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Emergent Entropic Gravity from Quantum Entanglement in de Sitter Space?

Question: Is there already a theory (formula) available for emergent entropic gravity from Quantum Entanglement in de Sitter space? For detailed background information please refer to a recent ...
UN73's user avatar
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0 answers
64 views

Can charged boson be emergent?

Dirac's initial interpretation of antimatter is the existence of Dirac Sea. However, it doesn't work for bosons since we can't invoke Fermi's exclusion principle. Goldstone boson can be emergent but ...
Bababeluma's user avatar
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Is determinism an emergent property of non-deterministic systems?

In a similar way to how irreversible macroscopic processes are emergent from reversible microscopic processes, are deterministic macroscopic processes emergent from non-deterministic microscopic ...
Jayden Rivers's user avatar
1 vote
0 answers
70 views

Emergent higher symmetry breaking without topological order?

In this paper prof. Wen states that (p.6) a spontaneous higher symmetry broken state always corresponds to a topologically ordered state. Are there examples of simple (or not) quantum spin models ...
Kostas's user avatar
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1 answer
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What do you call a system (like mine) that exhibits emergent physics-like behaviour from particles only described by their position? [closed]

I built a computer simulation of a 2D space which contains particles of only two types: attractive and repulsive. The particles only have an X and Y coordinate. The repulsive particles are repelled ...
Alex Jonathan Henderson's user avatar
1 vote
3 answers
181 views

Force and momentum, cause and effect, transition and state

Dale, an experienced contributor to this site, offered a surprising explanation for Newton's postulate actio = reactio: In this answer he argued the "explanation [for equal but opposite forces] ...
Peter - Reinstate Monica's user avatar
6 votes
4 answers
200 views

Is there any theory of fundamental physics that proposes that there are no symmetries at a fundamental level and that they are all emergent?

Quantum gravity theories usually propose that global symmetries are not fundamental. Are there any theories that propose that all symmetries (Lorentz symmetry, gauge symmetry...) and therefore the ...
vengaq's user avatar
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3 votes
2 answers
599 views

Are there real examples of strongly emergent systems?

A strongly emergent system is a physical system whose properties are not reducible to causal relationships and interactions between the elements of this system. That is, the whole is not the sum of ...
Arman Armenpress's user avatar
2 votes
3 answers
197 views

Is it provable that gravity can not emerge from the standard model?

This seems like a really foolish question, but is it provable that the standard model does not contain gravitation as some emergent phenomenon? There are obvious extensions to the SM as well, e.g. ...
CasualScience's user avatar
1 vote
0 answers
176 views

Can Consciousness be Understood as an Emergent Phenomenon of the Evolution of the Human Brain? [closed]

Straight question - is explaining (or at least understanding) consciousness in the realm of physics? Detailed question: We know that consciousness exists. Or rather, I know that I have it. The rest of ...
Bhagwad Jal Park's user avatar
2 votes
0 answers
63 views

Is there any model or theory which considers that spacetime and symmetries are all emergent? [duplicate]

There are a lot of models which propose that spacetime is actually emergent. I am not sure if this necessarily means that all symmetries associated with spacetime would also be emergent. Do you know ...
vengaq's user avatar
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3 votes
6 answers
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In Newtonian mechanics, is angular momentum an emergent property of linear momentum?

My intuition tells me that angular momentum is merely a consequence of the linear momenta of each constituent particle coupled with the forces pulling each particle towards the center of mass. If this ...
joshlf's user avatar
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1 answer
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Does emergence or the second law create more degrees of freedom total? [closed]

Here's my layman thought process: By emergence and the second law, new "modes" or points in configuration space become "unlocked" with macroscopic systems. One is a brain, which ...
J Kusin's user avatar
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2 votes
1 answer
326 views

Mathematical tools for emergent structures in the Wolfram Physics project? [closed]

Wolfram Physics project https://www.wolframphysics.org/ demonstrates how complex structures emerge from the simple graph-like structures and rules. Graphs can be used as the microstructure, in fact - ...
TomR's user avatar
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1 answer
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Is it possible a state be a Quantum Spin Liquid and has long range order at the same time?

Quantum spin liquid ([QSL])1 is usually defined as a kind of phase that (1) no long-range order, (2) has long-range entanglement and (3) hosts emergent gauge structures or fractionalized excitations. ...
mr.no's user avatar
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4 votes
0 answers
191 views

Understanding Verlinde: How to get from emergent gravity to MOND

Verlinde ( https://arxiv.org/abs/1611.02269 ) tries to deduce MOND from emergent gravity. Can you help? Emergent or entropic gravity goes back to Jacobson. He starts with the entropy-area connection $...
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Spacetime metric as an order parameter?

