4,100 research outputs found
Tunable phonon-induced steady-state coherence in a double-quantum-dot charge qubit
No full textCharge qubits can be created and manipulated in solid-state double-quantum-dot (DQD) platforms. Typically, these systems are strongly affected by quantum noise stemming from coupling to substrate phonons. This is usually assumed to lead to decoherence towards steady states that are diagonal in the energy eigenbasis. In this letter we show, to the contrary, that due to the presence of phonons the equilibrium steady state of the DQD charge qubit may be engineered to display coherence in the energy eigenbasis. The magnitude of the coherence can be controlled by tuning the DQD parameters and regimes of high purity maybe found. In addition, we show that the steady-state coherence can be used to drive an auxiliary cavity mode coupled to the DQD
The sense of a beginning : Bakhtinian dialogic criticism on 'the gospel' in Mark.
Full text linkContemporary literary approaches have caused paradigm shifts in Biblical Studies in the last two decades as it appears in a great deal of Markan studies using narrative, reader-response, deconstructive, feminist, and new historicist approaches. However, literary studies on the Gospel of Mark have not taken into account theoretical questions underlying those approaches. As a result biblical critics are driven by new trends without ever having a chance to examine the critical baggage of the approaches. Consequently, there is a gap of communication between the old and the new one. Therefore this thesis is an attempt to meet the need of enhancing the quality of critical endeavour in biblical studies. In the light of most recent competing critical theories of literature, the first contribution of this thesis is the methodological finding that Bakhtinian dialogic criticism contains the most profound philosophical and practical foundations for solving some crucial theoretical problems in contemporary literary theories. It is a critique to a Saussurian linguistic system of language which becomes the very foundation of modern and postmodern literary criticism. Bakhtinian literary theory shifts the foundation of literary criticism on linguistic signs into the creative activity of the socio-cultural production of human communication. The shift into socio-cultural reality of language communication makes the notion of 'genre' very important to unlock the problem of text and context in literary studies. Since the Gospel of Mark has fascinated most literary critics in Biblical Studies, the problem of 'genre' of this gospel is chosen as the focus of this study. Secondly, as no agreement is reached as to what 'genre' the Gospel of Mark belongs, this thesis makes its contribution to the discussion by locating the problem of 'genre' of Mark in the context of genre theories and argues that the Bakhtinian suggestion to find genre in the socio-cultural sphere by analysing artistic intercourse between narrative agents in Mark has freed the competing analysis from the unresolved problem between the kerygmatic (content oriented) approach and the analogical (form oriented) approach. To achieve finding 'genre' in the socio-cultural sphere, this thesis focuses on Bakhtinian analysis of the process of artistic intercourse between narrative agents. The narrative communicative interrelationships between narrative agents is constructed in this thesis as a 'stereophonic' Bakhtinian model of dialogic communication. This model is an original contribution of this thesis for revising the traditional two dimensional model of narrative communication. Based on this dialogical model of communication, a special role is given to the Bakhtinian 'author-creator' in the realization process of genre through the interaction of polyphonic voices. Through the interaction of voices of the author-artist and the hero we are led to discover a relatively stable type of portraying and controlling reality in Mark, known as the genre of Roman 'satire'. The closest literary affinity is Satyrica by Petronius. This narrative strategy of 'satire' in Mark has its root in the prophetic discourse of the Old Testament which is saturating the speech of the narrator, John the Immerser, the centurion, the people, and even Jesus. Finally, the whole search for Markan 'genre' culminates in the analysis of the realization of genre through the analysis of Bakhtinian chronotope. The reality of the genre of Mark is its social reality that is in its role as dpxrj/ 'beginning'. As the Gospel of Mark proclaims itself as 'a beginning', it defines its claim of socio-cultural 'authority' in early Christianity. It is this 'sense of beginning' which enables the narrating and the narrated world of Mark to interact dialogically
Powering an autonomous clock with quantum electromechanics
Full text linkWe theoretically analyse an autonomous clock comprising a
nanoelectromechanical system, which undergoes self-oscillations driven by
electron tunnelling. The periodic mechanical motion behaves as the clockwork,
similar to the swinging of a pendulum, while induced oscillations in the
electrical current can be used to read out the ticks. We simulate the dynamics
of the system in the quasi-adiabatic limit of slow mechanical motion, allowing
us to infer statistical properties of the clock's ticks from the current
auto-correlation function. The distribution of individual ticks exhibits a
tradeoff between accuracy, resolution, and dissipation, as expected from
previous literature. Going beyond the distribution of individual ticks, we
investigate how clock accuracy varies over different integration times by
computing the Allan variance. We observe non-monotonic features in the Allan
