scholarly journals ‘Exotic’ quantum effects in the laboratory?

2008 ◽  
Vol 366 (1877) ◽  
pp. 2895-2903 ◽  
Author(s):  
Ralf Schützhold
Keyword(s):  
Experimental Study ◽  
Hawking Radiation ◽  
Particle Creation ◽  
Quantum Effects ◽  
Unruh Effect ◽  
Recent Developments

This article provides a brief (non-exhaustive) review of some recent developments regarding the theoretical and possibly experimental study of ‘exotic’ quantum effects in the laboratory with special emphasis on cosmological particle creation, Hawking radiation and the Unruh effect.

QUANTUM COSMOLOGY: SUSY'S STAGE

2013 ◽  
Vol 22 (04) ◽  
pp. 1330006 ◽  
Author(s):  
PAULO VARGAS MONIZ
Keyword(s):  
Early Universe ◽  
Quantum Cosmology ◽  
Quantum Effects ◽  
The Other ◽  
Parallel Session ◽  
Other Hand ◽  
Recent Developments ◽  
The One

This report comprises two parts. On the one hand, I will, based on the talks at the CM4 parallel session "Quantum Cosmology and Quantum Effects in the Early Universe" which I chaired, point to interesting recent developments in quantum cosmology. On the other hand, some of the basics of supersymmetric quantum cosmology are briefly reviewed, pointing to promising lines of research to explore. I will start with the latter, finishing the report with the former.

scholarly journals Calculation of Acceleration Effects Using the Zubarev Density Operator

Particles ◽  
2020 ◽  
Vol 3 (1) ◽  
pp. 1-14 ◽  
Author(s):  
Georgy Prokhorov ◽  
Oleg Teryaev ◽  
Valentin Zakharov
Keyword(s):  
Perturbation Theory ◽  
Fourth Order ◽  
Density Operator ◽  
Quantum Effects ◽  
Quantum Corrections ◽  
Unruh Effect ◽  
Relativistic Form ◽  
Perturbative Corrections

The relativistic form of the Zubarev density operator can be used to study quantum effects associated with acceleration of the medium. In particular, it was recently shown that the calculation of perturbative corrections in acceleration based on the Zubarev density operator makes it possible to show the existence of the Unruh effect. In this paper, we present the details of the calculation of quantum correlators arising in the fourth order of the perturbation theory needed to demonstrate the Unruh effect. Expressions for the quantum corrections for massive fermions are also obtained.

What Are the Recent Developments in the Experimental Study of Staff Utilization

1958 ◽  
Vol 42 (237) ◽  
pp. 273-290
Author(s):  
Lloyd S. Michael ◽  
Clarence A. Brock ◽  
Kenneth K. Hansen ◽  
Charles Romine ◽  
Alfred L. Pirtle ◽  
...  
Keyword(s):  
Experimental Study ◽  
Recent Developments

scholarly journals HAWKING RADIATION AS A MECHANISM FOR INFLATION

2012 ◽  
Vol 21 (11) ◽  
pp. 1242020 ◽  
Author(s):  
SUJOY KUMAR MODAK ◽  
DOUGLAS SINGLETON
Keyword(s):  
Black Hole ◽  
Early Universe ◽  
Power Law ◽  
Negative Pressure ◽  
Hawking Radiation ◽  
Particle Creation ◽  
Hawking Temperature ◽  
Exponential Expansion ◽  
The Universe

The Friedman–Robertson–Walker (FRW) spacetime exhibits particle creation similar to Hawking radiation of a black hole. In this essay we show that this FRW Hawking radiation leads to an effective negative pressure fluid which can drive an inflationary period of exponential expansion in the early universe. Since the Hawking temperature of the FRW spacetime decreases as the universe expands this mechanism naturally turns off and the inflationary stage transitions to a power law expansion associated with an ordinary radiation-dominated universe.

scholarly journals QUANTUM EFFECTS ASSOCIATED WITH AN ELECTRICALLY NEUTRAL MASSLESS PARTICLE IN A BERTOTTI-ROBINSON UNIVERSE

1994 ◽  
Vol 09 (34) ◽  
pp. 3185-3191
Author(s):  
VÍCTOR M. VILLALBA
Keyword(s):  
Exact Solution ◽  
Dirac Equation ◽  
Separation Of Variables ◽  
Particle Creation ◽  
Quantum Effects ◽  
Massless Particle

In this article we obtain, by separation of variables, an exact solution to the Dirac equation with anomalous momentum for an electrically neutral massless particle in a Bertotti-Robinson universe. We discuss the phenomenon of particle creation in this model.

