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Scientist

Alan Guth

1947–present · cosmology, theoretical physics
American theoretical physicist, creator of the inflationary model of the universe, which explains the large-scale homogeneity and flatness of the universe, and also generates the initial perturbations that led to the formation of galaxies.

Biography

He studied at the Massachusetts Institute of Technology, and worked at Princeton, Columbia, and Stanford universities, as well as at MIT. He was awarded the Dirac Medal and other prizes.

Key discoveries

💡 Guth came up with inflation when he was 32 years old, and the idea came to him while listening to a lecture on problems in cosmology.
"He referred to the inflationary model as the 'free lunch' theory because it allows a huge universe to arise almost from nothing."
Concepts
inflationbig bang
Laws
Friedmann equations
Scientists
Arno PenziasRalph AlpherStephen HawkingEdwin HubbleFred HoyleGeorges LemaîtreGeorge GamowBrian Schmidt

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Hurricane Energy Follows a Power Law
A forest fire has no "typical" size: a small grass burn and a firestorm covering thousands of hectares are part of the same phenomenon. The same goes for tropical cyclones: the energy they release over their lifetime does not cluster around some average value. Instead, it follows a power law, and this rule holds across all of Earth's oceans.
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Mesoscale2010-01-222 minarXiv:1001.4048express
Diamond memory for a quantum processor
A superconducting qubit, a tiny loop with zero resistance, crunches problems faster than you can blink. But cut the power, and everything it has calculated vanishes. Like a chef who cooks without writing down the recipe: as long as he's at the stove, he remembers every step, but an hour later — nothing. The authors of the study propose writing the result into diamond.
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Quantum Physics2011-10-132 minarXiv:1110.2978express
Quantum Memory in Diamond
A tiny diamond with defects, nitrogen atoms that replaced carbon, hides an unusual feature. Around each defect, an extra electron spins like a top that can be tilted by radio pulses. On its own, this top is too quiet to reach a superconducting qubit — an artificial atom operating at temperatures colder than outer space.
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Geophysics2012-12-272 minarXiv:1212.6394
The Salt Chronicle of the Messinian Crisis
A rock chronicle where each layer is a page, and spectral analysis reads the rhythm of the lines. In the Realmonte salt mine in Sicily, geologists measured the thickness of 120 three-part cycles: a millimeter-scale clay parting, a thin anhydrite or polyhalite layer, and then a decimeter-scale halite bed.
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Edwin HubbleVera RubinAdam Riesslarge-scale structure
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High Energy2013-03-252 minarXiv:1303.6118
Fingerprints in the Spectrum: Pulsars vs. Dark Matter
The cosmic electron spectrum is like fingerprints at a crime scene. Particles arriving from the depths of the Galaxy carry in their energies the traces of those that produced them. For a long time, the picture was blurred: instruments with wide energy bins, like out-of-focus photographs, did not reveal details.
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Alan GuthAlbert EinsteinCharles Townespulsarcosmic rays
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Atmospheric and Oceanic Physics2013-08-212 minarXiv:1308.4630
Wind Without a Mean: Why Correlations in the McMurdo Dry Valleys Fail
In a room with a hundred people, you can measure each person's height and compute the average. But if someone infinitely tall walks in, the average height ceases to exist: no matter how many more people you add, the sum grows without bound.
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Quantum Physics2014-05-122 minarXiv:1405.2831
Quantum Simulator: A Bridge Under Stress Testing
In 1982, physicist Richard Feynman proposed a simple idea: to understand a quantum system, you need to build another quantum system that behaves the same way. Thus was born the quantum simulator, a device that does not calculate equations but reproduces them in its own behavior.
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Atmospheric and Oceanic Physics2014-10-293 minarXiv:1410.8081
The Po Valley Air Orchestra: How Global Rhythms Conduct Temperatures Up to 20 Kilometers
Twice a day, at eleven in the morning and eleven at night, a white balloon with an instrument rises into the sky from a tiny station in San Pietro Capofiume, just eleven meters above sea level. Over twenty-two years, more than sixteen thousand such launches have recorded how air temperature changes with altitude: from the warm ground to the thin cold at twenty kilometers.
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Atomic Physics2015-06-193 minarXiv:1506.05979
Light as a Conductor: How Lasers Make Atoms Dance in Unison
In a dark room, a laser beam draws a bright spot on the wall. Light seems warm and uncontrollable, but for three decades physicists have used it as a conductor's baton, making atoms dance in unison.
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Statistical Mech2016-01-083 minarXiv:1601.01978
Percolation as a Precursor to Transition
In 1988, the surface temperature of the Pacific Ocean began to change long before meteorologists declared the onset of El Niño. Points on the map scattered along the equator started behaving in concert: if water warmed in one place, it did so in a neighboring one too.