variance as a function of time and applied voltage, which can be explained by
the presence of temporal correlations between ticks. These correlations are
shown to yield a precision advantage for timekeeping over the timescales that
the correlations persist. Our results illustrate the non-trivial features of
the tick series produced by nanoscale clocks, and pave the way for experimental
investigation of clock thermodynamics using nanoelectromechanical systems.Comment: 10 pages, 8 figure
Well-known trade mark protection: confusion in EU and Japan
No full textIn this thesis concerning the protection of well-known trade marks against confusion in the European Community Trade Mark (CTM) and Japanese trademark systems, the author critically considers the difficulties in comprehensively defining ‘well-known trade mark’ in the relevant international trade mark instruments. After critical analysis of various definitions of both ‘trade mark’ and ‘well-known trade mark’, she undertakes a comparison of the definitions of the parallel concepts of ‘trade mark of repute’ and ‘syuchi-syohyo’, and also undertakes an assessment as to the extent to which these trade marks are protected against confusion and kondo in the CTM and Japanese systems, respectively. It is concluded that the protection of well- known trade marks against confusion in the CTM and Japan cannot be said to be completely clear, and the author identifies some areas for legal refor
Taking the temperature of a pure quantum state
Full text linkTemperature is a deceptively simple concept that still raises deep questions at the forefront of quantum physics research. The observation of thermalization in completely isolated quantum systems, such as cold-atom quantum simulators, implies that a temperature can be assigned even to individual, pure quantum states. Here, we propose a scheme to measure the temperature of such pure states through quantum interference. Our proposal involves interferometry of an auxiliary qubit probe, which is prepared in a superposition state and subsequently decoheres due to weak coupling with a closed, thermalized many-body system. Using only a few basic assumptions about chaotic quantum systems, namely, the eigenstate thermalization hypothesis and the emergence of hydrodynamics at long times, we show that the qubit undergoes pure exponential decoherence at a rate that depends on the temperature of its surroundings. We verify our predictions by numerical experiments on a quantum spin chain that thermalizes after absorbing energy from a periodic drive. Our Letter provides a general method to measure the temperature of isolated, strongly interacting systems under minimal assumptions
The Gospel on the Margins: The Ideological Function of the Patristic Tradition on the Evangelist Mark
Full text linkIn spite of the virtually unanimous patristic opinion that the evangelist Mark was the interpreter of Peter, one of the most prestigious apostolic founding figures in Christian memory, the Gospel of Mark was mostly neglected in the patristic period. Not only is the text of Mark the least well represented of the canonical Gospels in terms of the number of patristic citations, commentaries and manuscripts, the explicit comments about the evangelist Mark reveal some ambivalence about its literary or theological value. In my survey of the reception of Mark from Papias of Hierapolis until Clement of Alexandria, I will argue that the reason why the patristic writers were hesitant to embrace the Gospel of Mark was that they perceived the text to be amenable to the Christological beliefs and social praxis of rival Christian factions. The patristic tradition about Mark may have little historical basis, but it had an important ideological function in appropriating the text in the name of an apostolic authority from the margins or periphery
In Situ Thermometry of a Cold Fermi Gas via Dephasing Impurities
No full textThe precise measurement of low temperatures is a challenging, important, and fundamental task for quantum science. In particular, in situ thermometry is highly desirable for cold atomic systems due to their potential for quantum simulation. Here, we demonstrate that the temperature of a noninteracting Fermi gas can be accurately inferred from the nonequilibrium dynamics of impurities immersed within it, using an interferometric protocol and established experimental methods. Adopting tools from the theory of quantum parameter estimation, we show that our proposed scheme achieves optimal precision in the relevant temperature regime for degenerate Fermi gases in current experiments. We also discover an intriguing trade-off between measurement time and thermometric precision that is controlled by the impurity-gas coupling, with weak coupling leading to the greatest sensitivities. This is explained as a consequence of the slow decoherence associated with the onset of the Anderson orthogonality catastrophe, which dominates the gas dynamics following its local interaction with the immersed impurity
Incomprehension or resistance? : the Markan disciples and the narrative logic of Mark 4:1—8:30
No full textThe characterization of the Markan disciples has been and continues to be the object of much scholarly reflection and speculation. For many, the Markan author’s presentation of Jesus’ disciples holds a key, if not the key, to unlocking the purpose and function of the gospel as a whole. Commentators differ as to whether the Markan disciples ultimately serve a pedagogical or polemical function, yet they are generally agreed that the disciples in Mark come off rather badly, especially when compared to their literary counterparts in Matthew, Luke, and John.
