main tags laws scientists sections authors graph theory
Popular

Jacob Bekenstein

! scientist · # tag · @ author
1947–2015 · theoretical physics, gravitation
Israeli-Mexican theoretical physicist who created the foundations of black hole thermodynamics. As a graduate student at Princeton, he risked suggesting that black holes possess entropy proportional to the horizon area, thus connecting general relativity and quantum mechanics. His ideas, initially rejected by Hawking, led to the joint formulation of Bekenstein-Hawking entropy.

Biography

Born in Mexico City, the family moved to Israel. He studied at the Technion (Haifa), then at Princeton University under the guidance of John Wheeler. Professor at the Hebrew University of Jerusalem. Winner of the Wolf Prize in Physics, the Israel Prize. His ideas contributed to the development of the holographic principle.

Key discoveries

💡 The idea of black hole entropy came to Bekenstein under the impression of a thought experiment involving a cup of hot tea thrown into a black hole. His advisor John Wheeler supported him, saying: "You have made a huge mistake, and you will be condemned for it, but I want you to be wrong with me."
Quote: "Black holes are not eternal prisons, as previously thought. Things can get out of a black hole both outward and possibly into another universe."
Links in the knowledge graph 1
Related tags
black holeentropygravityspacetime curvature
Related laws
Hawking radiationBekenstein-Hawking entropyholographic principleHawking area theorem
Related scientists
Robert HookeFritz ZwickySubrahmanyan ChandrasekharRainer WeissStephen HawkingKarl SchwarzschildJoseph WeberEmmy Noether

Related articles

Gravitational Waves to Test the Quantum Graininess of Space

The Generalized Uncertainty Principle (GUP) posits that space is made of quantum 'pixels.' This feature acted as dark energy in the early universe, and today it influences galaxy formation and leaves a trace in gravitational waves. New observatories will be able to measure this effect.
arXiv:2502.10043 · 2025-02-14

Black Holes Like Boiling Water

Some black holes behave like water that can boil and condense. Quantum effects complicate the picture but don't break the underlying pattern. This brings us closer to understanding spacetime at the micro level.
arXiv:2507.21663 · 2025-07-29

Black Mirrors: How Gravitational Waves Will Reveal Black Hole Twins

One reflects, the other swallows. Black holes and black mirrors alter the music of gravitational waves, and future detectors will tell them apart by the rhythm of falling stars.
arXiv:2508.13272 · 2025-08-18

How Information Gives Birth to Particles from Nothing

Physicists have derived formulas proving: when quantum ties are broken, the vacuum responds by birthing matter. The calculations hold for acceleration, black holes, and radioactive decay. Information is no longer a shadow of reality — it's its architect.
arXiv:2508.17067 · 2025-08-23

Black Holes Remember Everything: Memory Burden Alters Their Oscillations

Scientists have theoretically demonstrated that the information accumulated by a black hole (its “memory burden”) affects its oscillations under external perturbations. Two black holes of identical mass but with different information loads emit different gravitational wave spectra. This discovery pr
arXiv:2509.22540 · 2025-09-26

Black Hole as a Cosmic Cooking Pot: New Theory Reveals Its 'Kitchen' Secrets

Physicists have described black holes using string theory: it turns out these giants obey equations familiar from the behavior of water. By changing pressure and temperature, you can make a black hole 'boil' or 'condense', and at extreme cold — even 'freeze'. Thus, a cosmic object becomes a testing
arXiv:2511.18407 · 2025-11-23

Time is not a river, but a one-way street

Scientists have proven: black holes and wormholes cannot turn back time. These cosmic “detours” merely redistribute disorder, but the total chaos in the Universe keeps growing. That’s the relentless arrow of time.
arXiv:2512.03380 · 2025-12-03

Black holes behave like boiling water

Using a new mathematical approach in gravity equations, scientists obtained an unusual type of charged black holes. Their thermodynamics strikingly resembles the behavior of water boiling: a critical point was found, and the ratio of pressure, volume, and temperature at it is constant. This brings t
arXiv:2512.19200 · 2025-12-22

Gravity Without Dark Matter: The Entropic Approach Triumphs

Analysis of star motions in 23 dwarf galaxies showed that emergent gravity — a theory explaining attraction through the information capacity of space — is more accurate than modified Newtonian dynamics. The result with a confidence of 5.2σ casts doubt on the existence of dark matter.
arXiv:2601.01715v1 · 2026-01-05

The Universe is a Giant Heat Engine

Scientists have shown that the expanding universe can be described by the same equations as a steam engine. They calculated the efficiency of this 'cosmic motor' and confirmed: even the universe cannot break the laws of thermodynamics.
arXiv:2601.01851 · 2026-01-05