Victor Rodriguez-Mendez·Victor M. Eguiluz·Emilio Hernandez-Garcia·Jose J. Ramasco
Ludwig BoltzmannAlbert EinsteinAlan GuthPhase transition
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Atmospheric and Oceanic Physics2016-04-143 minarXiv:1604.04050
Breathing of Tropical Rains: How El Niño Phases Drive Precipitation Extremes
In 1998, the Pacific Ocean off the coast of Peru suddenly cooled, and tropical rains seemed to take a deep breath. Wet zones, where more than three meters of water falls in a year, crept westward, while dry patches, where less than two hundred millimeters accumulate, expanded off the coasts of Australia and the Americas.
Jai Sukhatme·V. Venugopal
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Atmospheric and Oceanic Physics2016-07-062 minarXiv:1607.01529
Who Really Warms the Planet: The Information Trail of Climate Drivers
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HEP Theory2018-06-212 minarXiv:1806.08362
The String Theory Swampland: Why de Sitter Vacua Don't Live Here
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Mesoscale2018-08-272 minarXiv:1808.09043express
Quantum Tangles: How to Spot an Invisible Connection
A stone falls into water, and ripples spread outward. In the quantum world, a magnetic impurity (that pebble) in a metal perturbs the surrounding electrons, and they form a special cloud around it. This is called the Kondo cloud. Like ripples on water in the dark, it long remained elusive.
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Quantum Physics2018-11-052 minarXiv:1811.01693express
Chilling the Quantum Brain
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stat.ME2019-04-052 minarXiv:1904.02855
How to Make Your Model Pay for Its Mistakes
A translator who jumps at every rustle in the hall starts mixing up words by the end of the meeting. Their confidence in being right grows, while their accuracy drops. That is roughly how poorly calibrated probabilistic forecasts behave: the model claims a high probability for an event, but reality disagrees.
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Atmospheric and Oceanic Physics2019-09-093 minarXiv:1909.03789
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Quantum Physics2019-09-252 minarXiv:1909.11775express
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Atmospheric and Oceanic Physics2020-03-281 minarXiv:2003.12867
Tug-of-War in the Tropics: How Seasonal Air Oscillations Drive El Niño
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Atmospheric and Oceanic Physics2020-04-142 minarXiv:2004.06628
South Atlantic Pulse Predicts Indian Monsoon Five Months Ahead
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Atmospheric and Oceanic Physics2021-02-032 minarXiv:2102.02192
Two barometers showing different weather
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Instrumentation2021-09-202 minarXiv:2109.09637express
Hunting Celestial Flashes
Deep in the Siberian taiga, there are a hundred light traps: each about the size of a small table, but together they cover a square kilometer. At night, these traps gaze at the sky, catching faint flashes of light born when cosmic particles slam into the atmosphere. The setup is called TAIGA-HiSCORE, and it usually works as a giant "eye" for such particles.
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stat.ME2021-12-093 minarXiv:2112.04843
The Uneven Pulse of Time: How Irregular Measurement Rhythms Skew Conclusions and What to Do About It
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stat.ME2022-05-192 minarXiv:2205.09252
Breaking Point in the Flow of Functions
A seismograph records underground tremors: the smooth line suddenly jerks and changes its character. Similarly, functional data, such as ocean temperature maps or brain signals, may shift their shape at some point. The new algorithm FSBS catches such breakpoints, even when each curve is measured at only one point and noise drowns the signal.
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Quantum Physics2023-05-062 minarXiv:2305.03967express
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Quantum entanglement is like an invisible spring between particles — squeeze one, and the other twitches, no matter where it is. In the new work, physicists built a model of four spins (tiny magnetic arrows) in a chain, where the end spins are held by a local magnetic field.
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High Energy2023-06-232 minarXiv:2306.13406express
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Quantum Physics2023-10-242 minarXiv:2310.15936
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econ.GN2023-11-273 minarXiv:2311.16370
Climate, Harvest, and Post-Harvest Conflict
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HEP Theory2024-01-153 minarXiv:2401.07645
Two Horizons, One Thermometer: How Quantum Fields Erase Temperature Differences
Two vessels of water at different temperatures are separated by a thin partition. As long as the partition is intact, each vessel lives its own life: in one, the water is hot; in the other, it's icy. But once the partition is removed, the temperatures begin to equalize, and eventually both vessels reach the same state.
E. T. Akhmedov·P. A. Anempodistov·K. V. Bazarov
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Atmospheric and Oceanic Physics2024-05-033 minarXiv:2405.02471
Two Seismographs on One Shore: How Ice Cores Hear Different Oceans
