Travelling in Time: How to Wholly Exist in Two Places at the Same Time

2006 ◽  
Vol 36 (3) ◽  
pp. 309-334 ◽  
Author(s):  
Kristie Miller

It is possible to wholly exist at multiple spatial locations at the same time. At least, if time travel is possible and objects endure, then such must be the case. To accommodate this possibility requires the introduction of a spatial analog of either relativising properties to times — relativising properties to spatial locations — or of relativising the manner of instantiation to times — relativising the manner of instantiation to spatial locations. It has been suggested, however, that introducing irreducibly spatially relativised or spatially adverbialised properties presents some difficulties for the endurantist. I will consider an objection according to which embracing such spatially relativised properties could lead us to reject mereology altogether in favour of a metaphysics according to which objects are wholly present at every space-time point at which they exist. I argue that although such a view is coherent, there are some good reasons to reject it. Moreover, I argue that the endurantist can introduce spatially relativised or adverbialised properties without conceding that objects lack spatial parts. Such a strategy has the additional advantage that it allows the endurantist not only to explain time travel, but also to reconcile our competing intuitions about cases of fission.

Author(s):  
Adrian Kent

We propose definitions and implementations of ‘S-money’—virtual tokens designed for high-value fast transactions on networks with relativistic or other trusted signalling constraints, defined by inputs that in general are made at many network points, some or all of which may be space-like separated. We argue that one significant way of characterizing types of money in space–time is via the ‘summoning’ tasks they can solve: that is, how flexibly the money can be propagated to a desired space–time point in response to relevant information received at various space–time points. We show that S-money is more flexible than standard quantum or classical money in the sense that it can solve deterministic summoning tasks that they cannot. It requires the issuer and user to have networks of agents with classical data storage and communication, but no long-term quantum state storage, and is feasible with current technology. User privacy can be incorporated by secure bit commitment and zero-knowledge proof protocols. The level of privacy feasible in given scenarios depends on efficiency and composable security questions that remain to be systematically addressed.


1985 ◽  
Vol AES-21 (3) ◽  
pp. 292-300 ◽  
Author(s):  
Peter Maybeck ◽  
William Zicker
Keyword(s):  

Author(s):  
Rodney Bartlett

In 1982, MIT physicist Frank Wilczek predicted and named ANYONS, quasiparticles (particle-like formations) that are confined to 2 dimensions and were discovered in 2020. The name might come from Prof. Wilczek's lighthearted comment "anything goes". This article's main goal is to show that anyons could be another name for 1) virtual particles, 2) Mobius strips, and 3) figure-8 Klein bottles. Along the way, we'll see the picture painted by the article confirm that Einstein's dream of gravitational-electromagnetic unity fits in with anyons being Mobius strips. The topological hypothesis offers an explanation of dark matter and dark energy. We'll also have encounters with intergalactic travel and imaginary computers. They really could exist but are imaginary in the sense that they use imaginary time (as well as space-time warping).


2007 ◽  
Vol 8 (1) ◽  
pp. 65
Author(s):  
Paul D. Esker ◽  
Karen S. Gibb ◽  
Philip M. Dixon ◽  
Forrest W. Nutter

Yellow crinkle disease of papaya is a serious threat to papaya production in Australia. Space-time point pattern analysis was used to study the spatial and temporal dependence of two phytoplasma strains that cause yellow crinkle: tomato big bud (TBB) and sweet potato little leaf V4 (SPLL-V4). Incidence data for both phytoplasma strains were obtained from a field study conducted in Katherine, NT, Australia, between January 1996 and May 1999. The primary ecological and epidemiological question of interest was to elucidate the scale of spatial or spatio-temporal aggregation of phytoplasma-infected papaya plants. The hypothesis was that there would be a contagion process, where TBB- and SPLL-V4-infected papaya would be aggregated and not random. To test this hypothesis, a point pattern spatial analysis using Monte Carlo simulation was initially applied to the incidence data. Results of this analysis suggested that SPLL-V4 infected papaya plants displayed aggregation with spatial dependence up to 30 m (10 to 15 plants along or across rows), whereas there was not strong evidence to suggest that TBB-infected papaya plants were aggregated. However, when a space-time point pattern analysis was subsequently used to simultaneously test for the interaction between space and time, there was strong evidence (P < 0.01 for SPLL-V4 and P < 0.10 for TBB) to suggest a space-time interaction for both SPLL-V4 and TBB. For SPLL-V4, a space-time risk window of approximately 10 months and 20 m was detected, whereas for TBB, this risk window was 5 months and 10 m. The results of these studies support the hypothesis that papaya infection by both phytoplasma strains appears to be the result of a contagion process, providing support for the contention that insect vectors are the most likely mechanism for acquisition, dispersal, and transmission. Accepted for publication 26 April 2007. Published 26 July 2007.