How Weak Gravity Does Without Dark Matter

This approach rewrites gravity's rules where it's barely felt—at the edges of galaxies. Under normal conditions, it aligns with Einstein's theory, but for weak fields, it adds a tweak. The solution needs no new particles and explains why galaxies spin faster than their visible mass permits.
arXiv:2601.04290v1 · 2026-01-07

Why neural networks are like black holes: a lesson from 'bald' models

Inside language models like LLaMA lie tangled patterns, their strength depending on the training method. But to an outside observer, the model always yields the same result—much like a black hole that 'forgets' every detail of the matter it swallows. This explains why simple fine-tuning methods are
arXiv:2601.06788 · 2026-01-11

The Universe Falls Silent Smoothly, Not with a Bang

Scientists have built a model where dark energy loses its push. Instead of a shredding tear or a crunch into a point, the Universe’s expansion smoothly tapers off. The end result — a flat, table-smooth, empty space. Observations back this up.
arXiv:2601.07007v1 · 2026-01-11

Lack of Information Accelerates the Universe

Scientists have found a new explanation for why measurements of the universe's expansion rate don't match: a tiny fraction of information may be 'erased' from its visible edge. This shortage creates extra energy that slightly accelerates expansion in the last few billion years, without affecting the
arXiv:2601.17938 · 2026-01-25

Quantum Computers Will Challenge Gravity

Relativity and quantum mechanics diverge at the micro level. A new approach: if a quantum computer surpasses the classical speed limit of computation, it becomes a test of quantum gravity. A lab needs 500 logical qubits, the cosmos—1,600. Commercial roadmaps promise to reach that milestone soon.
arXiv:2604.06322 · 2026-04-07

Hawking's Area Law: How Black Holes Test Quantum Gravity

Analysis of black hole mergers confirmed Hawking's law and turned it into a selection tool: only theories without extra mathematical terms survive. Moreover, the law itself leads to the entropy formula and the idea that the horizon might not be just a smooth sphere.
arXiv:2604.18669 · 2026-04-20

Lightning over the Horizon: The Collapse of Semiclassical Gravity in Black Hole Evaporation

The information paradox of black holes requires accounting for quantum effects in strong gravity. The semiclassical approach, proposed by Stephen Hawking, assumes that quantum fields on a fixed curved background lead to radiation and mass loss, but the backreaction of radiation on geometry is a crit
arXiv:2605.00780v1 · 2026-05-01

Black Holes: Light's Hidden States

Scientists have shown: black holes, like water, switch between states. The light ring around the hole is a mirror of these transformations. Whirls of light betray its inner temperature and pressure, making the invisible visible.
arXiv:2605.02429 · 2026-05-04

Phantom Chords of Gravity: Boson Stars as Keepers of Quantum Memory

Quantum systems typically evolve toward equilibrium, losing all memory of their initial state. But occasionally, 'scars' are born — anomalously stable, weakly entangled states that challenge thermalization. New research shows that boson stars in anti-de Sitter space realize such scars, combining cha
arXiv:2605.02446v2 · 2026-05-04

Ashes of Inevitability: The Quantum Singularity of Evaporating Black Holes

The legacy of Penrose and Hawking asserted: the collapse of massive stars begets a singularity. But quantum evaporation casts doubt on the classical conditions, making us wonder if the core of a black hole is blurred by quantum fog. Engelhardt and Nagar put an end to it: by relaxing causality requir
arXiv:2605.05326v1 · 2026-05-06

Fluffy Black Holes: The Flickering Tangle and the Paradox

Fuzzball black holes replace the event horizon with a dense, reflective boundary. New calculations show that entropy islands, meant to resolve the information paradox, behave erratically: they appear and vanish. In more realistic models, they don’t appear at all, hinting at the depth of the puzzle.
arXiv:2605.08347 · 2026-05-08

Laboratory Black Holes: Playing with Temperature

Researchers studied the behavior of miniature black hole analogues built from superconductors. They found that in these systems, the dependence of temperature on internal state can be turned on and off—a feature unavailable to real black holes. This paves the way for an engineering approach to under
arXiv:2605.11046 · 2026-05-11

How Black Holes Erase Quantum Secrets

A quantum particle can be like a spinning coin—both heads and tails until observed. Near a black hole, a passing photon acts like a camera flash, forcing the particle to 'land' on one state. That photon then crosses the event horizon, adding a snapshot to the black hole's surface memory without brea
arXiv:2605.19588 · 2026-05-19

How to Measure the Chaos of Spacetime Itself

A geometric way to measure the chaos of curved spacetime: entropy is calculated as the sum of disorder of all light rays passing through a region. For a black hole, the result matches the Bekenstein–Hawking formula, revealing a connection between gravity, information, and heat.
arXiv:2605.22172 · 2026-05-21

Gravity Born from Disorder: Physicists Find a Universal Recipe

From a single entropy 'recipe,' physicists derived both Einstein's equations and a method to calculate energy at the boundaries of space—like at the edge of a black hole. The approach even works for surfaces moving at light speed, and explains why energy can vanish at boundaries. It’s a unified view
arXiv:2605.22434 · 2026-05-21

Is dark matter the remnant of evaporated black holes?