On the coast of Dronning Maud Land, two ice cores stand like two seismographs on one shore. One, FK17, was drilled on the crest of the Lokenryggen ice rise; the other, TIR18, on the crest of Hammaryggen. A hundred kilometers apart, they catch different tremors of the climate. One hears the Pacific, the other the Atlantic and Indian Oceans.
Stéphane Vannitsem·David Docquier·Sarah Wauthy·Matthew Corkill·Jean-Louis Tison
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Instrumentation and Detectors2024-08-282 minarXiv:2408.16037
A Wide-Angle Lens for the Subatomic World
At Jefferson Lab, electrons are accelerated to 12 GeV and smash into protons to pry out their secrets. But existing detectors are like cameras with a narrow field of view: you either see a lot but dimly, or brightly but only a tiny patch. Electron scattering is the main tool, but statistics are insufficient for subtle effects.
Zein-Eddine Meziani
Alan GuthAlbert EinsteinBarry BarishLIGOelectron scattering
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Exoplanets2024-10-022 minarXiv:2410.01625
The Invisible Conductor of the Super-Puff Planet System
The three planets in the Kepler-51 system have long intrigued astronomers: they are Saturn-sized but less dense than water. These 'super-puff' worlds, with masses no more than ten Earths, are like cosmic dandelions — massive yet almost weightless. Their orbits are arranged like musicians in an orchestra, each playing its part, beating the rhythm with transits.
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Law of Universal GravitationKepler's third lawEdwin HubbleVera RubinAdam Riesslarge-scale structureexoplanet
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High Energy2024-10-092 minarXiv:2410.06510
X-ray shell reveals supernova explosion in microquasar SS 433
North of the microquasar SS 433, an arc has emerged in the soft X-ray band. Faint and diffuse, yet stubbornly tracing contours already familiar from radio observations. Astronomers studied its spectrum and saw gas heated to eleven million kelvin. Gas that could not have been heated by the jets or the accretion disk wind.
Yi-Heng Chi·Jiahui Huang·Ping Zhou·Hua Feng·Xiang-Dong Li·Sera B. Markoff·Samar Safi-Harb·Laura Olivera-Nieto
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Quantum Physics2024-10-162 minarXiv:2410.12660
An Orchestra of Every Note: How Classical Machines Play Quantum Music
In 2023, a group of researchers at Oak Ridge National Laboratory ran a simulation of a 61-qubit quantum circuit on the Theta supercomputer. Storing its state vector would have required 32 exabytes of memory, more than the total capacity of all hard drives on the planet. But thanks to data compression, they fit it into 768 terabytes.
Alessio Cicero·Mohammad Ali Maleki·Muhammad Waqar Azhar·Anton Frisk Kockum·Pedro Trancoso
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Quantum Physics2024-11-254 minarXiv:2411.16633
Brake and Gas on One Pedal: How Weak Measurements Protect Quantum Batteries from Discharge
A quantum battery is not a box of electrolyte but a handful of atoms or superconducting loops, with energy stored in excited states. It can be charged in fractions of a second using collective quantum effects.
André H. A. Malavazi·Rishav Sagar·Borhan Ahmadi·Pedro R. Dieguez
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Optics2024-11-293 minarXiv:2412.00271
A String That Never Goes Out of Tune: Higher Modes Hold Light in the Resonator
Tuning a string: higher harmonics help hold the pitch without drowning out the fundamental note. In an optical microcavity, a tiny resonator made of two mirrors, light bounces between the reflective surfaces, and any jitter in the spacing knocks it off resonance.
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Quantum Physics2025-01-091 minarXiv:2501.05598express
Quantum Networks: How Optical Switches Link Processors
A single quantum processor is like a solo musician. It can play a simple tune, but a symphony requires an orchestra. To solve problems that demand enormous computational power, processors must be networked.
Hassan Shapourian·Eneet Kaur·Troy Sewell·Jiapeng Zhao·Michael Kilzer·Ramana Kompella·Reza Nejabati
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Stellar2025-01-213 minarXiv:2501.12478
Fast Stars as Probes of the Galaxy
The Solar System takes 210 million years to complete one orbit around the center of the Milky Way. The last time we were on this same side of the Galaxy, early dinosaurs were roaming the Earth. That number, 243.72 km/s, has now been refined thanks to rare stars that streak through the Galaxy like cannonballs.
W. H. Elsanhoury
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Quantum Physics2025-04-072 minarXiv:2504.05353express
Teleporting Energy Through Time
A postal money order doesn't arrive instantly but after a set delay, and the amount credited to the recipient's account ends up larger than what the sender deposited in cash. That's roughly how the new protocol, dubbed temporal quantum energy teleportation (TQET), works. In ordinary quantum energy teleportation, two parties, Alice and Bob, share a common quantum state.
Kazuki Ikeda
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Quantum Physics2025-04-153 minarXiv:2504.10938
A Robot Traffic Cop for Quantum Gates
A quantum computer is an orchestra where every qubit must come in exactly on cue. But instead of a conductor with a baton, we have an arbitrary waveform generator (AWG) that delivers microwave signals lasting tens of nanoseconds.
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