43 found
Order:
Disambiguations
Christian Wüthrich [41]C. WuthriCh [2]Ch Wüthrich [1]
See also
Christian Wüthrich
University of Geneva
  1. Emergent Spacetime and Empirical (in)Coherence.Nick Huggett & Christian Wüthrich - 2013 - Studies in History and Philosophy of Modern Physics 44 (3):276-285.
    Numerous approaches to a quantum theory of gravity posit fundamental ontologies that exclude spacetime, either partially or wholly. This situation raises deep questions about how such theories could relate to the empirical realm, since arguably only entities localized in spacetime can ever be observed. Are such entities even possible in a theory without fundamental spacetime? How might they be derived, formally speaking? Moreover, since by assumption the fundamental entities cannot be smaller than the derived and so cannot ‘compose’ them in (...)
    Direct download (8 more)  
     
    Export citation  
     
    Bookmark   51 citations  
  2.  37
    Spacetime is as Spacetime Does.Vincent Lam & Christian Wüthrich - 2018 - Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 64:39-51.
    Theories of quantum gravity generically presuppose or predict that the reality underlying relativistic spacetimes they are describing is significantly non-spatiotemporal. On pain of empirical incoherence, approaches to quantum gravity must establish how relativistic spacetime emerges from their non-spatiotemporal structures. We argue that in order to secure this emergence, it is sufficient to establish that only those features of relativistic spacetimes functionally relevant in producing empirical evidence must be recovered. In order to complete this task, an account must be given of (...)
    Direct download (8 more)  
     
    Export citation  
     
    Bookmark   12 citations  
  3. Time Travel and Time Machines.Chris Smeenk & Christian Wuthrich - 2009 - In Craig Callender (ed.), The Oxford Handbook of Philosophy of Time. Oxford: Oxford University Press. pp. 577-630.
    This paper is an enquiry into the logical, metaphysical, and physical possibility of time travel understood in the sense of the existence of closed worldlines that can be traced out by physical objects. We argue that none of the purported paradoxes rule out time travel either on grounds of logic or metaphysics. More relevantly, modern spacetime theories such as general relativity seem to permit models that feature closed worldlines. We discuss, in the context of Gödel's infamous argument for the ideality (...)
    Direct download (4 more)  
     
    Export citation  
     
    Bookmark   18 citations  
  4. No Categorial Support for Radical Ontic Structural Realism.Vincent Lam & Christian Wüthrich - 2015 - British Journal for the Philosophy of Science 66 (3):605-634.
    Radical ontic structural realism (ROSR) asserts an ontological commitment to ‘free-standing’ physical structures understood solely in terms of fundamental relations, without any recourse to relata that stand in these relations. Bain ([2013], pp.1621–35) has recently defended ROSR against the common charge of incoherence by arguing that a reformulation of fundamental physical theories in category-theoretic terms (rather than the usual set-theoretic ones) offers a coherent and precise articulation of the commitments accepted by ROSR. In this essay, we argue that category theory (...)
    Direct download (9 more)  
     
    Export citation  
     
    Bookmark   12 citations  
  5.  68
    The Structure of Causal Sets.Christian Wüthrich - 2012 - Journal for General Philosophy of Science / Zeitschrift für Allgemeine Wissenschaftstheorie 43 (2):223-241.
    More often than not, recently popular structuralist interpretations of physical theories leave the central concept of a structure insufficiently precisified. The incipient causal sets approach to quantum gravity offers a paradigmatic case of a physical theory predestined to be interpreted in structuralist terms. It is shown how employing structuralism lends itself to a natural interpretation of the physical meaning of causal set theory. Conversely, the conceptually exceptionally clear case of causal sets is used as a foil to illustrate how a (...)
    Direct download (8 more)  
     
    Export citation  
     
    Bookmark   17 citations  
  6. Challenging the Spacetime Structuralist.Christian Wuthrich - 2009 - Philosophy of Science 76 (5):1039-1051.
    Structural realist interpretations of generally relativistic spacetimes have recently come to enjoy a remarkable degree of popularity among philosophers. I present a challenge to these structuralist interpretations that arises from considering cosmological models in general relativity. As a consequence of their high degree of spacetime symmetry, these models resist a structuralist interpretation. I then evaluate the various strategies available to the structuralist to react to this challenge. †To contact the author, please write to: Department of Philosophy, 9500 Gilman Drive, 0119, (...)
    Direct download (11 more)  
     