scholarly journals Effective Lagrangian and Static Black Holes in 2-D Dilatonic Gravity Inspired by Quantum Effects

1997 ◽  
Vol 12 (13) ◽  
pp. 925-935 ◽  
Author(s):  
Shin'ichi Nojiri ◽  
Sergei D. Odintsov
Keyword(s):  
Black Holes ◽  
Quantum Gravity ◽  
Effective Action ◽  
Hawking Radiation ◽  
Quantum Effects ◽  
Dilaton Gravity ◽  
Effective Lagrangian ◽  
The One

We study the effective action in 2-D dilaton-Maxwell quantum gravity. Working with the one-loop renormalizable subset of such theories, we construct the improved effective Lagrangian which contains curvature under logarithm. This effective Lagrangian leads to new classical dilatonic gravity inspired by quantum effects. The static black holes (BH) solutions which may play the role of a remnant after the Hawking radiation for such theory are carefully investigated. The effective Lagrangian for Gross–Neveu-dilaton gravity is also constructed (in 1/N expansion).

scholarly journals Physical observers, T-vacuum and Unruh like effect in the radiation dominated early universe

2020 ◽  
Vol 2020 (12) ◽  
Author(s):  
Sujoy K. Modak
Keyword(s):  
Excited State ◽  
Early Universe ◽  
Particle Creation ◽  
Vacuum State ◽  
Unruh Effect ◽  
Two Dimensional ◽  
Creation Process ◽  
Flat Spacetime ◽  
Set Up

Abstract We report the existence of an Unruh like effect, for physical observers (cosmo- logical and comoving observers) in the radiation dominated early universe, which is possible due to the discovery of a new vacuum state (referred here as the T−vacuum). Both the comoving and the cosmological observers, who are crucial in our understanding of cosmology, observe this T−vacuum as a particle excited state and are able to detect radiation due to particle creation. We draw a robust analogy with the Unruh effect, whereby — (i) the physical observers here are closely analogous to the accelerated (Rindler) observers in the flat spacetime, and (ii) the T−vacuum plays the role of the Minkowski vacuum state which contains particles when viewed from the physical observers frame. Our analogy is further supported by a proof of well-defined (hadamard) behavior of the T−vacuum in the entire spacetime. All our analysis of the particle creation process is done here within a two dimensional set up.

GRAVITATIONALLY-INDUCED PARTICLE RESORPTION INTO THE VACUUM: A GENERAL SOLUTION TO THE PROBLEM OF BLACK HOLE COLLAPSE

2005 ◽  
Vol 14 (12) ◽  
pp. 2285-2291 ◽  
Author(s):  
M. P. SILVERMAN
Keyword(s):  
Black Hole ◽  
Singular Point ◽  
General Solution ◽  
Equilibrium State ◽  
Hawking Radiation ◽  
Particle Creation ◽  
Matter Density ◽  
Quantum States ◽  
General Mechanism ◽  
Level I

The process of gravitationally-induced particle creation (Hawking radiation), if it exists, necessitates, in accordance with general thermodynamic principles, a corresponding process of gravitationally-induced particle resorption into the vacuum. Although the former process occurs in the external vicinity of the Schwarzschild surface where matter density is relatively low, the latter process would be expected to occur inside the Schwarzschild surface where the stellar material is enormously compressed and fermions fill all quantum states up to the Fermi level. I show that the occurrence of particle resorption provides a general mechanism, irrespective of the interactions of the constituent particles, which halts the collapse of a black hole to a singular point and leads to an equilibrium state of macroscopic extent.

GROUND STATES UNDER GRAVITY AND BLACK HOLE EVAPORATION

1991 ◽  
Vol 06 (15) ◽  
pp. 1341-1346
Author(s):  
KENJI FUKAZAWA
Keyword(s):  
Black Hole ◽  
Shell Model ◽  
Ground State ◽  
Hawking Radiation ◽  
Particle Creation ◽  
Point Of View ◽  
Spatial Infinity ◽  
Black Hole Evaporation ◽  
State Of Matter ◽  
Matter Fields

One may expect that the ground state of matter fields depends on the strength of gravity on account of the particle creation by the effect of gravity. In this letter we examine the argument of Hawking from this point of view by considering the shell model. We find that an observer at rest at spatial infinity can ‘see’ no radiation while an observer at rest near the horizon ‘sees’ Hawking radiation. Note that the latter thinks that the radiation is to be ‘seen’ at spatial infinity.

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