Some of the key open issues that are being studies concern the search of other examples of dsr theories, the study of the multiparticle sector of given dsr theories, and attempts of nding a full solution of the cosmicray paradox within dsr. Doubly special hence the name doubly special relativity. However, the current popular name is doubly special relativity. Later, einstein was able to further develop this theory, leading to what is known as the general theory of relativity. In particular, i discuss a dsr scenario without modification of the energy momentum dispersion relation and without the. Documents and settingsphilip harrismy documentsteaching.
I honestly cant say i really knew what i was doing until about halfway through the third time. Emergence of special and doubly special relativity petr jizba1,2, and fabio scardigli3,4, 1fnspe, czech technical university in prague, br. We discuss the recent proposal of implementing doubly special relativity in configuration space by means of finsler geometry. On a new p osition space doubly special relativity theory 4. The symmetry group is still the lorentz group, but in both cases. The theory based on these assumptions has been named doubly special relativity dsr. Feb 02, 2006 in a fivepagelong highly efficient paper, nosratollah jafari and ahmad shariati show that the rules of the socalled doubly special relativity dsr to transform the energymomentum vectors are nothing else than the ordinary rules of special relativity translated to awkward variables that parameterize the energy and the momentum. Kowalskiglikman, introduction to doubly special relativity, in giovanni amelinocamelia and jerzy kowalskiglikman, planck scale effects in astrophysics and cosmology, lecture notes in physics 669, springer 2005 arxiv. Re call that special relativity is based on two postulates. These principles, and their consequences constitute the special theory of relativity. Some call such theories deformed special relativity while others call them extended str e. In an earlier reading, we proposed a new position space doubly special relativity theory that makes use of quantum fluctuations to achieve an invariant scalelength.
In this paper we show that both these theories can be understood. All the doubly special relativity dsr models studied in literature so far involve a deformation of the energy conservation rule that forces us to release the hypothesis of the additivity of the energy for composite systems. In a fivepagelong highly efficient paper, nosratollah jafari and ahmad shariati show that the rules of the socalled doubly special relativity dsr to transform the energymomentum vectors are nothing else than the ordinary rules of special relativity translated to awkward variables that parameterize the energy and the momentum. Pdf application of the doubly special relativity to the dirac. More recently several studies have also considered the possibility of a doubly special relativity, in which the modification of the dispersion relation emerges from a framework with both the planck scale and the speedoflight scale as characteristic scales of a 6parameter group of rotationboost symmetry transformations a deformation of. In these notes we first discuss the postulates of dsr, and then turn to presenting arguments supporting the hypothesis that dsr can be regarded as a flat space. For the man on the street, einstein and relativity are prob ably epitomized by this result. The connection between the new suggestion and some existing theories, such as doubly special relativity, is also briefly discussed. Abstract i examine the results obtained so far in exploring the recent proposal of theories of the relativistic transformations between inertial observers that involve both an observerindependent velocity scale and an observerindependent lengthmomentum scale. Find materials for this course in the pages linked along the left.
Black hole thermodynamics under the generalized uncertainty. There has been a renaissance in tests of special relativity sr, in part because considerations of quantum gravity imply that sr may well be violated at appropriate scales very small distance, very high energy. We propose a new interpretation of doubly special relativity dsr based on the distinction between the momentum and the translation generators in its phase space realization. What is the experimental basis of special relativity. Doubly special relativity dsr is a theory with two observerindependent scales, of velocity and mass, which is expected to replace special relativity at ultrahigh energies. Federal reserve, european central bank and bank of japan balance sheets in u. We argue that the socalled doubly special relativity dsr, recently proposed by amelinocamelia et al.
Ive recently been looking up alternatives to string theory sorry, im just not that much of a fan of it and found doubly special relativity which seems to be a possible waste of time. I remember hearing about this theory called doubly special relativity a while ago, and i stumbled upon an article in one of the popular science magazines i cant remember which it was an oldish paper copy though which i think was. Doubly special relativity dsr also called deformed special relativity or, by some, extra special relativity is a modified theory of special relativity in which there is not only an observerindependent maximum velocity the speed of light, but an observerindependent maximum energy scale and minimum length scale the planck energy and planck length. Of course, this postulate must be implemented in such a way that the principle of relativity, i. In 1915 he published his general theory of relativity, dealing withgravityandacceleration. In fact, there have been two main subspecies of dsr.