2011 ◽  
Vol 22 (6) ◽  
pp. 749-757 ◽  
Author(s):  
Marcello Chiodi ◽  
Giada Adelfio

2020 ◽  
Author(s):  
Deep Bhattacharjee

An arbitrary advanced civilization might have the technology to travel back and forth in time and that too within a large timescale like say ‘a thousand years’ into the past or future. But to us, in present day scenario, this ‘time travel’ seems impossible. Although many mathematical thesis have been published with sound theories about the structure and definitions’ of ‘time travels’ but still from an engineering feat, it’s practically impossible. Therefore, the time travel is a far more mathematical abstract concept and a source of science fiction for today’s physicists. However, theorists are not restrained by any limits or bounds and they likes to explore the plausibility of travelling through times and its fundamental overlying principles. Firstly, its necessary to develop a theory that is suitable for humans to travel in time like ‘without falling inside a black hole’ or ‘without any need of exotic matter’ or ‘without creating any paradoxes’ but we will consider ‘micro black hole and high gravity potentials’. So, to develop a more practical theory, its necessary that one needs to consider the factors which is not too hypothetical to be achieved by human beings at the present notion of technologies available to us. So, if such a theory can be achieved with a high degree of accuracy then the travelling through time will be possible by manipulating the circuits and machinery and creating a time machine after all at the end. However, travelling to future, although is theoretically plausible, travelling to past is always restricted due to the nature of ‘the birth of various paradoxes’ that may happen in due times. So, to extent the notion of casual loops without getting too far away with the absurdity of the physics, this paper will view the time from a new perspective and then it will aim to develop a theory so that its best fit within the current feats of technological challenges that we are facing today. Starting from the ‘relativity’ which first gives the scientific definition of ‘time travel’, ‘time’ as a whole has always been considered as 4th dimensions along with space and the other 3 spatial dimensions being orthogonal to them. But, what if there already exists an embedded 2-time dimension in our space-time and there is already existent ‘causal loops’ in our universe but what needs to be done is the action of a ‘temporal agent’ who can make the hidden 2nd dimensions of time prominent ‘from hiding’ and we are free to explore the ‘temporal loops’ in our space-time. This temporal agent can be any human beings with a high source of available technology or can be in any form of machinery like the ‘time machines’ which will allow the ‘embedded 2nd dimensions’ prominent from the hiding so that humans could explore the feats of ‘time travelling’. This paper is typically presented to deal with these ideas of 2nd time dimensions and causal loops in space-times where any object (or rather humans) can travel back and forth in time riding on these 2-time dimensions. My objective will always remain to focus ‘time’ from the perspectives of ‘2 dimensions’ in the form of a ‘circle’ rather than a linear straight line of 1 dimension and thereby manipulating the idea of this extra dimensions in such a way that, travelling through time can be achieved in practicality without getting washed away by too much abstract mathematics as theoretical physicists often likes to do. Its not quite easy to present time in such a form but I will try my best to do so and also keeping in mind that my theory is consistent with the current available technological challenges faced by experimental physicists and engineers in designing a time machine. A consistent theory is always necessary for practical implementation and that’s what I always intend to do and this paper is just the reflections of my ideas to provide an easy through to ‘time travel’ by focusing the extra hidden dimensions of time in nature. The possible outcome of these phenomena has been discussed thoroughly using logics &amp; mathematics which will insight into a far more in-depth concept by taking us in exploring the 2-Time Dimensions in this universe and the related outcome or consequences of this more than 1 Time Dimensions. Moreover, this paper aims to provide the repetition or Looping of Timelines in a 2D Minkowski lightcone with the help of (exponential wavefunctions) which results in the occurring of same event in a synchronic pattern along with a desired property which will prove that, ‘N” past timelines are connected with “N+1+1……” future timelines and it is the law of nature to select the appropriate future timelines related to the past timelines which have the least degrees of errors in the “exponential wavefunctions” introduced in this paper. We will give an insight about the metric by taking time as ‘imaginary’ and how it solves the ‘singularity problem’ from Schwarzschild and Lemaitre metrics respectively. Then the concept of spatial divergence has been used.


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