Refusing reconciliation with settler colonialism : wider lessons from the Maine Wabanaki-State Child Welfare Truth and Reconciliation Commission

The Maine Wabanaki-State Child Welfare Truth and Reconciliation Commission (MWTRC) is one of the more recent examples of the truth and reconciliation model being used in a settler colonial context. This article argues that the MWTRC highlighted a historical and continued refusal by Wabanaki people to ongoing systems of white settler violence especially in the form of Native child welfare. Examining the MWTRC through the lens of refusal allows for a critical analysis of the ways in which the MWTRC subverts neoliberal reconciliation models that leave colonial structures unchallenged and unchanged. The MWTRC, as a process founded and led by Wabanaki and settler social workers and Wabanaki survivors of the child welfare system, actively refused reconciliation with settler colonialism. Instead it sought a process predicated on a relationship that accepted the realities of historical and continued oppression of Wabanaki people and sought long-term transformative change for Wabanaki people. Relying on two years of conversations between the authors and the community of Wabanaki and settler individuals who initiated and partook in this process, this article offers an analysis of the MWTRC and how its strategy of refusal denied settler colonial co-option of a Wabanaki-centred process.Publisher PDFPeer reviewe

Optimal approach to quantum communication using dynamic programming

Reliable preparation of entanglement between distant systems is an outstanding problem in quantum information science and quantum communication. In practice, this has to be accomplished via noisy channels (such as optical fibers) that generally result in exponential attenuation of quantum signals at large distances. A special class of quantum error correction protocols--quantum repeater protocols--can be used to overcome such losses. In this work, we introduce a method for systematically optimizing existing protocols and developing new, more efficient protocols. Our approach makes use of a dynamic programming-based searching algorithm, the complexity of which scales only polynomially with the communication distance, letting us efficiently determine near-optimal solutions. We find significant improvements in both the speed and the final state fidelity for preparing long distance entangled states.Comment: 9 pages, 6 figure

Relations for classical communication capacity and entanglement capability of two-qubit operations

Bipartite operations underpin both classical communication and entanglement generation. Using a superposition of classical messages, we show that the capacity of a two-qubit operation for error-free entanglement-assisted bidirectional classical communication can not exceed twice the entanglement capability. In addition we show that any bipartite two-qubit operation can increase the communication that may be performed using an ensemble by twice the entanglement capability.Comment: 4 page

A classical analogue of entanglement

We show that quantum entanglement has a very close classical analogue, namely secret classical correlations. The fundamental analogy stems from the behavior of quantum entanglement under local operations and classical communication and the behavior of secret correlations under local operations and public communication. A large number of derived analogies follow. In particular teleportation is analogous to the one-time-pad, the concept of ``pure state'' exists in the classical domain, entanglement concentration and dilution are essentially classical secrecy protocols, and single copy entanglement manipulations have such a close classical analog that the majorization results are reproduced in the classical setting. This analogy allows one to import questions from the quantum domain into the classical one, and vice-versa, helping to get a better understanding of both. Also, by identifying classical aspects of quantum entanglement it allows one to identify those aspects of entanglement which are uniquely quantum mechanical.Comment: 13 pages, references update

The Maine Wabanaki-State Child Welfare Truth and Reconciliation Commission: Perceptions and Understandings

As this chapter demonstrates, the MWTRC represents a unique and creative approach to healing in communities affected by historical trauma. This chapter presents the history and context of the MWTRC. Drawing on interviews with the key participants4 in the MWTRC creation process, we explain the structure, mandate and role of the MWTRC and the accompanying community support structures that have been created. Key themes emerging from the interviews with the participants in the process are then discussed. The chapter shows that, originating in a deep understanding of the complex individual, family and community trauma that Wabanaki people have endured, the MWTRC embodies a collective desire for truth, healing and change. It provides a space for the articulation of a silenced history, and a process within which traumatic experiences and the trauma of memory can be shared in solidarity. The uniqueness of the MWTRC—a grassroots, community-organized, Indigenous community-state collaboration— makes it an important process for scholars and practitioners to follow. Although it faces challenges and tensions and involves difficult dialogues on race, privilege and accountability, this MWTRC is a new kind of truth commission, linking reconciliation with decolonization, and truth with practical policy change, in the process creating an important model of community-based conflict transformation and trauma recovery that has potentially wider implications for other communities—Indigenous, and non-Indigenous—seeking to reconcile, and to heal, after a period of long-term trauma. To see why such healing is truly necessary, this chapter turns to a summary of the historical context of trauma that the MWTRC aims to address

RE-0756-01: Effectiveness of Mechanical Treatment of Crack-Arrest Holes Subject to Distortion-Induced Fatigue