    Export citation  
     
    Bookmark   21 citations  
  7. Do the Laws of Physics Forbid the Operation of Time Machines?John Earman, Chris Smeenk & Christian Wüthrich - 2009 - Synthese 169 (1):91 - 124.
    We address the question of whether it is possible to operate a time machine by manipulating matter and energy so as to manufacture closed timelike curves. This question has received a great deal of attention in the physics literature, with attempts to prove no- go theorems based on classical general relativity and various hybrid theories serving as steps along the way towards quantum gravity. Despite the effort put into these no-go theorems, there is no widely accepted definition of a time (...)
    Direct download (13 more)  
     
    Export citation  
     
    Bookmark   13 citations  
  8.  11
    Do the Laws of Physics Forbid the Operation of Time Machines?John Earman, Christopher Smeenk & Christian Wuthrich - 2009 - Synthese 169 (1):91-124.
    We address the question of whether it is possible to operate a time machine by manipulating matter and energy so as to manufacture closed timelike curves. This question has received a great deal of attention in the physics literature, with attempts to prove no- go theorems based on classical general relativity and various hybrid theories serving as steps along the way towards quantum gravity. Despite the effort put into these no-go theorems, there is no widely accepted definition of a time (...)
    No categories
    Direct download (7 more)  
     
    Export citation  
     
    Bookmark   18 citations  
  9. The Fate of Presentism in Modern Physics.Christian Wuthrich - 2011 - In Roberto Ciuni, Kristie Miller & Giuliano Torrengo (eds.), New Papers on the Present--Focus on Presentism. Philosophia Verlag.
    Defining ‘presentism’ in a way that saves it from being trivially false yet metaphysically substantively distinct from eternalism is no mean feat, as the first part of this collection testifies. In Wuthrich (forthcoming), I have offered an attempt to achieve just this, arguing that this is best done in the context of modern spacetime theories. Here, I shall refrain from going through all the motions again and simply state the characterization of an ersatzist version of presentism as it has emerged (...)
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark   11 citations  
  10.  20
    Can the World Be Shown to Be Indeterministic After All?Christian Wuthrich - 2010 - In Claus Beisbart & Stephan Hartmann (eds.), Probabilities in Physics. Oxford University Press. pp. 365--389.
    This essay considers and evaluates recent results and arguments from classical chaotic systems theory and non-relativistic quantum mechanics that pertain to the question of whether our world is deterministic or indeterministic. While the classical results are inconclusive, quantum mechanics is often assumed to establish indeterminism insofar as the measurement process involves an ineliminable stochastic element, even though the dynamics between two measurements is considered fully deterministic. While this latter claim concerning the Schrödinger evolution must be qualified, the former fully depends (...)
    Direct download (3 more)  
     
    Export citation  
     
    Bookmark   13 citations  
  11. To Quantize or Not to Quantize: Fact and Folklore in Quantum Gravity.Christian Wuthrich - 2004 - Philosophy of Science 72 (5):777-788.
    Does the need to find a quantum theory of gravity imply that the gravitational field must be quantized? Physicists working in quantum gravity routinely assume an affirmative answer, often without being aware of the metaphysical commitments that tend to underlie this assumption. The ambition of this article is to probe these commitments and to analyze some recently adduced arguments pertinent to the issue of quantization. While there exist good reasons to quantize gravity, as this analysis will show, alternative approaches to (...)
    Direct download (10 more)  
     
    Export citation  
     
    Bookmark   19 citations  
  12.  21
    What Becomes of a Causal Set?Christian Wüthrich & Craig Callender - 2016 - British Journal for the Philosophy of Science:axv040.
    Unlike the relativity theory it seeks to replace, causal set theory has been interpreted to leave space for a substantive, though perhaps ‘localized’, form of ‘becoming’. The possibility of fundamental becoming is nourished by the fact that the analogue of Stein’s theorem from special relativity does not hold in causal set theory. Despite this, we find that in many ways, the debate concerning becoming parallels the well-rehearsed lines it follows in the domain of relativity. We present, however, some new twists (...)
    Direct download (4 more)  
     
    Export citation  
     
    Bookmark   4 citations  
  13. No Presentism in Quantum Gravity.Christian Wüthrich - 2010 - In Vesselin Petkov (ed.), Space, Time, and Spacetime: Physical and Philosophical Implications of Minkowski's Unification of Space and Time. Springer.
    This essay offers a reaction to the recent resurgence of presentism in the philosophy of time. What is of particular interest in this renaissance is that a number of recent arguments supporting presentism are crafted in an untypically naturalistic vein, breathing new life into a metaphysics of time with a bad track record of co-habitation with modern physics. Against this trend, the present essay argues that the pressure on presentism exerted by special relativity and its core lesson of Lorentz symmetry (...)
    Direct download (3 more)  
     