This narrative-critical study considers the characterization of the Markan disciples within the Sea Crossing movement (Mark 4:1–8:30). While commentators have, on the whole, interpreted the disciples’ negative characterization in this movement in terms of lack of faith and/or incomprehension, neither of these, nor a combination of the two, fully accounts for the severity of language leveled against the disciples by the narrator (6:52) and Jesus (8:17–18). Taking as its starting point an argument by Jeffrey B. Gibson (1986) that the harshness of Jesus’ rebuke in Mark 8:14–21 is occasioned not by the disciples’ lack of faith or incomprehension but by their active resistance to his Gentile mission, this investigation uncovers additional examples of the disciples’ resistance to Gentile mission, offering a better account of their negative portrayal within the Sea Crossing movement and helping explain many of their other failures.
In short, this study argues that in Mark 4:1–8:26, the disciples are characterized as resistant to Jesus’ Gentile mission and to their participation in that mission, the chief consequence being that they are rendered incapable of recognizing Jesus’ vocational identity as Israel’s Messiah (Thesis A). This leads to a secondary thesis, namely, that in Mark 8:27–30, Peter’s recognition of Jesus’ messianic identity indicates that the disciples have finally come to accept Jesus’ Gentile mission and their participation in it (Thesis B).
“Chapter One: Introduction” offers a selective review of scholarly treatments of the Markan disciples, which shows that few scholars attribute resistance, let alone purposeful resistance, to the disciples.
“Chapter Two: The Rhetoric of Repetition” introduces the methodological tools, concepts, and perspectives employed in the study. It includes a section on narrative criticism, which focuses upon the story-as-discoursed and the implied author and reader, and a section on Construction Grammar, a branch of cognitive linguistics founded by Charles Fillmore and further developed by Paul Danove, which focuses upon semantic and narrative frames and case frame analysis.
“Chapter Three: The Sea Crossing Movement, Mark 4:1–8:30” addresses the question of Markan structure and argues that Mark 4:1–8:30 comprises a single, unified, narrative movement, whose action and plot is oriented to the Sea of Galilee and whose most distinctive feature is the network of sea crossings that transport Jesus and his disciples back and forth between Jewish and Gentile geopolitical spaces.
Following William Freedman, “Chapter Four: The Literary Motif” introduces two criteria (frequency and avoidability) for determining objectively what constitutes a literary motif and provides the methodological basis and starting point for the analyses performed in chapters five and six.
“Chapter Five: The Sea Crossing Motif” establishes and then carries out a lengthy narrative analysis of the Sea Crossing motif, which is oriented around Mark’s use of θάλασσα (thalassa) and πλοῖον (ploion), and “Chapter Six: The Loaves Motif” does the same for The Loaves motif, oriented around Mark’s use of ἄρτος (artos).
Finally, “Chapter Seven: The Narrative Logic of the Disciples (In)comprehension” draws together all narrative, linguistic, and exegetical insights of the previous chapters and offers a single coherent reading of the Sea Crossing movement that establishes Theses A and B.
Do disrupt: change the status quo : or become it, a book by Mark Shayler
Full text linkRecensão crítica à obra de Mark Shaler, "Do disrupt: change the status quo : or become it", 2015“Do Disrupt” is a cute and small self-help book. Most of its ideas aren´t exactly new – the reader probably as heard most of them. However, my guess is that readers would gain from hearing those ideas once more. Plus, the author makes a god job in presenting those ideas in a fresh and beautiful way.
Mark Shayler is an environmental consultant. His main focus is to help develop ideas and implement them. So far this his first book.info:eu-repo/semantics/publishedVersio
Rapid optimal work extraction from a quantum-dot information engine
Full text linkThe conversion of thermal energy into work is usually more efficient in the slow-driving regime, where the power output is vanishingly small. Efficient work extraction for fast-driving protocols remains an outstanding challenge at the nanoscale, where fluctuations play a significant role. In this Letter, we use a quantum-dot Szilard engine to extract work from thermal fluctuations with maximum efficiency over two decades of driving speed. We design and implement a family of optimized protocols ranging from the slow- to the fast-driving regime, and we measure the engine's efficiency as well as the mean and variance of its power output in each case. These optimized protocols exhibit significant improvements in power and efficiency compared to the naive approach. Our results also show that, when optimizing for efficiency, boosting the power output of a Szilard engine inevitably comes at the cost of increased power fluctuations
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