I've been reading on Sean Carroll's ideas ([1], [2]) on space from Hilbert space and bulk entanglement gravity in which he tries (and succeds) to derive the linearized Einstein equation directly from ...
asd11's user avatar
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1 answer
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Is there an ambiguity in time in the absence of clocks?

Imagine 2 clocks space 2 meters apart with a vacuum in between. These are macroscopic objects with which we can measure time. But in between these, according to general relativity, we can foliate ...
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2 votes
0 answers
51 views

Dark matter as an emergent phenomenon

Dark matter is invoked as a solution to anomalies in galactic rotation curves, galaxy motions in clusters, and gravitational lensing (please mention other evidence for dark matter that is relevant to ...
Alex's user avatar
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1 answer
107 views

Emergence of elastic (as well as plastic) properties of metals

Whenever a force is applied on an metal it causes deformation and a stress is generated. Metals form a lattice which has lower energy than isolated metal atoms (due to the formation of metallic ...
user avatar
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0 answers
83 views

Why is it sometimes impossible to derive macroscopic properties of a system starting from a microscopic analysis?

I have read Philip Anderson and Robert Laughlin articles about emergence. They claim that a macroscopic description of some systems are sometimes impossible to be derived from a microscopic analysis. ...
untreated_paramediensis_karnik's user avatar
3 votes
1 answer
264 views

Is friction an emergent phenomenon?

The microscopic origin of the frictional forces is due to contact between irregularities of the surfaces as seen here [1]. Electromagnetic interactions are the fundamental forces responsible for ...
PolaroidDreams's user avatar
2 votes
0 answers
62 views

Do condensed-matter field theories with multiple fields generically have multiple speeds of sound?

It is well known that the low-energy physics of many non-relativistic condensed matter systems can be described by field theories that display emergent Lorentz symmetry. The heuristic way to figure ...
tparker's user avatar
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1 vote
1 answer
78 views

Are objects repelled by the cosmological horizon in Lambda-CDM cosmology?

When an observer watches a distant object, is there a gravitational influence of the horizon on that object? ("Distant" here is meant to mean: at a distance that is a sizeable fraction of the Hubble ...
frauke's user avatar
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157 views

Could the graviton be more than one particle?

I guess this amounts to saying that gravity isn't a fundamental force and is, in fact, an emergent phenomenon (as in Erik Verlinde's theory). If gravity can be 'unified' with the other forces surely ...
Sam Cottle's user avatar
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4 votes
0 answers
109 views

Ghost in quantum many body systems

Since we know the gauge theory can be emergent from local tensor product Hilbert space of quantum many body systems, such as solid state or condensed matter, etc. How do we understand the ghosts in ...
ann marie cœur's user avatar
21 votes
1 answer
655 views

Phil Anderson's Criticism of Existence of Stable Dissipative Structures

In this book chapter (1987), titled "Broken symmetry, emergent properties, dissipative structures, life," Phil Anderson and Daniel Stein criticize defining life as a dissipative structure (a ...
stochastic's user avatar
10 votes
4 answers
10k views

What does it mean that space-time is emergent?

Edward Witten (Institute for Advanced Study in Princeton), Fields medallist, the discoverer of M-theory and considered a genius by many, recently gave one of his rare interviews (https://www....
vonjd's user avatar
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3 votes
1 answer
702 views

Are mass, and therefore time, emergent phenomena?

As I understand, massless particles such as gluons and photons do not experience time due to the principles of relativity. An electron isn't sincerely an elementary particle - doesn't it exist more ...
Brad Cooley's user avatar
1 vote
1 answer
160 views

Can we tell apart $A$ and $B$? -- from a non-relativistic system $A$ to an emergent relativistic system $B$

We know that the non-relativistic system like Graphene with a particular filling of electrons give rise to relativistic Dirac equations at low energy, with multi-flavors of Dirac particles. In terms ...
wonderich's user avatar
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2 votes
1 answer
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Periodicity of the Kelvin-Helmholtz Instability

Why is the Kelvin-Helmholtz Instability so regular across space? If any perturbations anywhere in the boundary can lead to instability, why doesn't the pattern appear randomly across the boundary? ...
Zhengqun Koo's user avatar
7 votes
1 answer
2k views

Emergent Gravity theory by Verlinde

Erik Verlinde has proposed a emergent structure of Gravity in a recent paper Emergent Gravity and the Dark Universe Abstract from paper cited above Recent theoretical progress indicates that ...
Ari's user avatar
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8 votes
1 answer
3k views

Spin ice / spin liquid v.s. quantum spin ice / quantum spin liquid

What are the distinguishment between (1) spin ice, (2) spin liquid and (3) quantum spin ice, (4) quantum spin liquid? Apparently the quantum effect for the later (3) and (4) becomes important. But ...
wonderich's user avatar
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-1 votes
1 answer
84 views

Property of light [closed]

Is there any type of light wave which can bend like a thread while travelling? Can this light travel without meeting an obstacle?
dineshreddy reddam's user avatar
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0 answers
146 views

How strong could a carbon nanotube be?