    Export citation  
     
    Bookmark   9 citations  
  14.  41
    What We Cannot Learn From Analogue Experiments.Karen Crowther, Niels S. Linnemann & Christian Wüthrich - 2019 - Synthese:1-26.
    Analogue experiments have attracted interest for their potential to shed light on inaccessible domains. For instance, ‘dumb holes’ in fluids and Bose–Einstein condensates, as analogues of black holes, have been promoted as means of confirming the existence of Hawking radiation in real black holes. We compare analogue experiments with other cases of experiment and simulation in physics. We argue—contra recent claims in the philosophical literature—that analogue experiments are not capable of confirming the existence of particular phenomena in inaccessible target systems. (...)
    Direct download (4 more)  
     
    Export citation  
     
    Bookmark   1 citation  
  15.  53
    The (A)Temporal Emergence of Spacetime.Nick Huggett & Christian Wüthrich - 2018 - Philosophy of Science 85 (December):1190-1203.
    This paper examines two cosmological models of quantum gravity to investigate the foundational and conceptual issues arising from quantum treatments of the big bang. While the classical singularity is erased, the quantum evolution that replaces it may not correspond to classical spacetime: it may instead be a non-spatiotemporal region, which somehow transitions to a spatiotemporal state. The different kinds of transition involved are partially characterized, the concept of a physical transition without time is investigated, and the problem of empirical incoherence (...)
    Direct download (7 more)  
     
    Export citation  
     
    Bookmark   1 citation  
  16.  45
    Time in Quantum Gravity.Nick Huggett, Tiziana Vistarini & Christian Wuthrich - 2012 - .
    Quantum gravity--the marriage of quantum physics with general relativity--is bound to contain deep and important lessons for the nature of physical time. Some of these lessons shall be canvassed here, particularly as they arise from quantum general relativity and string theory and related approaches. Of particular interest is the question of which of the intuitive aspects of time will turn out to be fundamental, and which 'emergent' in some sense.
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark   6 citations  
  17.  95
    What Becomes of a Causal Set.Christian Wüthrich & Craig Callender - 2017 - British Journal for the Philosophy of Science 68 (3):907-925.
    ABSTRACT Unlike the relativity theory it seeks to replace, causal set theory has been interpreted to leave space for a substantive, though perhaps ‘localized’, form of ‘becoming’. The possibility of fundamental becoming is nourished by the fact that the analogue of Stein’s theorem from special relativity does not hold in CST. Despite this, we find that in many ways, the debate concerning becoming parallels the well-rehearsed lines it follows in the domain of relativity. We present, however, some new twists and (...)
    Direct download (6 more)  
     
    Export citation  
     
    Bookmark   2 citations  
  18.  9
    Are Black Holes About Information?Christian Wuthrich - unknown
    Information theory presupposes the notion of an epistemic agent, such as a scientist or an idealized human. Despite that, information theory is increasingly invoked by physicists concerned with fundamental physics, physics at very high energies, or generally with the physics of situations in which even idealized epistemic agents cannot exist. In this paper, I shall try to determine the extent to which the application of information theory in those contexts is legitimate. I will illustrate my considerations using the case of (...)
    No categories
    Direct download (4 more)  
     
    Export citation  
     
    Bookmark   2 citations  
  19. Demarcating Presentism.Christian Wuthrich - 2010 - In Henk de Regt, Samir Okasha & Stephan Hartmann (eds.), EPSA Philosophy of Science: Amsterdam 2009. Springer. pp. 441--450.
    This paper argues that recent arguments to the effect that the debate between presentism and eternalism lacks any metaphysical substance ultimately fail, although important lessons can be gleaned from them in how to formulate a non-vacuous version of presentism. It suggests that presentism can best be characterized in the context of spacetime theories. The resulting position is an ersatzist version of presentism that admits merely non-present entities as abstracta deprived of physical existence. Ersatzist presentism both escapes the charges of triviality (...)
    Direct download (4 more)  
     
    Export citation  
     
    Bookmark   3 citations  
  20.  13
    Time Machines.John Earman & Christian Wüthrich - 2010 - In .
    Recent years have seen a growing consensus in the philosophical community that the grandfather paradox and similar logical puzzles do not preclude the possibility of time travel scenarios that utilize spacetimes containing closed timelike curves. At the same time, physicists, who for half a century acknowledged that the general theory of relativity is compatible with such spacetimes, have intensely studied the question whether the operation of a time machine would be admissible in the context of the same theory and of (...)
    Direct download (3 more)  
     
