•  152
    Does quantum mechanics clash with the equivalence principle—and does it matter?
    with Craig Callender
    European Journal for Philosophy of Science 1 (1): 133-145. 2011.
    With an eye on developing a quantum theory of gravity, many physicists have recently searched for quantum challenges to the equivalence principle of general relativity. However, as historians and philosophers of science are well aware, the principle of equivalence is not so clear. When clarified, we think quantum tests of the equivalence principle won’t yield much. The problem is that the clash/not-clash is either already evident or guaranteed not to exist. Nonetheless, this work does help teach…Read more
  •  96
    Less Decoherence and More Coherence in Quantum Gravity, Inflationary Cosmology and Elsewhere
    with Daniel Sudarsky
    Foundations of Physics 46 (7): 852-879. 2016.
    In Crull it is argued that, in order to confront outstanding problems in cosmology and quantum gravity, interpretational aspects of quantum theory can by bypassed because decoherence is able to resolve them. As a result, Crull concludes that our focus on conceptual and interpretational issues, while dealing with such matters in Okon and Sudarsky, is avoidable and even pernicious. Here we will defend our position by showing in detail why decoherence does not help in the resolution of foundational…Read more
  •  69
    On the Consistency of the Consistent Histories Approach to Quantum Mechanics
    with Daniel Sudarsky
    Foundations of Physics 44 (1): 19-33. 2014.
    The Consistent Histories (CH) formalism aims at a quantum mechanical framework which could be applied even to the universe as a whole. CH stresses the importance of histories for quantum mechanics, as opposed to measurements, and maintains that a satisfactory formulation of quantum mechanics allows one to assign probabilities to alternative histories of a quantum system. It further proposes that each realm, that is, each set of histories to which probabilities can be assigned, provides a valid q…Read more
  •  66
    The Black Hole Information Paradox and the Collapse of the Wave Function
    with Daniel Sudarsky
    Foundations of Physics 45 (4): 461-470. 2015.
    The black hole information paradox arises from an apparent conflict between the Hawking black hole radiation and the fact that time evolution in quantum mechanics is unitary. The trouble is that while the former suggests that information of a system falling into a black hole disappears, the latter implies that information must be conserved. In this work we discuss the current divergence in views regarding the paradox, we evaluate the role that objective collapse theories could play in its resolu…Read more
  •  62
    Ever since the early days of quantum mechanics it has been suggested that consciousness could be linked to the collapse of the wave function. However, no detailed account of such an interplay is usually provided. In this paper we present an objective collapse model where the collapse operator depends on integrated information, which has been argued to measure consciousness. By doing so, we construct an empirically adequate scheme in which superpositions of conscious states are dynamically suppre…Read more
  •  55
    Measurements according to Consistent Histories
    with Daniel Sudarsky
    Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 48 (1): 7-12. 2014.
    We critically evaluate the treatment of the notion of measurement in the Consistent Histories approach to quantum mechanics. We find such a treatment unsatisfactory because it relies, often implicitly, on elements external to those provided by the formalism. In particular, we note that, in order for the formalism to be informative when dealing with measurement scenarios, one needs to assume that the appropriate choice of framework is such that apparatuses are always in states of well defined poi…Read more
  •  31
    Black Holes, Information Loss and the Measurement Problem
    with Daniel Sudarsky
    Foundations of Physics 47 (1): 120-131. 2017.
    The information loss paradox is often presented as an unavoidable consequence of well-established physics. However, in order for a genuine paradox to ensue, not-trivial assumptions about, e.g., quantum effects on spacetime, are necessary. In this work we will be explicit about these additional, speculative assumptions required. We will also sketch a map of the available routes to tackle the issue, highlighting the, often overlooked, commitments demanded of each alternative. Finally, we will disp…Read more
  •  30
    On the status of conservation laws in physics: Implications for semiclassical gravity
    with Tim Maudlin and Daniel Sudarsky
    Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics. forthcoming.
  •  22
    The Consistent Histories formalism and the measurement problem
    with Daniel Sudarsky
    Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 52 (Part B): 217-222. 2015.
    In response to a recent rebuttal of Okon and Sudarsky presented in Griffiths, we defend the claim that the Consistent Histories formulation of quantum mechanics does not solve the measurement problem. In order to do so, we argue that satisfactory solutions to the problem must not only not contain anthropomorphic terms at the fundamental level, but also that applications of the formalism to concrete situations should not require any input not contained in the description of the situation at hand …Read more
  •  18
    Losing Stuff Down a Black Hole
    with Daniel Sudarsky
    Foundations of Physics 48 (4): 411-428. 2018.
    Over the years, the so-called black hole information loss paradox has generated an amazingly diverse set of proposals. However, 40 years after the introduction of Hawking’s radiation, there continues to be a debate regarding whether the effect does, in fact, lead to an actual problem. In this paper we try to clarify some aspect of the discussion by describing two possible perspectives regarding the landscape of the information loss issue. Moreover, we advance a fairly conservative point of view …Read more
  •  16
    We put forward a proposal that combines objective collapse models, developed in connection with quantum-foundational questions, with the so-called Weyl curvature hypothesis, introduced by Roger Penrose as an attempt to account for the very special initial state of the universe. In particular, we explain how a curvature dependence of the collapse rate in such models, an idea already shown to help in the context of black holes and information loss, could also offer a dynamical justification for Pe…Read more
  •  15
    Can gravity account for the emergence of classicality?
    with Yuri Bonder and Daniel Sudarsky
    Physical Review D 92. 2015.
    A recent debate has ensued over the claim in Pikovski et al. that systems with internal degrees of freedom undergo a universal, gravity-induced, type of decoherence that explains their quantum-to-classical transition. Such decoherence is supposed to arise from the different gravitational redshifts experienced by such systems when placed in a superposition of two wave packets at different heights in a gravitational field. Here we investigate some aspects of the discussion with the aid of simple e…Read more
  •  12
    Inspired by possible connections between gravity and foundational question in quantum theory, we consider an approach for the adaptation of objective collapse models to a general relativistic context. We apply these ideas to a list of open problems in cosmology and quantum gravity, such as the emergence of seeds of cosmic structure, the black hole information issue, the problem of time in quantum gravity and, in a more speculative manner, to the nature of dark energy and the origin of the very s…Read more
  •  7
    Wigner's convoluted friends
    with R. Muciño
    Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 72 87-90. 2020.
  • El principio de equivalencia en gravedad cuántica
    Metatheoria – Revista de Filosofía E Historia de la Ciencia 3 65--80. 2013.