Recently another theory of this kind has been proposed by magueijo and smolin. Doubly special relativity and finsler geometry core. Amongst other things, this latter theory is essentially a theory of gravitation. Dsr is an extension of special relativity, based on two principles. Relativity principle for inertial observers and the existence of a single observer independent.
Introduction to special and general relativity hub. Modifying einsteins theory of special relativity could account for this anomaly. Phenomenology of doubly special relativity international. Although this formalism leads to a consistent description of the dynamics of a particle, it does not seem to give a complete description of the physics. Motivation my proposal 1,2 of the doubly special relativity scenario intended to provide an alternative perspective on the studies of quantumgravityinduced planckscale departures from lorentz symmetry which had been presented in numerous articles see, e. Doubly special relativity dsr theory is a theory with two observerindependent scales, of velocity and mass or length. Doubly special relativity in position space starting from the. Doubly special relativity dsr also called deformed special relativity or, by some. In my talk i would like to discuss the present status of doubly special relativity.
Introduction to doubly special relativity springerlink. Dec 10, 2007 i hope this is the correct place to post such a thread. Aew research a special theory of relativity winter 2018 5 figure 3. Doubly special relativity dsr also called deformed special relativity or, by some, extraspecial relativity is a modified theory of special relativity in which there is not only an observerindependent maximum velocity the speed of light, but an observerindependent maximum energy scale and minimum length scale the planck energy and planck length. Motivation my proposal 1,2 of the doublyspecialrelativity scenario intended to provide an alternative perspective on the studies of quantumgravityinduced planckscale departures from lorentz symmetry which had been presented in numerous articles see, e. I report, emphasizing some key open issues and some aspects that are particularly relevant for phenomenology, on the status of the development of doubly special relativistic dsr theories with both an observerindependent highvelocity scale and an observerindependent small. Pdf in this letter we generalize the dirac equation in the context of the magueijosmolin ms 1 approach to the doubly special relativity. Relativity without light there are many different deductions of the lorentzlike. Doubly special relativity in position space starting from the conformal. The version is based on deformation of ordinary lorentz. The theory of relativity usually encompasses two interrelated theories by albert einstein. General relativity explains the law of gravitation and its relation to other forces of nature. The choice of symmetric composition law for deformed fourmomenta. Einstein june 30, 1905 it is known that maxwells electrodynamicsas usually understood at the present timewhen applied to moving bodies, leads to asymmetries which do.
Pdf on a new position space doubly special relativity theory. It has been seven years since the last update of this page, and there are over. Dsr is an extension of special relativity aimed at describing kinematics of particles and fields in the regime where quantum gravity effects might become relevant. Mar 21, 2011 now, doubly special relativity, proposes that not only is the speed of light always the same regardless of your frame of reference, but planck units of mass and energy are also always the same. On a new positionspace doublyspecial relativity theory. Largescale nonlocality in doubly special relativity with. Magueijo and smolin 3 present a new theory based on the idea 2 of doubly special relativity, in which the planck. Massachusetts institute of technology department of. Jul 10, 2006 double special relativity theories are the relativistic theories in which the transformations between inertial observers are characterized by two observer. These theories contain two fundamental scalesthe speed of light and an energy usually taken to be e planck.
But theres another place in physics where the speed of light plays a prominent role. And are there any other testable theories out there besides the standard. A key element of our study is an observation that removes a possible sign ambiguity for the doubly special relativity framework. We propose version of doubly special relativity theory starting from position space. This course will give a basic introduction to einsteins special theory of relativity followed by a close reading of his classic paper on gravitation and the general theory of relativity, from 1915. More recently several studies have also considered the possibility of a doubly special relativity, in which the modification of the dispersion relation emerges from a framework with both the. As this theory has two invariant scales, the modified form of the theory is usually called doubly special relativity dsr 35,4547. When einstein invented general relativity, he was aware that simultaneity is not wellde ned in special relativity, and so newtons law of gravity is no longer. Electromagnetism and relativity weve seen that maxwells equations have wave solutions which travel at the speed of light.
