# Weekly Papers on Quantum Foundations (38)

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PhilSci-Archive: No conditions. Results ordered -Date Deposited.

Fri Sep 16 2022 11:06:39 (22 hours)

# 1.

Jäntgen, Ina (2022) How to measure effect sizes for rational decision-making. In: UNSPECIFIED.

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physics.hist-ph updates on arXiv.org

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Martin Korth

Fri Sep 16 2022 08:51:30 (1 day)

# 2.

The tremendous advances of research into artificial intelligence as well as neuroscience made over the last two to three decades have given further support to a renewed interest into philosophical discussions of the mind-body problem. Especially the last decade has seen a revival of panpsychist and idealist considerations, often focused on solving philosophical puzzles like the so-called hard problem of consciousness. While a number of respectable philosophers advocate some sort of panpsychistic solution to the mind-body problem now, fewer advocate that idealism can contribute substantially to the debate. Interest in idealism has nevertheless risen again, as can be seen also from recent overview articles and collections of works. The working hypothesis here is that a properly formulated idealism can not only provide an alternative view of the mind/matter gap, but that this new view will also shed light on open questions in our common scientific, i.e. materialist, world view. To investigate this possibility, idealism first of all needs a model for the integration of modern science which allows for a mathematically consistent reinterpretation of the physical world as a limiting case of a both material and non-material world, which would make the outcome of idealistic considerations accessible to scientific investigation. To develop such a model I will first try to explain what I mean when I speak of a ‘scientifically tenable’ idealism, including a formulation of the emanation problem which for idealism replaces the interaction problem, then give a very brief summary of the available elements of such a theory in the philosophical literature, before sketching out some ‘design questions’ which have to be answered upon the construction of such models, and finally put forward a first model for a scientifically tenable objective idealism.

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gr-qc updates on arXiv.org

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Eduardo Velasco-Aja, Jesus Anero

Fri Sep 16 2022 08:51:26 (1 day)

# 3.

In this master thesis, the Frobenius power series method is used to find spherically symmetric and static vacuum solutions to quadratic and cubic gravitational actions, representing quantum corrections to the Einstein-Hilbert action. After a motivation to the topic and an introduction, the power series solutions are presented. After recovering the results for the quadratic action of Stelle and collaborators, we found that when the Weyl cubic operator is present, the (2,2) family of solutions is still present while the Schwarzschid-de Sitter-like (1,-1) is not.

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quant-ph updates on arXiv.org

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Scott Aaronson

Fri Sep 16 2022 08:51:22 (1 day)

# 4.

I survey, for a general scientific audience, three decades of research into which sorts of problems admit exponential speedups via quantum computers — from the classics (like the algorithms of Simon and Shor), to the breakthrough of Yamakawa and Zhandry from April 2022. I discuss both the quantum circuit model, which is what we ultimately care about in practice but where our knowledge is radically incomplete, and the so-called oracle or black-box or query complexity model, where we’ve managed to achieve a much more thorough understanding that then informs our conjectures about the circuit model. I discuss the strengths and weaknesses of switching attention to sampling tasks, as was done in the recent quantum supremacy experiments. I make some skeptical remarks about widely-repeated claims of exponential quantum speedups for practical machine learning and optimization problems. Through many examples, I try to convey the “law of conservation of weirdness,” according to which every problem admitting an exponential quantum speedup must have some unusual property to allow the amplitude to be concentrated on the unknown right answer(s).

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Kumar S. Gupta, Tajron Jurić, Anđelo Samsarov, Ivica Smolić

Fri Sep 16 2022 08:51:16 (1 day)

# 5.

We study the noncommutative corrections to the entropy of the Reissner-Nordstr\”{o}m black hole using a $\kappa$-deformed scalar probe within the brick-wall framework. The noncommutativity is encoded in an Abelian Drinfeld twist constructed from the Killing vector fields of the Reissner-Nordstr\”{o}m black hole. We show that the noncommutative effects naturally lead to a logarithmic correction to the Bekenstein-Hawking entropy even at the lowest order of the WKB approximation. In contrast, such logarithmic corrections in the commutative setup appear only after the quantum effects are included through higher order WKB corrections or through higher loop effects. Our analysis thus provides further evidence towards the hypothesis that the noncommutative framework is capable of encoding quantum effects of gravity.

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PRL: General Physics: Statistical and Quantum Mechanics, Quantum Information, etc.

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M. Lagoin, C. Crauste-Thibierge, and A. Naert

Thu Sep 15 2022 18:00:00 (1 day)

# 6.

Author(s): M. Lagoin, C. Crauste-Thibierge, and A. Naert

We present an experimental realization at macroscopic scale of the storied Brownian ratchet, which is an illustration of the Maxwell’s demon. In our mechanism, the rotation of a centimeter-scale 1D Brownian object in a granular gas is detected by an electromechanical converter (dynamo), generating a…

[Phys. Rev. Lett. 129, 120606] Published Thu Sep 15, 2022

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Nature Physics

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Anurag Anshu; Aram W. Harrow; Mehdi Soleimanifar

Thu Sep 15 2022 08:00:00 (2 days)

# 7.

Nature Physics, Published online: 15 September 2022; doi:10.1038/s41567-022-01740-7

Entanglement entropy between two parts of a quantum state generally grows with volume, but for one-dimensional and some two-dimensional ground states, it scales with area. An area law has now been proven for a related metric in any dimension or geometry.

