged from 54,600 to 46,800 14C yr BP. Further, the S-EVA 2001 was prepared without ultrafiltration and combusted on the EA, resulting in a date of 45,010 ± 460 14C yr BP. Finally, since a major challenge with dating Late Pleistocene bone is to decipher between finite and infinite ages, we report results from two years of measurement of the HMM bone, which is prepared with each bone batch. The average age of the HMM is 50,700 ± 3400 14C yr BP (n = 17) when not ultrafiltered, and 48,400 ± 2900 14C yr BP (n = 13) when ultrafiltered. Results from this study do not reinforce or negate the use of ultrafiltration, but it was determined that combustion by EA is preferred as it gives %C and %N values

Famciclovir for ophthalmic zoster: a randomised aciclovir controlled study

AIMS—To compare the efficacy and safety of famciclovir with aciclovir for the treatment of ophthalmic zoster.
METHODS—Randomised, double masked, aciclovir controlled, parallel group in 87 centres worldwide including 454 patients with ophthalmic zoster of trigeminal nerve (V(1)) comprised the intent to treat population. Oral famciclovir 500 mg three times daily or oral aciclovir 800 mg five times daily for 7 days. Assessments included day 0 (screening), days 3 and 7 (during treatment), days 10, 14,( )21, 28 and monthly thereafter, up to 6 months (follow up). Proportion of patients who experienced ocular manifestations, severe manifestations and non-severe manifestations; loss of visual acuity was the main outcome measure.
RESULTS—The percentage of patients who experienced one or more ocular manifestations was similar for famciclovir (142/245, 58.0%) and aciclovir (114/196, 58.2%) recipients, with no significant difference between groups (OR 0.99; 95% CI 0.68, 1.45). The percentage of patients who experienced severe and non-severe manifestations was similar between groups, with no significant difference. The prevalence of individual ocular manifestations was comparable between groups. There was no significant difference between groups for visual acuity loss.
CONCLUSION—Famciclovir 500 mg three times daily was well tolerated and demonstrated efficacy similar to aciclovir 800 mg five times daily.


Transnational Psychology In The classroom: A Pluralistic Approach

This chapter suggests ways to help instructors and students understand transnational concepts more fully and hopefully adopt a more transnational research program and psychological perspective. Teaching transnational psychology requires a transformation in instructors\u27 and students\u27 appreciation for the range of impacts of globalization on individuals and communities and the extent to which globalization and power asymmetries may influence psychological phenomena. Transnational psychological perspectives require the rejection of assumptions of universality and greater examination of reciprocal interactions among multiple dynamic, intersecting factors. Through the assignments and activities, instructors can help students disrupt their belief systems and look at psychological constructs and data from the perspectives of Global Majority communities. The chapter describes readings, assignments, and classroom activities that can be used in any class in which transnational psychology is covered. It is useful in infusing transnational psychology into the curriculum generally, as well as enriching a dedicated course on the topic. (PsycInfo Database Record (c) 2022 APA, all rights reserved

Ověření možnosti zavedení kontinuálního měření sledovaných ukazatelů

Import 20/04/2006Prezenční výpůjčkaVŠB - Technická univerzita Ostrava. Fakulta hornicko-geologická. Institut environmentálního inženýrství (546