Status report on doubly special relativity kowalski. There is unique deformation which does not modify rotations. Then i show how, in the case of a field theory with curved momentum space, the hopf algebra of symmetries naturally emerges. According to einsteins special theory of relativity, it is impossible to say in an absolute sense that two distinct events occur at the same time if those events are separated in space. I will discuss an interplay between dsr physics and mathematics of hopf algebras. Doubly special relativity as a limit of gravity core. We also argue that the implementation of dsr theories does not necessarily require a deformation of the lorentz symmetry, but only of the translation invariance.
I should warn the reader that the construction of the theory of doubly. Now, doubly special relativity, proposes that not only is the speed of light always the same regardless of your frame of reference, but planck units of mass and energy are also always the same. General relativity is beautiful, fascinating, and important for a number of reasons. To be more precise, by embracing two invariant fundamental scales, the speed of light and an energy scale distinguished with planck energy, deformation of special relativity can be considered. Now, doubly special relativity, proposes that not only is the speed of light always the same regardless of your frame of reference, but planck units of. Based on the doubly special relativity we find a new type of generalized uncertainty principle gup where the coordinate remains unaltered at. Massachusetts institute of technology department of physics 8. In particular, i discuss a dsr scenario without modification of the energymomentum dispersion relation and without the. This points directly to the idea that spacetime must be quantized in small spacetime volumes of ct p 3 and that spacetime should consist of planck nodes, i. Amongst other things, this latter theory is essentially. New generalized uncertainty principle from the doubly special relativity. Special relativity applies to all physical phenomena in the absence of gravity. Feb 20, 2018 this course will give a basic introduction to einsteins special theory of relativity followed by a close reading of his classic paper on gravitation and the general theory of relativity, from 1915.
The version is based on deformation of ordinary lorentz transformations due to the special conformal transformation. We study two main examples of these theories and want to show that these theories are not the new theories of relativity, but only are re. Dollars millions the search for relative value stocks, bonds and reit valuations are set in a realtime, continuous auction market with a high degree of information efficiency. There are two major alternatives for violating the usual lorentz invariance at large planckian energies or momentaeither not all inertial frames in the planck regime are equivalent e. Doubly special relativity 21 march 2011, by steve nerlich the large hadron collider destined to deliver fabulous science data, but it remains uncertain if these will include. Doubly special relativity as a limit of gravity springerlink. Here i would like to describe one possibility, whose central postulate is that in spite of the fact that departures from special relativity are introduced at scales close to planck scale, one keeps unchanged the central physical message of the theory of relativity, namely the. Oct 12, 2005 here i would like to describe one possibility, whose central postulate is that in spite of the fact that departures from special relativity are introduced at scales close to planck scale, one keeps unchanged the central physical message of the theory of relativity, namely the equivalence of all inertial observers. Pdf the general consensus feeling amongst researchers is that it is generally difficult to obtain a position space lorentz invariant doubly special. The motivation for the formulation of dsr is well founded and is based on the subtle. If one reference frame assigns precisely the same time to two events that are at different points in space, a reference frame that is moving relative to the first will generally assign different.
Lecture notes on special relativity macquarie university. Students will learn the basic tenets of both theories and will discuss current issues in black hole physics, gravitational waves, and quantum gravity. Pdf in this letter we generalize the dirac equation in the context of the magueijo smolin ms 1 approach to the doubly special relativity. This result also allows us to characterize more sharply the differences between the doubly special relativity framework and the framework o. The notes are designed to be comfortable to read at this size. Doubly special relativity dsr theory is a recently proposed theory with two observerindependent scales of velocity and mass, which is to describe a. Smolin and magueijo have suggested another theory dsr2 12 in a paper in which they argued that any dsr transformation group must be a nonlinear realization of the lorentz.
Double special relativity theories are the relativistic theories in which the transformations between inertial observers are characterized by two observer. Relativity both the special and general theories, quantum mechanics, and thermodynamics are the three major theories on which modern physics is based. Such a theory has been proposed by amelinocamelia as a kinematic structure which may underline quantum theory of relativity. In view of the importance of the issue for a consistent formulation of a dsr statistical mechanics and a dsr thermodynamics, we show that dsr models preserving the usual. Doubly special relativity and translation invariance. These theories are being called2 \ doubly special relativity dsr theories.
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