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Nature Physics

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Enrique Rico Ortega; Simone Montangero

Thu Sep 15 2022 08:00:00 (2 days)

# 8.

Nature Physics, Published online: 15 September 2022; doi:10.1038/s41567-022-01739-0

Limits on the quantum entanglement entropy in one dimension have been a key factor in understanding the physics of many-body systems. A bound that applies in any dimension has now been derived for a different measure known as entanglement spread.

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Thu Sep 15 2022 02:48:05 (2 days)

# 9.

Calderón, Francisco (2022) The Causal Axioms of Algebraic Quantum Field Theory: A Diagnostic. In: UNSPECIFIED.

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Thu Sep 15 2022 02:47:27 (2 days)

# 10.

Tappenden, Paul (2022) Pilot-Wave Theory without Nonlocality. [Preprint]

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Thu Sep 15 2022 02:46:13 (2 days)

# 11.

Kubiak, Adam P. (2022) Perspectival Realism and Frequentist Statistics: The Case of Jerzy Neyman’s Methodology and Philosophy. In: UNSPECIFIED.

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PRL: General Physics: Statistical and Quantum Mechanics, Quantum Information, etc.

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David Schmid, Haoxing Du, John H. Selby, and Matthew F. Pusey

Wed Sep 14 2022 18:00:00 (2 days)

# 12.

Author(s): David Schmid, Haoxing Du, John H. Selby, and Matthew F. Pusey

We give a complete characterization of the (non)classicality of all stabilizer subtheories. First, we prove that there is a unique nonnegative and diagram-preserving quasiprobability representation of the stabilizer subtheory in all odd dimensions, namely Gross’s discrete Wigner function. This repre…

[Phys. Rev. Lett. 129, 120403] Published Wed Sep 14, 2022

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PRL: General Physics: Statistical and Quantum Mechanics, Quantum Information, etc.

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Anton L. Andersen and Klaus Mølmer

Wed Sep 14 2022 18:00:00 (2 days)

# 13.

Author(s): Anton L. Andersen and Klaus Mølmer

We present a protocol for probing the state of a quantum system by its resonant coupling and entanglement with a meter system. By continuous measurement of a time evolving meter observable, we infer the evolution of the entangled systems and, ultimately, the state and dynamics of the system of inter…

[Phys. Rev. Lett. 129, 120402] Published Wed Sep 14, 2022

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Wed Sep 14 2022 07:10:03 (3 days)

# 14.

Thebault, Karim P Y (2022) Big Bang Singularity Resolution In Quantum Cosmology. [Preprint]

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Jae Sung Lee, Sangyun Lee, Hyukjoon Kwon, and Hyunggyu Park

Tue Sep 13 2022 18:00:00 (3 days)

# 15.

Author(s): Jae Sung Lee, Sangyun Lee, Hyukjoon Kwon, and Hyunggyu Park

Landauer’s bound is the minimum thermodynamic cost for erasing one bit of information. As this bound is achievable only for quasistatic processes, finite-time operation incurs additional energetic costs. We find a tight finite-time Landauer’s bound by establishing a general form of the classical spe…

[Phys. Rev. Lett. 129, 120603] Published Tue Sep 13, 2022

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Nahuel Freitas and Massimiliano Esposito

Tue Sep 13 2022 18:00:00 (3 days)

# 16.

Author(s): Nahuel Freitas and Massimiliano Esposito

Maxwell’s demons work by rectifying thermal fluctuations. They are not expected to function at macroscopic scales where fluctuations become negligible and dynamics become deterministic. We propose an electronic implementation of an autonomous Maxwell’s demon that indeed stops working in the regular …

[Phys. Rev. Lett. 129, 120602] Published Tue Sep 13, 2022

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Felix Ahnefeld, Thomas Theurer, Dario Egloff, Juan Mauricio Matera, and Martin B. Plenio

Tue Sep 13 2022 18:00:00 (3 days)

# 17.

Author(s): Felix Ahnefeld, Thomas Theurer, Dario Egloff, Juan Mauricio Matera, and Martin B. Plenio

Shor’s factoring algorithm provides a superpolynomial speedup over all known classical factoring algorithms. Here, we address the question of which quantum properties fuel this advantage. We investigate a sequential variant of Shor’s algorithm with a fixed overall structure and identify the role of …

[Phys. Rev. Lett. 129, 120501] Published Tue Sep 13, 2022

arXiv:2209.05344 (physics)[Submitted on 10 Jul 2022]

Order-of-magnitude test of a theory of the Mott problem

Jonathan F. Schonfeld

The Mott problem asks: Is there a microscopic physical mechanism – based (explicitly or implicitly) only on Schroedinger’s equation – that explains why a single alpha particle emitted in a single spherically symmetric s-wave nuclear decay produces a manifestly non-spherically-symmetric single track in a cloud chamber? This is a variant of the more general quantum measurement problem. Earlier, we proposed such a mechanism, drawing on quantum-mechanical Coulomb scattering and the thermal behavior of supersaturated vapors. Our analysis implied that, in a large enough sample, the probability that a track originates at distance R from the decay source is proportional to 1/R^2, with a proportionality constant which we expressed in terms of more fundamental parameters involving diverse physical processes, but were unable to estimate at the time. More recently, we tested the 1/R^2 law opportunistically using pedagogical cloud chamber video posted on the Internet. In the present paper, we draw on the chemical physics literature for an independent estimate of the proportionality constant. The estimate is rough, but within about 1.7 orders of magnitude (factor of 50) of a rough value that we derive directly from the video data. Given the crudeness of the experimental data, the roughness of the numerical estimates, and the extreme spread of concentrations involved (air molecules vs. subcritical vapor clusters of specific sizes), we view this level of agreement as significant, at this stage in the theory’s development.