Analogue gravity from electrodynamics in nonlinear media

Lorenci, V. A. De; Klippert, R.

doi:10.1103/physrevd.65.064027

Cited by 51 publications

(41 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This kinematical analogy implies that acoustic black holes should emit Hawking radiation [3] in the form of a thermal bath of phonons [2,4], thus making possible the experimental verification of such phenomenon. Following Unruh's prediction many different kinds of analogue models has been proposed [5,6,7] but BoseEinstein condensates (BEC) [8,9] are currently the best workbenches for this kind of investigation. The experimental implementation of acoustic black holes in such systems could be possible by setting suitable external potentials to obtain the required background flow.…”

Section: Introductionmentioning

confidence: 99%

Acoustic black holes in a two-dimensional “photon fluid”

Marino

2008

Phys. Rev. A

104

View full text Add to dashboard Cite

Optical field fluctuations in self-defocusing media can be described in terms of sound waves in a 2D photon-fluid. It is shown that, while the background fluid couples with the usual flat metric, sound-like waves experience an effective curved spacetime determined by the physical properties of the flow. In an optical cavity configuration, the background spacetime can be suitably controlled by the driving beam allowing the formation of acoustic ergoregions and event horizons. An experiment simulating the main features of the rotating black hole geometry is proposed.

show abstract

Section: Introductionmentioning

confidence: 99%

Acoustic black holes in a two-dimensional “photon fluid”

Marino

2008

Phys. Rev. A

104

View full text Add to dashboard Cite

show abstract

“…In this context, effective geometries were found to describe the modes both for the linear [7,36,37] as well as non-linear [19,20] constitutive relations. The results presented in these references lead us to conclude that electromagnetic waves usually propagate inside material media as if immersed in a curved spacetime.…”

Section: Analogue Models From Electrodynamics In Materials Mediamentioning

confidence: 99%

“…It deals with acoustics [2,[8][9][10][11][12][13][14][15][16][17][18], optics [19][20][21][22][23][24][25][26][27], among others [28][29][30][31][32][33][34][35]. These are only representative references.…”

Section: Introductionmentioning

confidence: 99%

Non gravitational black holes

Lorenci¹,

Klippert²

2004

Braz. J. Phys.

Self Cite

View full text Add to dashboard Cite

Analogue models of general relativity have recently been considered with great interest by the scientific community. They connect branches of physics as different as gravitation, condensed matter physics, electrodynamics, acoustics, and quantum field theory. One of the main expectations about such models lies on the possibility of testing in laboratory some aspects of quantum field theory in curved spacetimes. For instance, it seems to be possible to probe the existence of Hawking radiation by means of analogue models in the context of certain condensed matter systems. We briefly report the present day status of this topic of research. Some specific models are considered, particularly those presenting analogue event horizons as solutions. The issue of thermal emission (analogue Hawking radiation) is also discussed.

show abstract

“…The advantage of the using phase-space analysis [41][42][43][44][45][46][47][48][49][81][82][83][84][85][86][87][88][89][90][91] is that one can do more stability analysis with using visual plots using the trajectories in geometrical way so that it becomes easy to observe the property with the help of the attractors which are the most easily seen experimentally [92]. On the other hand, conceptually using NED has the advantage that no need to use some exotic fields such as scalar fields, branes or extra dimensions, it is just photon fields, and it is well known also in nonlinear optics which studying behavior of light in nonlinear media and also nonlinear collision of particles in quantum electrodynamics [93][94][95][96][97][98][99].…”

Section: Introductionmentioning

confidence: 99%

Falsifying cosmological models based on a non-linear electrodynamics

et al. 2018

View full text Add to dashboard Cite

Recently, the nonlinear electrodynamics (NED) has been gaining attention to generate primordial magnetic fields in the Universe and also to resolve singularity problems. Moreover, recent works have shown the crucial role of the NED on the inflation. This paper provides a new approach based on a new model of NED as a source of gravitation to remove the cosmic singularity at the big bang and explain the cosmic acceleration during the inflation era on the background of stochastic magnetic field. Also, we found a realization of a cyclic Universe, free of initial singularity, due to the proposed NED energy density. In addition, we explore whether a NED field without or with matter can be the origin of the late-time acceleration. For this we obtain explicit equations for H (z) and perform a MCMC analysis to constrain the NED parameters by using 31 observational Hubble data (OHD) obtained from cosmic chronometers covering the redshift range 0 < z < 1.97; and with the joint-light-analysis (JLA) SNIa compilation consisting in 740 data points in the range 0.01 < z < 1.2. All our constraints on the current magnetic field give B 0 ∼ 10 −31 cm −1 , which are larger than the upper limit 10 −33 cm −1 by the Planck satellite implying that NED cosmologies could not be suitable to explain the Universe late-time dynamics. However, the current data is able to falsify the scenario at late times. Indeed, one is able to reconstruct the deceleration parameter q(z) using the best fit values of the parameters obtained from OHD and SNIa data a e-mail: ali.ovgun@pucv.cl URL: https://www.aovgun.com b e-mail: genly.leon@ucn.cl c e-mail: juan.magana@uv.cl d e-mail: kimet.jusufi@unite.edu.mk sets. If the matter component is not included, the data sets predict an accelerated phase in the early Universe, but a non accelerated Universe is preferred in the current epoch. When a matter component is included in the NED cosmology, the data sets predict a q(z) dynamics similar to that of the standard model. Moreover, both cosmological data favor up to 2σ confidence levels an accelerating expansion in the current epoch, i.e., the Universe passes of a decelerated phase to an accelerated stage at redshift ∼ 0.6. Therefore, although the NED cosmology with dust matter predict a value B 0 higher than the one measured by Planck satellite, it is able to drive a late-time cosmic acceleration which is consistent with our dynamical systems analysis and it is preferred by OHD and SNIa data sets.

show abstract

Analogue gravity from electrodynamics in nonlinear media

Cited by 51 publications

References 27 publications

Acoustic black holes in a two-dimensional “photon fluid”

Acoustic black holes in a two-dimensional “photon fluid”

Non gravitational black holes

Falsifying cosmological models based on a non-linear electrodynamics

Contact Info

Product

Resources

About