It is widely believed that the microscopic, that is, atomic-scale or smaller, world is governed by quantum mechanics while the macroscopic world, where our direct and daily experiences reside, is governed by classical mechanics. But why? Why do we not observe quantum phenomena such as quantum tunneling and quantum superposition in the macroscopic world? Where is the boundary between the microscopic and macroscopic worlds when it comes to the governing physical principles? Macroscopic quantum phenomena were first examined theoretically by A. Leggett in the 1970s. This boldly audacious idea was experimentally demonstrated in a series of groundbreaking works on Josephson junctions by John Clarke, Michel Devoret, and John Martinis in 1985, that have been celebrated by the 2025 Nobel Prize in Physics. The trio’s work spurred the development of various qubit types based on superconducting circuits, ultimately leading to the current advancement of superconducting quantum computers.It is widely believed that the microscopic, that is, atomic-scale or smaller, world is governed by quantum mechanics while the macroscopic world, where our direct and daily experiences reside, is governed by classical mechanics. But why? Why do we not observe quantum phenomena such as quantum tunneling and quantum superposition in the macroscopic world? Where is the boundary between the microscopic and macroscopic worlds when it comes to the governing physical principles? Macroscopic quantum phenomena were first examined theoretically by A. Leggett in the 1970s. This boldly audacious idea was experimentally demonstrated in a series of groundbreaking works on Josephson junctions by John Clarke, Michel Devoret, and John Martinis in 1985, that have been celebrated by the 2025 Nobel Prize in Physics. The trio’s work spurred the development of various qubit types based on superconducting circuits, ultimately leading to the current advancement of superconducting quantum computers.

Physics and High TechnologyDec 23, 20250 citations

Quantum Tunnelling of a Macroscopic Variable

Anthony J. Leggett

Modern problems in condensed matter sciencesJan 1, 19929 citations

Quantum Tunneling Confirmed: 2025 Nobel Validates Macroscopic Quantum Universality — E8 Intelligence Research

Andrew Stewart Caldin

FINDING: 2025 Nobel Prize in Physics confirms macroscopic quantum tunneling and the universality of quantum behavior, with MIT single-photon experiments validating quantum theory at fundamental scales. MATH: Quantum tunneling probability $T \approx e^{-2\kappa L}$ where $\kappa = \sqrt{2m(V_0-E)}/\hbar$ ; macroscopic tunneling extends this to collective many-body wavefunctions. Single-photon experiments confirm $\Delta x \Delta p \geq \hbar/2$ and Born rule $P = |\psi|^2$ with no deviation. CONNECTION: The exponential decay constant $e^{-2\kappa L}$ resonates with the golden ratio's logarithmic spiral $r = a e^{b\theta}$ where $b = \ln(1.618)/\theta$ — both are exponential scaling laws. The tunneling barrier width-to-decay relationship mirrors the 0.618/0.382 division in harmonic systems (barrier penetration vs. reflection). No explicit base-60 or crystallographic symmetry claimed in these sources, but the universality of quantum laws suggests underlying Author: Andrew Stewart Caldin, Independent Researcher, UK. Part of the E8 Intelligence Research series. Platform: e8intelligence.comFINDING: 2025 Nobel Prize in Physics confirms macroscopic quantum tunneling and the universality of quantum behavior, with MIT single-photon experiments validating quantum theory at fundamental scales. MATH: Quantum tunneling probability $ T \approx e^{-2\kappa L} $ where $ \kappa = \sqrt{2m(V_0-E)}/\hbar $; macroscopic tunneling extends this to collective many-body wavefunctions. Single-photon experiments confirm $ \Delta x \Delta p \geq \hbar/2 $ and Born rule $ P = |\psi|^2 $ with no deviation. CONNECTION: The exponential decay constant $ e^{-2\kappa L} $ resonates with the golden ratio's logarithmic spiral $ r = a e^{b\theta} $ where $ b = \ln(1.618)/\theta $ — both are exponential scaling laws. The tunneling barrier width-to-decay relationship mirrors the 0.618/0.382 division in harmonic systems (barrier penetration vs. reflection). No explicit base-60 or crystallographic symmetry claimed in these sources, but the universality of quantum laws suggests underlying Author: Andrew Stewart Caldin, Independent Researcher, UK. Part of the E8 Intelligence Research series. Platform: e8intelligence.com

Sep 9, 20260 citations

T \approx e^{-2\kappa L}

where

\kappa = \sqrt{2m(V_0-E)}/\hbar

; macroscopic tunneling extends this to collective many-body wavefunctions. Single-photon experiments confirm

\Delta x \Delta p \geq \hbar/2

and Born rule

P = |\psi|^2

with no deviation. CONNECTION: The exponential decay constant

e^{-2\kappa L}

resonates with the golden ratio's logarithmic spiral

r = a e^{b\theta}

where

b = \ln(1.618)/\theta

— both are exponential scaling laws. The tunneling barrier width-to-decay relationship mirrors the 0.618/0.382 division in harmonic systems (barrier penetration vs. reflection). No explicit base-60 or crystallographic symmetry claimed in these sources, but the universality of quantum laws suggests underlying Author: Andrew Stewart Caldin, Independent Researcher, UK. Part of the E8 Intelligence Research series. Platform: e8intelligence.com