I was thinking about the limits of flywheel energy storage and wondered about carbon nanotubes. The amount of energy that can be stored per unit mass in a flywheel depends not on tensile strength but ...
Charles's user avatar
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1 vote
1 answer
249 views

Why does a dynamical gauge field accompany fractionalisation?

I'm trying to understand fractionalisation, of which spin-charge separation is an example. I've read that this is accomplished by introducing a Lagrange multiplier field, which becomes a dynamical ...
Aegon's user avatar
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2 votes
0 answers
341 views

What are the preferred subsystems of the universe? [closed]

I am not a physicist but I am interested in philosophical implications of theoretical physics. My understanding is that many physical properties like mass, volume, temperature etc. - are emergent ...
Len Yabloko's user avatar
3 votes
0 answers
215 views

c "Propagation" in Weber Electrodynamics [closed]

The telegraph model of Weber-Gauss, relying on Weber's electrodynamics, modeled instantaneous action at a distance of the electric scalar potential (Coulomb potential) manifesting as propagation of ...
James Bowery's user avatar
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2 votes
1 answer
368 views

Can a nondegenerate fermionic topological Mott insulator (TMI) state support an emergent bosonic topological order?

Based on my recent study and motivated by a recent paper, I have a naive question. Consider a 2d Hubbard model for electrons at half filling $H=\sum c_k^\dagger h_k c_k+U\sum n_{i\uparrow }n_{i\...
Kai Li's user avatar
  • 3,744
6 votes
2 answers
2k views

Is entropy in quantum mechanics emergent or fundamental?

Since a quantum mechanical system, even an isolated system containing one particle, can be described by a density matrix, with entropy for the system given by $\langle S\rangle=-k \rho\ln(\rho)$, is ...
user53081's user avatar
19 votes
2 answers
746 views

Can renormalization group evolution be used to capture emergence?

I am posing this question with condensed matter systems in mind. Is it, in principle, possible to obtain emergence using the renormalization group (RG)? I read in X.-G. Wen's book (Quantum Field ...
S.G.'s user avatar
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9 votes
2 answers
611 views

What is the minimal symmetry required for a spin Hamiltonian to describe a spin-liquid ground state?

Let's restrict to the case of spin-1/2 system. As we know, a spin-liquid (SL) state is the ground state of a lattice spin Hamiltonian with no spontaneous broken symmetries (sometime it may ...
Kai Li's user avatar
  • 3,744
0 votes
2 answers
402 views

Understanding emergent phenomena in the block universe. (Reworded question)

Each person exists as an unchanging 4D worldtube in the block universe. At each slice of the worldtube there is a present, past and future. However, there is a black box* which appears to exist in ...
iRoygbiv's user avatar
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0 votes
1 answer
70 views

emergent phenomena from microscopic equations of motion

Is an emergent phenomenon like "superfluidity" or "quantum Hall effect" derivable from microscopic equations of motion? If No, why?
richard's user avatar
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7 votes
1 answer
1k views

``What is life?'' by a physicist definition [closed]

The question is about defining ``What is life?'' in the field of Physics. Whether there is any (insightful) way of defining ``What is life?'' from physicists. There are pioneer works, including ...
wonderich's user avatar
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4 votes
1 answer
366 views

Fractionalization and the structure of spin rotation group?

As we know, the phenomena of fractionalizations in condensed matter physics is fantastic, like fractional spin, fractional charge , fractional statistics, .... And one key point is that the ...
Kai Li's user avatar
  • 3,744
13 votes
3 answers
491 views

Can anyons emerge from momentum-space other than spatial dimensions?

So far in condensed matter physics, I only know anyons(abelian or nonabelian) can emerge as quasiparticles in 2D real-space. But is there any possibility to construct anyons in momentum-space ? And ...
Kai Li's user avatar
  • 3,744
19 votes
2 answers
2k views

How to understand the emergent special relativity in the superfluid?

The superfluid vacuum theory was proposed to understand some features of the vacuum (aether) from the emergence point of view. Although made up of non-relativistic atoms, the low-energy excitations of ...
Everett You's user avatar
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9 votes
2 answers
2k views

A simple model that exhibits emergent symmetry?

In a previous question Emergent symmetries I asked, Prof.Luboš Motl said that emergent symmetries are never exact. But I wonder whether the following example is an counterexample that has exact ...
Kai Li's user avatar
  • 3,744
37 votes
1 answer
4k views

Emergent symmetries

As we know, spontaneous symmetry breaking(SSB) is a very important concept in physics. Loosely speaking, zero temprature SSB says that the Hamiltonian of a quantum system has some symmetry, but the ...