    Export citation  
     
    Bookmark   3 citations  
  21. Metaphysics in Contemporary Physics.Tomasz Bigaj & Christian Wüthrich (eds.) - 2015 - Brill | Rodopi.
    The book _Metaphysics in Contemporary Physics_ offers various perspectives on the relation and mutual influence between modern physical theories and analytic metaphysics.
    No categories
     
    Export citation  
     
    Bookmark   1 citation  
  22.  11
    Take a Ride on a Time Machine.John Earman, Christopher Smeenk & Christian Wuthrich - unknown
    We discuss the possibility to build and operate a time machine, a device that produces closed timelike curves. We specify the spacetime structure needed to implement a time machine and assess attempted no-go results against time machines in classical general relativity, semi-classical quantum gravity, quantum field theory on curved spacetime, and in Euclidean quantum gravity. Such no-go theorems for time machines would show that, under physically reasonable conditions, CTCs cannot develop in spacetimes initially free of these pathologies. Our review indicates (...)
    No categories
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark   4 citations  
  23.  43
    A Quantum-Information-Theoretic Complement to a General-Relativistic Implementation of a Beyond-Turing Computer.Christian Wüthrich - 2015 - Synthese 192 (7):1989-2008.
    There exists a growing literature on the so-called physical Church-Turing thesis in a relativistic spacetime setting. The physical Church-Turing thesis is the conjecture that no computing device that is physically realizable can exceed the computational barriers of a Turing machine. By suggesting a concrete implementation of a beyond-Turing computer in a spacetime setting, Istvan Nemeti and Gyula David have shown how an appreciation of the physical Church-Turing thesis necessitates the confluence of mathematical, computational, physical, and indeed cosmological ideas. In this (...)
    Direct download (6 more)  
     
    Export citation  
     
    Bookmark   1 citation  
  24.  67
    Metaphysics and Science.Christian Wüthrich - 2017 - Philosophical Review 126 (1):136-140.
  25. Is Science Without Spacetime Possible?Nick Huggett & Christian Wuthrich - unknown
    Numerous approaches to a quantum theory of gravity posit fundamental ontologies that exclude spacetime, either partially or wholly. This situation raises deep questions about how such theories could relate to the empirical realm, since arguably only entities localized in spacetime can ever be observed. Are such entities even possible in a theory without fundamental spacetime? How might they be derived, formally speaking? Moreover, since the fundamental entities can't be smaller than the derived by assumption and so can't 'compose' them in (...)
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark  
  26.  15
    Quantum Gravity From General Relativity.Christian Wuthrich - forthcoming - In Eleanor Knox & Alastair Wilson (eds.), Routledge Companion to the Philosophy of Physics. Routledge.
    Although general relativity is a predictively successful theory, it treats matter as classical rather than as quantum. For this reason, it will have to be replaced by a more fundamental quantum theory of gravity. Attempts to formulate a quantum theory of gravity suggest that such a theory may have radical consequences for the nature, and indeed the fate, of spacetime. The present article articulates what this problem of spacetime is and traces it three approaches to quantum gravity taking general relativity (...)
    No categories
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark  
  27. A Twist in the Geometry of Rotating Black Holes: Seeking the Cause of Acausality.Christian Wüthrich, Hajnal Andréka & István Németi - manuscript
    We investigate Kerr–Newman black holes in which a rotating charged ring-shaped singularity induces a region which contains closed timelike curves (CTCs). Contrary to popular belief, it turns out that the time orientation of the CTC is oppo- site to the direction in which the singularity or the ergosphere rotates. In this sense, CTCs “counter-rotate” against the rotating black hole. We have similar results for all spacetimes sufficiently familiar to us in which rotation induces CTCs. This motivates our conjecture that perhaps (...)
     
    Export citation  
     
    Bookmark   1 citation  
  28.  28
    When the Actual World is Not Even Possible.Christian Wuthrich - unknown
    Approaches to quantum gravity often involve the disappearance of space and time at the fundamental level. The metaphysical consequences of this disappearance are profound, as is illustrated with David Lewis's analysis of modality. As Lewis's possible worlds are unified by the spatiotemporal relations among their parts, the non-fundamentality of spacetime---if borne out---suggests a serious problem for his analysis: his pluriverse, for all its ontological abundance, does not contain our world. Although the mere existence---as opposed to the fundamentality---of spacetime must be (...)
    No categories
    Direct download (5 more)  
     
    Export citation  
     
    Bookmark  
  29. A Journey Surveying the Land of Space, Time and Motion: Nick Huggett: Everywhere and Everywhen: Adventures in Physics and Philosophy. New York: Oxford University Press, 2010, 234pp, £15.99 PB.Christian Wüthrich - 2012 - Metascience 21 (2):485-488.
    A journey surveying the land of space, time and motion Content Type Journal Article Category Book Review Pages 1-4 DOI 10.1007/s11016-011-9575-8 Authors Christian Wüthrich, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0119, USA Journal Metascience Online ISSN 1467-9981 Print ISSN 0815-0796.
    Direct download (3 more)  
     
