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Sat Jul 29 2023 05:55:19 (3 hours)

# 1.

Tyszka, Apoloniusz (2023) The predicate of the current mathematical knowledge substantially increases the constructive mathematics what is impossible for the empirical sciences. [Preprint]

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Rüdiger Schack

Fri Jul 28 2023 11:08:12 (21 hours)

# 2.

Following earlier work by Michel Bitbol (Bitbol 2020) and Laura de la Tremblaye (de La Tremblaye 2020) which examines QBism from the perspective of phenomenology, this short paper explores points of contact between QBism and Maurice Merleau-Ponty’s essay The intertwining — the chiasm.

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Stephen L. Adler

Fri Jul 28 2023 11:08:03 (21 hours)

# 3.

I review the basic ideas of “trace dynamics”, as formulated in my 2004 Cambridge University Press book “Quantum Theory as an Emergent Phenomenon”, and then discuss how they have influenced much of my work of the last two decades.

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Sarath Raman Nair, Shilu Tian, Gavin K. Brennen, Sougato Bose, Jason Twamley

Fri Jul 28 2023 11:08:01 (21 hours)

# 4.

Macroscopic quantum superpositions of massive objects are deeply interesting as they have a number of potential applications ranging from the exploration of the interaction of gravity with quantum mechanics to quantum sensing, quantum simulation, and computation. In this letter, we propose two related schemes to prepare a spatial superposition of massive quantum oscillator systems with high Q-factor via a superposition of magnetic forces. In the first method, we propose a large spatial superposition of a levitated spherical magnet generated via magnetic forces applied by adjacent flux qubits. We find that in this method the spatial superposition extent ($\Delta z$) is independent of the size of the particle. In the second method, we propose a large spatial superposition of a magnetically levitated (using the Meissner effect) flux qubit, generated via driving the levitated qubit inductively. In both schemes, we show that ultra-large superpositions $\Delta z/\delta z_{\rm zpm}\sim 10^6$, are possible, where $\delta z_{\rm zpm}$ is the zero point motional extent.

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Jai-chan Hwang, Hyerim Noh

Fri Jul 28 2023 11:08:00 (21 hours)

# 5.

In curved spacetime, Maxwell’s equations can be expressed in forms valid in Minkowski background, with the effect of the metric (gravity) appearing as effective polarizations and magnetizations. The electric and magnetic (EM) fields depend on the observer’s frame four-vector. We derive Maxwell’s equations valid in general curved spacetime using the fields defined in the normal frame, the coordinate frame, and two other non-covariant methods used in the literature. By analyzing the case in the generic frame we show that the EM fields, as well as the charge and current densities, defined in non-covariant ways do not correspond to physical ones measured by an observer. We show that modification of the homogeneous part is inevitable to any observer, and such a modification is difficult to interpret as the effective medium property. The normal frame is the relevant one to use as it gives the EM fields measured by an Eulerian observer.

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Fri Jul 28 2023 05:36:31 (1 day)

# 6.

Lazarovici, Dustin (2023) Why the Book of Nature is Written in the Language of Mathematics. [Preprint]

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Thu Jul 27 2023 02:44:31 (2 days)

# 7.

Wolf, William J. and Read, James (2023) Respecting Boundaries: Theoretical Equivalence and Structure Beyond Dynamics. [Preprint]

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Kevin Slagle and John Preskill

Wed Jul 26 2023 18:00:00 (2 days)

# 8.

Author(s): Kevin Slagle and John Preskill

We formulate a model in which quantum mechanics emerges from classical mechanics. Given a local Hamiltonian � acting on � qubits, we define a local classical model with an additional spatial dimension whose boundary dynamics is approximately—but to arbitrary precision—described by Schrödinger’s equa…

[Phys. Rev. A 108, 012217] Published Wed Jul 26, 2023

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Wed Jul 26 2023 02:30:49 (3 days)

# 9.

Chua, Eugene Y. S. and Chen, Eddy Keming (2023) Decoherence, Branching, and the Born Rule in a Mixed-State Everettian Multiverse. [Preprint]

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João V. B. da Silva, Gabriel H. S. Aguiar, and George E. A. Matsas

Mon Jul 24 2023 18:00:00 (4 days)

# 10.

Author(s): João V. B. da Silva, Gabriel H. S. Aguiar, and George E. A. Matsas

The main goal of this paper is to provide some insight into how promising the Schrödinger-Newton equation would be to explain the emergence of classicality. Based on the similarity of the Newton and Coulomb potentials, we add an electric self-interacting term to the Schrödinger-Newton equation for t…

[Phys. Rev. A 108, 012214] Published Mon Jul 24, 2023

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Sun Jul 23 2023 01:29:49 (6 days)

# 11.

Lahiri, Avijit (2023) Quantum Mechanical Reality: Entanglement and Decoherence. [Preprint]