Physicists suggest that invisible dark matter is the 'salt' left behind after primordial black holes evaporated. Calculations show that if there were too many such holes, their remnants would have overfilled the cosmos. But black holes weighing about a ton naturally account for the observed amount o
arXiv:2605.28953 · 2026-05-27

Acoustic Black Holes Get Entangled Differently

Scientists modeled a flow where sound gets trapped and found that entanglement entropy grows with volume, not area. The reason: pairs of sound particles (phonons), born at the horizon, remain connected throughout the interior. This helps us understand how information might be preserved inside real b
arXiv:2605.30540 · 2026-05-28

Tunnels from Entropy: A New Key to Wormholes

Can modified entropy laws replace exotic matter for wormholes? Testing five non-standard models, physicists found each naturally generates matter with negative energy density—exactly what keeps spacetime tunnels open. This links entropic gravity theory to the prospect of interstellar travel.
arXiv:2606.00178 · 2026-05-29

Ghost Wind of the Cosmic Dawn: How Lyman-alpha Destroys Stellar Cradles

The first two-dimensional radiation-hydrodynamic simulations prove that the radiation pressure in the Lyman-alpha (Lyα) line can exceed the direct stellar light force by up to 16 times and serve as the main feedback mechanism even before the explosion of supernovae in environments poor in dust. This
arXiv:2606.02711v1 · 2026-06-01

Graviton Fog: How Quanta Blur Light Cones

The classical light cone is a crystal-clear boundary between what can be causally connected and what remains forever separated. But quantum field theory in curved spacetime paints a different picture: gravitons, the quanta of the gravitational field, tremble even in vacuum, causing spacetime itself
arXiv:2606.02729v2 · 2026-06-01

Winds of Cosmic Noon: How Quasar WISSH13 Halts Star Formation

At the peak of star formation, 12 billion years ago, quasar WISSH13 was ejecting two streams of matter at near-light speeds. Analysis of XMM-Newton and NuSTAR data revealed a cold corona and powerful reflection—a sure sign of accretion at the Eddington limit. These ultrafast winds, with kinetic powe
arXiv:2606.05312v1 · 2026-06-03

The First Cry of a Merging Black Hole Confirms Hawking's Unbreakable Law

Scientists used a new method: measuring the horizon area from short-lived direct gravitational waves emerging right after the merger, before the quasi-normal ringing. Analysis of GW250114 showed agreement with the Kerr remnant area — a direct test of the area law. This opens an independent pathway t
arXiv:2606.06592v1 · 2026-06-04

Information — The Shadow of What Never Was

What is information? Not a substance, nor an empty abstraction. Rather, it’s the shadow of all the options that never came to be. When we erase data, the shadow vanishes, releasing a tiny amount of heat. In black holes, this shadow thickens but doesn’t disappear—a puzzle leading to quantum gravity.
arXiv:2606.15120 · 2026-06-13

Vacuum’s Memory: How Information Survives in a Black Hole

A new hypothesis suggests the vacuum is a network of invisible threads. When a star collapses, the threads tangle into a dense knot—a fuzzball—whose surface imprints everything that fell in. Nature saves information from disappearing.
arXiv:2606.20334 · 2026-06-18

When a Black Hole Can Split Apart

The laws of physics forbid black holes from dividing: their total area cannot decrease, just like entropy. But rapid rotation changes the rules, allowing tiny fragments to break off. In worlds with extra dimensions, fragmentation is even easier, revealing secrets of primordial black holes.
arXiv:2606.24642 · 2026-06-23

How Black Holes Actually Glow: A Simple Discovery

What's it about: they created an analog of a black hole's event horizon in an optical fiber — a point from which light cannot escape. What's new: Hawking radiation turned out to be not an avalanche, but a single burst. Why it matters: this could explain how real black holes lose mass.
arXiv:2607.01118 · 2026-07-01

Black Holes Remember More Than You'd Think

Black holes store more information than the infalling matter provides. This excess 'information load' shifts the frequency of gravitational waves during mergers, revealing their origin—stellar or quantum.
arXiv:2607.03560 · 2026-07-03

The Forge of Black Holes: Stellar Mergers as a Source of Spin

In dense globular clusters, frequent collisions of massive stars lead to the formation of rapidly rotating blue supergiants. Simulations show that when the mass ratio of the components exceeds 0.3, the merger product does not expand into a red supergiant and retains its angular momentum. The collaps
arXiv:2607.05495v1 · 2026-07-06