The Physics of Mental Energy: Nonequilibrium Brain Dynamics
Explore the physics of mental energy and nonequilibrium brain dynamics. Learn how entropy production and time-reversibility define alertness versus exhaustion.
Best quote from The Physics of Mental Energy: Nonequilibrium Brain Dynamics
For a brain to be conscious and complex, it must be in a nonequilibrium steady state; that 'invigorated' feeling is literally the feeling of your brain successfully pushing back against the second law of thermodynamics.
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Physics and how they apply to neurology. Changing energy patterns from tired to invigorated. The practical applications of algebra, trigonometry, and calculus.
Frequently Asked Questions
The physics of mental energy is rooted in nonequilibrium brain dynamics. When you are alert and invigorated, your brain operates in a nonequilibrium stationary state, much like a fountain with constant energy flow. This state requires a continuous pump of energy to maintain its shape and function. In contrast, feeling tired or exhausted represents a shift toward equilibrium, where the brain's energy flow slows down and moves toward a more stagnant, basin-like state.
Being mentally 'on' or invigorated means your brain is actively producing more entropy and breaking symmetry in time. This process is a hallmark of nonequilibrium brain dynamics, where the brain is fighting against the 'heat death' of equilibrium. High entropy production indicates a high level of neural activity and energy flow, which distinguishes a focused, engaged mind from one that is experiencing a mid-afternoon slump or general mental fatigue.
Time-reversibility refers to how neural activity looks when viewed forward versus backward. In a state of rest or exhaustion, brain activity becomes more time-reversible, meaning the patterns would look similar if played in reverse. However, when the brain is in a nonequilibrium stationary state—characterized by high mental energy—it breaks this symmetry. This lack of time-reversibility is a physical indicator that the brain is actively processing information and maintaining a high-energy, invigorated state.
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From Columbia University alumni built in San Francisco
"Instead of endless scrolling, I just hit play on BeFreed. It saves me so much time."
"I never knew where to start with nonfiction—BeFreed’s book lists turned into podcasts gave me a clear path."
"Perfect balance between learning and entertainment. Finished ‘Thinking, Fast and Slow’ on my commute this week."
"Crazy how much I learned while walking the dog. BeFreed = small habits → big gains."
"Reading used to feel like a chore. Now it’s just part of my lifestyle."
"Feels effortless compared to reading. I’ve finished 6 books this month already."
"BeFreed turned my guilty doomscrolling into something that feels productive and inspiring."
"BeFreed turned my commute into learning time. 20-min podcasts are perfect for finishing books I never had time for."
"BeFreed replaced my podcast queue. Imagine Spotify for books — that’s it. 🙌"
"It is great for me to learn something from the book without reading it."
"The themed book list podcasts help me connect ideas across authors—like a guided audio journey."
"Makes me feel smarter every time before going to work"
"Instead of endless scrolling, I just hit play on BeFreed. It saves me so much time."
"I never knew where to start with nonfiction—BeFreed’s book lists turned into podcasts gave me a clear path."
"Perfect balance between learning and entertainment. Finished ‘Thinking, Fast and Slow’ on my commute this week."
"Crazy how much I learned while walking the dog. BeFreed = small habits → big gains."
"Reading used to feel like a chore. Now it’s just part of my lifestyle."
"Feels effortless compared to reading. I’ve finished 6 books this month already."
"BeFreed turned my guilty doomscrolling into something that feels productive and inspiring."
"BeFreed turned my commute into learning time. 20-min podcasts are perfect for finishing books I never had time for."
"BeFreed replaced my podcast queue. Imagine Spotify for books — that’s it. 🙌"
"It is great for me to learn something from the book without reading it."
"The themed book list podcasts help me connect ideas across authors—like a guided audio journey."
"Makes me feel smarter every time before going to work"
"Instead of endless scrolling, I just hit play on BeFreed. It saves me so much time."
"I never knew where to start with nonfiction—BeFreed’s book lists turned into podcasts gave me a clear path."
"Perfect balance between learning and entertainment. Finished ‘Thinking, Fast and Slow’ on my commute this week."
"Crazy how much I learned while walking the dog. BeFreed = small habits → big gains."
"Reading used to feel like a chore. Now it’s just part of my lifestyle."
"Feels effortless compared to reading. I’ve finished 6 books this month already."
"BeFreed turned my guilty doomscrolling into something that feels productive and inspiring."
"BeFreed turned my commute into learning time. 20-min podcasts are perfect for finishing books I never had time for."
"BeFreed replaced my podcast queue. Imagine Spotify for books — that’s it. 🙌"
"It is great for me to learn something from the book without reading it."
"The themed book list podcasts help me connect ideas across authors—like a guided audio journey."
"Makes me feel smarter every time before going to work"