    Export citation  
     
    Bookmark  
  30. Of Modern Physics.Nick Huggett & Christian Wuthrich - 2013 - Studies in History and Philosophy of Modern Physics 44:276-285.
  31.  44
    Putnam Looks at Quantum Mechanics.Christian Wuthrich - unknown
    Hilary Putnam has argued that from a realist perspective, quantum mechanics stands in need of an interpretation. Ironically, this hypothesis may appear vulnerable against arguments drawing on Putnam's own work. Nancy Cartwright has urged that his 1962 essay on the meaning of theoretical terms suggests that quantum mechanics needs no interpretation and thus stands in tension with his claim of three years later. She furthermore contends that this conflict should be resolved in favour of the earlier work, as quantum mechanics, (...)
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark  
  32.  25
    In Search of Lost Spacetime: Philosophical Issues Arising in Quantum Gravity.Christian Wuthrich - unknown
    This paper issues a call to arms and seeks to entice the reader with some of the most captivating philosophical puzzles arising in quantum gravity. The analysis will be prefaced, in Section 1, by general considerations concerning the need for finding a quantum theory of gravity and the methods used in the pursuit of this goal. After mapping the field in Section 2, loop quantum gravity is introduced as an important competitor and particularly rich source of philosophical trouble in Section (...)
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark  
  33.  11
    Nick Bostrom: Anthropic Bias: Observation Selection Effects in Science and Philosophy. [REVIEW]Christian Wüthrich - 2004 - Philosophy of Science 71 (2):230-232.
  34. Generic Incomparability of Infinite-Dimensional Entangled States.Christian Wüthrich, Rob Clifton & Brian Hepburn - 2002 - Physics Letters A 303:121-124.
    In support of a recent conjecture by Nielsen (1999), we prove that the phenomena of ‘incomparable entanglement’— whereby, neither member of a pair of pure entangled states can be transformed into the other via local operations and classical communication (LOCC)—is a generic feature when the states at issue live in an infinite-dimensional Hilbert space.  2002 Elsevier Science B.V. All rights reserved.
    Translate
     
     
    Export citation  
     
    Bookmark  
  35.  35
    Helena Eilstein (Ed.), A Collection of Polish Works on Philosophical Problems of Time and Spacetime.Christian Wüthrich - 2004 - Erkenntnis 60 (2):265-270.
  36.  9
    Tian Yu Cao. From Current Algebra to Quantum Chromodynamics: A Case for Structural Realism. Cambridge: Cambridge University Press, 2010. Pp. X+308. $85.00. [REVIEW]Christian Wüthrich - 2014 - Hopos: The Journal of the International Society for the History of Philosophy of Science 4 (2):368-371.
  37.  7
    Asymmetry of Slip and Shape Changes During Cyclic Deformation of Α-Iron Single Crystals.H. Mughrabi & Ch Wüthrich - 1976 - Philosophical Magazine 33 (6):963-984.
    No categories
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark  
  38.  12
    Katherine Brading and Elena Castellani (Eds.), Symmetries in Physics: Philosophical Reflections, Cambridge University Press, Cambridge, ISBN 0521821371, 2003, (Pp. Xii +445, £65, US$ 100, Hardback). [REVIEW]C. WuthriCh - 2005 - Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 36 (3):576-582.
  39. Thinking About Space and Time.Claus Beisbart, Tilman Sauer & Christian Wüthrich (eds.) - forthcoming - Birkhäuser.
    No categories
     
    Export citation  
     
    Bookmark  
  40. Metaphysics and Science (Tentative Title).T. Bigaj & C. Wuthrich (eds.) - forthcoming - Poznan Studies.
    No categories
     
    Export citation  
     
    Bookmark  
  41.  4
    A Collection of Polish Works on Philosophical Problems of Time and Spacetime.Christian Wüthrich - 2002
    Direct download (2 more)  
     
    Export citation  
     
    Bookmark  
  42. Philosophy Beyond Spacetime.Christian Wüthrich, Baptiste Le Bihan & Nick Huggett (eds.) - forthcoming - Oxford: Oxford University Press.
    No categories
     
    Export citation  
     
    Bookmark  
  43. Beyond Spacetime: The Philosophical Foundations of Quantum Gravity.Christian Wüthrich & Nick Huggett (eds.) - forthcoming - Cambridge University Press..
    No categories
     
    Export citation  
     
    Bookmark