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Recent extended formulations of the Wigner's friend thought experiment throw the measurement problem of quantum mechanics into sharper relief. Here I respond to an invitation by Renner to provide a consistent and concrete set of rules for…

Quantum Physics · Physics 2021-07-07 Joseph M. Renes

Since a few years, the Schr\"odinger problem captures the attention of a growing community of mathematicians interested in optimal transport problems. The first result of existence of a solution to this problem dates back to 1940, when…

Probability · Mathematics 2019-05-01 Christian Léonard

When we try to search for extraterrestrial life and intelligence, we have to follow some guidelines. The first step is to clarify what is to be meant by "Life" and "intelligence", i.e. an attempt to define these words. The word "definition"…

History and Philosophy of Physics · Physics 2011-12-06 Jean Schneider

In this study, we have proposed a method based on non-equilibrium effects to generate the superposition of macroscopically distinguishable quantum states, known as Schrodinger cat states, by using a Mach-Zehnder interferometry type…

Quantum Physics · Physics 2020-06-24 Arash Tirandaz , Hamid Reza Naeij , Afshin Shafiee

The central focus is on clarifying the distinction between sets and proper classes. To this end we identify several categories of concepts (surveyable, definite, indefinite), and we attribute the classical set theoretic paradoxes to a…

History and Overview · Mathematics 2011-12-30 Nik Weaver

We demonstrate an exact equivalence between classical population dynamics and Lindbladian evolution admitting a dark state and obeying a set of certain local symmetries. We then introduce {\em quantum population dynamics} as models in which…

Statistical Mechanics · Physics 2025-02-12 Foster Thompson , Alex Kamenev

In our daily life experiences we face localized objects which are "here or there" not "here and there". The state of a cat could be "dead and alive" at the same time from a quantum mechanical point of view, which is not in agreement with…

Quantum Physics · Physics 2013-11-26 Alireza Poostindouz , Vahid Salari , Hamidreza Mohammadi

In this article, we consider the nonlinear Schr\"odinger equation on the cylinder $\mathbb{R}^d\times \mathbb{T}$. In the long range case, we show there is no linear scattering state of the nonlinear Schr\"odinger equation on $\mathbb{R}^d…

Analysis of PDEs · Mathematics 2024-05-17 Xing Cheng , Jiqiang Zheng

The standard claim that the Schr\"odinger and Heisenberg pictures of quantum mechanics are equivalent rests on the fact that they yield identical empirical predictions. This equivalence therefore assumes the instrumentalist worldview in…

Quantum Physics · Physics 2025-10-03 Charles Alexandre Bédard

In this paper, we present a paradox arising from the acceptance of the Law of Excluded Middle (LEM) within classical mathematics. Specifically, we construct a nonzero analytic function on a connected open subset of the complex plane whose…

General Mathematics · Mathematics 2025-02-26 Babak Jabbar Nezhad

Parallel worlds are imaginative ideas in quantum mechanics and cosmology. The superpositions of parallel worlds are novel states of quantum gravity and have no classical correspondences generally. In this letter, we investigate the…

Quantum Physics · Physics 2021-11-02 Yu-Qing Cui , Tian-Ming Zhao , Rong-Xin Miao , Jin-Dong Wang , Huanyang Chen

Although quantum mechanics is a mature theory, fundamental problems discussed during its time of foundation have remained with us to this day. These problems are centered on the problematic relation between the quantum and classical worlds.…

Quantum Physics · Physics 2007-05-23 G. B. Lesovik , A. V. Lebedev , G. Blatter

This is a philosophical paper. It claims that there is a gap to be filled in the relationship between complexity theory (CT) and quantum theory (QT). This gap concerns two very distinct understandings of time. The paper provides the ground…

History and Philosophy of Physics · Physics 2016-11-23 Carlos Eduardo Maldonado

The possibility of quantum interference of a composite object with many internal degrees of freedom is studied, such that the internal degrees play a role of an internal environment. In particular, if the internal degrees have a capacity…

Quantum Physics · Physics 2015-06-19 H. Nikolic

Even as we understand for long that the world is quantal and buried in it is classical dynamics which is chaotic, finding eigenfunctions analytically from the the Schroedinger equation has turned out to be a near-impossibility. Here, we…

Chaotic Dynamics · Physics 2007-05-23 Sudhir R. Jain , Benoit Gremaud , Avinash Khare

We use an argument by Page to exhibit a paradox in the global description of the multiverse: the overwhelming majority of observers arise from quantum fluctuations and not by conventional evolution. Unless we are extremely atypical, this…

High Energy Physics - Theory · Physics 2010-10-27 Raphael Bousso , Ben Freivogel

The Gedankenexperiment advanced by Frauchiger and Renner in their "Nature" paper was based on an implicit assumption that one can synchronize stochastic measurement intervals between two non-interacting systems. This hypothesis, the author…

Quantum Physics · Physics 2023-07-18 P. B. Lerner

In this paper we prove the following: (1) The basic error of time-dependent perturbation theory is using the sum of first finite order of perturbed solutions to substitute the exact solution in the divergent interval of the series for…

General Physics · Physics 2007-05-23 Z. Junhao

This is an analysis of the recently published article `Quantum theory cannot consistently describe the use of itself' by D. Frauchiger and R. Renner~\cite{1}. Here I decipher the paradox and analyze it from the point of view of de…

Quantum Physics · Physics 2018-12-13 Aurélien Drezet

A classical probabilistic explanation for Hardy's quantum paradox is demonstrated.

Quantum Physics · Physics 2011-09-07 J. F. Geurdes
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