Viscosity and diffusion in life processes and tuning of fundamental constants

Abstract

Viewed as one of the grandest questions in modern science, understanding fundamental physical constants has been discussed in high-energy particle physics, astronomy and cosmology. Here, I review how condensed matter and liquid physics gives new insights into fundamental constants and their tuning. This is based on two observations: first, cellular life and the existence of observers depend on viscosity and diffusion. Second, the lower bound on viscosity and upper bound on diffusion are set by fundamental constants, and I briefly review this result and related recent developments in liquid physics. I will subsequently show that bounds on viscosity, diffusion and the newly introduced fundamental velocity gradient in a biochemical machine can all be varied while keeping the fine-structure constant and the proton-to-electron mass ratio intact. This implies that it is possible to produce heavy elements in stars but have a viscous planet where all liquids have very high viscosity (for example that of tar or higher) and where life may not exist. Knowing the range of bio-friendly viscosity and diffusion, we will be able to calculate the range of fundamental constants which favor cellular life and observers and compare this tuning with that discussed in high-energy physics previously. This invites an inter-disciplinary research between condensed matter physics and life sciences, and I formulate several questions that life science can address. I finish with a conjecture of multiple tuning and an evolutionary mechanism.

References in corpus (31)

• The fundamental constants and their variation: observational status and theoretical motivations
• Further Evidence for Cosmological Evolution of the Fine Structure Constant
• Varying constants, Gravitation and Cosmology
• Mean field theory of hard sphere glasses and jamming
• Indications of a spatial variation of the fine structure constant
• Dark Energy from Mass Varying Neutrinos
• Spatial variation in the fine-structure constant -- new results from VLT/UVES
• Collective modes and thermodynamics of the liquid state
• Why the Universe is Just So
• The status of varying constants: a review of the physics, searches and implications
• Theory of activated-rate processes under shear with application to shear-induced aggregation of colloids
• Stringent null constraint on cosmological evolution of the proton-to-electron mass ratio
• Gapped momentum states
• Emergence and evolution of $k$-gap in spectra of liquid and supercritical states
• Minimal quantum viscosity from fundamental physical constants
• Life at the Interface of Particle Physics and String Theory
• The Constancy of the Constants of Nature: Updates
• Transition in the supercritical state of matter: experimental evidence
• High-precision limit on variation in the fine-structure constant from a single quasar absorption system
• Universal law for the vibrational density of states of liquids
• Search for a drifting proton--electron mass ratio from H${}_2$
• Making better sense of quantum mechanics
• The Degree of Fine-Tuning in our Universe -- and Others
• Relaxation and vibrational properties in metal alloys and other disordered systems
• Modelling of liquid internal energy and heat capacity over a wide pressure-temperature range from first principles
• Exact Universal Chaos, Speed Limit, Acceleration, Planckian Transport Coefficient, "Collapse" to equilibrium, and Other Bounds in Thermal Quantum Systems
• Constants and Variations: From Alpha to Omega
• Fundamental Constant Observational Bounds on the Variability of the QCD Scale
• Properties of condensed matter from fundamental physical constants
• Constraints on fundamental physical constants from bio-friendly viscosity and diffusion
• Varying constants driven baryogenesis

Cited by in corpus (5)

• Theory of melting lines
• Revisiting the phonon theory of liquid heat capacity: low-frequency shear modes and intramolecular vibrations
• Revisiting the question of what instantaneous normal modes tell us about liquid dynamics
• Fundamental physical constants, operation of physical phenomena and entropy increase
• Generally applicable physics-based equation of state for liquids