This report details a study that was aimed at assessing the effectiveness of mechanically-treating crack arrest holes used at the tips of distortion-induced fatigue cracks. Different mechanisms are possible for producing expansion of crack-arrest holes drilled at the tips of fatigue cracks, and such treatments have shown to be effective in improving the fatigue performance of cracks subjected to in-plane loading. However, prior research has not established the effectiveness of crack-arrest hole cold-expansion for distortion-induced fatigue applications. Because the majority of fatigue cracks in bridges are caused by distortion-induced fatigue mechanisms, this study aimed to explore whether cold-expansion of crack-arrest holes can be expected to produce any benefit to fatigue life. An analytical investigation was undertaken in which C(T) specimens were modeled using 3D finite element analysis. The study included the modeled specimens being loaded in Mode I (in-plane loading) and Mode III (out-of-plane loading). In addition to different loading directions, the suite of finite element models included cracks of different lengths, as well as different diameter crack-arrest holes. The models included nonlinear material properties to capture inelastic effects. In some of the models, the crack-arrest holes were subjected to cold expansion and allowed to develop compressive residual stresses. Stresses around the crack-arrest holes were examined for models with and without the cold-expansion treatment. The study clearly showed that while there can be expected a beneficial influence from cold-expansion for in-plane loading, no such beneficial effect existed for distortion-induced fatigue (out-of-plane loading). Based on these results, the authors concluded that crack arrest hole treatment can be expected to have limited to no practical benefit when considering cracks caused by distortion-induced fatigue.Kansas Department of Transportatio

Low Timing Jitter Detector for Gigahertz Quantum Key Distribution

A superconducting single-photon detector based on a niobium nitride nanowire is demonstrated in an optical-fibre-based quantum key distribution test bed operating at a clock rate of 3.3 GHz and a transmission wavelength of 850 nm. The low jitter of the detector leads to significant reduction in the estimated quantum bit error rate and a resultant improvement in the secrecy efficiency compared to previous estimates made by use of silicon single-photon avalanche detectors.Comment: 11 pages, including 2 figure

Regeneration of Old Ungrazed Old Man Saltbush (\u3ci\u3eAtriplex nummularia\u3c/i\u3e) Stands in South-West Australia

Many old man saltbush (Atriplex nummularia) stands were sown in the grainbelt of Western Australia for soil regeneration and salinity management up to 25 years ago, but have not been effectively grazed subsequently, such that the main feed available for sheep is above grazing height. The aim of the study was therefore to see if it was possible to return the old man saltbush stands to a productive grazing stand. Two sites were chosen that had been sown up to 25 years previously in Goomalling and Corrigin, in the south-west of Western Australia. The sites were split into four treatments that would reduce the height of the stands and bring all grazing material back to less than 1.2 m (the maximum grazing height for sheep in Australia); cutting to 0.5 m, cutting to 1 m, rolling to ground level, and a uncut control. Available feed above and below 1.2 m was assessed before cutting or rolling and then four times over the next two years. The results found that all three treatments removed feed above 1.2 m and that after 2 years the amount of feed below 1.2 m was increasing. The greatest feed available below 1.2 m was in the rolled treatment, followed by cutting to 0.5 m. Cutting old man saltbush stands to 1 m provides greater feed on the plants after cutting, but within one year of cutting some of the new feed is already above grazing height. It is concluded there is potential to return old established stands of old man saltbush to a productive grazing stand

On the communication cost of entanglement transformations

We study the amount of communication needed for two parties to transform some given joint pure state into another one, either exactly or with some fidelity. Specifically, we present a method to lower bound this communication cost even when the amount of entanglement does not increase. Moreover, the bound applies even if the initial state is supplemented with unlimited entanglement in the form of EPR pairs, and the communication is allowed to be quantum mechanical. We then apply the method to the determination of the communication cost of asymptotic entanglement concentration and dilution. While concentration is known to require no communication whatsoever, the best known protocol for dilution, discovered by Lo and Popescu [Phys. Rev. Lett. 83(7):1459--1462, 1999], requires a number of bits to be exchanged which is of the order of the square root of the number of EPR pairs. Here we prove a matching lower bound of the same asymptotic order, demonstrating the optimality of the Lo-Popescu protocol up to a constant factor and establishing the existence of a fundamental asymmetry between the concentration and dilution tasks. We also discuss states for which the minimal communication cost is proportional to their entanglement, such as the states recently introduced in the context of ``embezzling entanglement'' [W. van Dam and P. Hayden, quant-ph/0201041].Comment: 9 pages, 1 figure. Added a reference and some further explanations. In v3 some arguments are given in more detai

Better detection of Multipartite Bound Entanglement with Three-Setting Bell Inequalities

It was shown in Phys. Rev. Lett., 87, 230402 (2001) that N (N >= 4) qubits described by a certain one parameter family F of bound entangled states violate Mermin-Klyshko inequality for N >= 8. In this paper we prove that the states from the family F violate Bell inequalities derived in Phys. Rev. A, 56, R1682 (1997), in which each observer measures three non-commuting sets of orthogonal projectors, for N >=7. We also derive a simple one parameter family of entanglement witnesses that detect entanglement for all the states belonging to F. It is possible that these new entanglement witnesses could be generated by some Bell inequalities.Comment: Revtex4, 1 figur