642 citations · 3k across the 35 of their papers we have counts for
37 papers
The sounds of science a symphony for many instruments and voices part II
Gerard t Hooft, William D Phillips, Anton Zeilinger +22
Despite its amazing quantitative successes and contributions to revolutionary technologies, physics currently faces many unsolved mysteries ranging from the meaning of quantum mech…
Black Hole Firewalls and Quantum Mechanics
Gerard t Hooft
Firewalls in black holes are easiest to understand by imposing time reversal invariance, together with a unitary evolution law. The best approach seems to be to split up the time s…
Quantum gravity on the black hole horizon
Nava Gaddam, Nico Groenenboom, Gerard 't Hooft
We study scattering on the black hole horizon in a partial wave basis, with an impact parameter of the order of the Schwarzschild radius or less. This resembles the strong gravity…
The firewall transformation for black holes and some of its implications
Gerard t Hooft
A promising strategy for better understanding space and time at the Planck scale, is outlined and further pursued. It is explained in detail, how black hole unitarity demands the e…
The Good, the Bad, and the Ugly of Gravity and Information
Gerard 't Hooft, Steven B. Giddings, Carlo Rovelli +4
Various contenders for a complete theory of quantum gravity are at odds with each other. This is in particular seen in the ways they relate to information and black holes, and how…
Reflections on the renormalization procedure for gauge theories
Gerard t Hooft
Various pieces of insight were needed to formulate the rules for working with gauge theories of the electro-magnetic, weak and strong forces. First, it was needed to understand how…
Black hole unitarity and antipodal entanglement
Gerard 't Hooft
Hawking particles emitted by a black hole are usually found to have thermal spectra, if not exactly, then by a very good approximation. Here, we argue differently. It was discovere…
Singularities, horizons, firewalls, and local conformal symmetry
Gerard 't Hooft
The Einstein-Hilbert theory of gravity can be rephrased by focusing on local conformal symmetry as an exact, but spontaneously broken symmetry of nature. The conformal component of…
Diagonalizing the Black Hole Information Retrieval Process
Gerard t Hooft
The mechanism by which black holes return the absorbed information to the outside world is reconsidered, and described in terms of a set of mutually non-interacting modes. Our mech…
The Evolution of Quantum Field Theory, From QED to Grand Unification
Gerard 't Hooft
In the early 1970s, after a slow start, and lots of hurdles, Quantum Field Theory emerged as the superior doctrine for understanding the interactions between relativistic sub-atomi…
Local Conformal Symmetry: the Missing Symmetry Component for Space and Time
Gerard T. Hooft
Local conformal symmetry is usually considered to be an approximate symmetry of nature, which is explicitly and badly broken. Arguments are brought forward here why it has to be tu…
The Cellular Automaton Interpretation of Quantum Mechanics
Gerard 't Hooft
When investigating theories at the tiniest conceivable scales in nature, almost all researchers today revert to the quantum language, accepting the verdict from the Copenhagen doct…
Hamiltonian formalism for integer-valued variables and integer time steps and a possible application in quantum physics
Gerard 't Hooft
Most classical mechanical systems are based on dynamical variables whose values are real numbers. Energy conservation is then guaranteed if the dynamical equations are phrased in t…
The Fate of the Quantum
Gerard 't Hooft
Although the suspicion that quantum mechanics is emergent has been lingering for a long time, only now we begin to understand how a bridge between classical and quantum mechanics m…
Duality between a deterministic cellular automaton and a bosonic quantum field theory in 1+1 dimensions
Gerard 't Hooft
Methods developed in a previous paper are employed to define an exact correspondence between the states of a deterministic cellular automaton in 1+1 dimensions and those of a boson…
Relating the quantum mechanics of discrete systems to standard canonical quantum mechanics
Gerard 't Hooft
Discrete quantum mechanics is here defined to be a quantum theory of wave functions defined on integers P_i and Q_i, while canonical quantum mechanics is assumed to be based on wav…
How a wave function can collapse without violating Schroedinger's equation, and how to understand Born's rule
Gerard 't Hooft
It is often claimed that the collapse of the wave function and Born's rule to interpret the square of the norm as a probability, have to be introduced as separate axioms in quantum…
A class of elementary particle models without any adjustable real parameters
Gerard 't Hooft
Conventional particle theories such as the Standard Model have a number of freely adjustable coupling constants and mass parameters, depending on the symmetry algebra of the local…
Confinement at Large Nc
Gerard 't Hooft
A discussion is given of the confinement mechanism in terms of the Abelian projection scheme, for a general number Nc of colors. There is a difficulty in the Nc to infinity limit t…
Horizons
Gerard 't Hooft
The gravitational force harbours a fundamental instability against collapse. In standard General Relativity without Quantum Mechanics, this implies the existence of black holes as…
On Peculiarities and Pit Falls in Path Integrals
Gerard 't Hooft
Path integrals can be rigorously defined only in low dimensional systems where the small distance limit can be taken. Particularly non-trivial models in more than four dimensions c…
Perturbative Confinement
Gerard 't Hooft
A Procedure is outlined that may be used as a starting point for a perturbative treatment of theories with permanent confinement. By using a counter term in the Lagrangian that ren…
Large N
G. 't Hooft
In the first part of this lecture, the 1/N expansion technique is illustrated for the case of the large-N sigma model. In large-N gauge theories, the 1/N expansion is tantamount to…
The Holographic Principle
Gerard 't Hooft
After a pedagogical overview of the present status of High-Energy Physics, some problems concerning physics at the Planck scale are formulated, and an introduction is given to a no…