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X Demographics
Mendeley readers
Attention Score in Context
| Title |
Quantum asymmetry between time and space
|
|---|---|
| Published in |
Proceedings of the Royal Society A: Mathematical, Physical & Engineering Sciences, January 2016
|
| DOI | 10.1098/rspa.2015.0670 |
| Pubmed ID | |
| Authors |
Joan A. Vaccaro |
| Abstract |
An asymmetry exists between time and space in the sense that physical systems inevitably evolve over time, whereas there is no corresponding ubiquitous translation over space. The asymmetry, which is presumed to be elemental, is represented by equations of motion and conservation laws that operate differently over time and space. If, however, the asymmetry was found to be due to deeper causes, this conventional view of time evolution would need reworking. Here we show, using a sum-over-paths formalism, that a violation of time reversal (T) symmetry might be such a cause. If T symmetry is obeyed, then the formalism treats time and space symmetrically such that states of matter are localized both in space and in time. In this case, equations of motion and conservation laws are undefined or inapplicable. However, if T symmetry is violated, then the same sum over paths formalism yields states that are localized in space and distributed without bound over time, creating an asymmetry between time and space. Moreover, the states satisfy an equation of motion (the Schrödinger equation) and conservation laws apply. This suggests that the time-space asymmetry is not elemental as currently presumed, and that T violation may have a deep connection with time evolution. |
X Demographics
The data shown below were collected from the profiles of 85 X users who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United States | 22 | 26% |
| United Kingdom | 6 | 7% |
| Italy | 4 | 5% |
| France | 3 | 4% |
| India | 2 | 2% |
| Japan | 2 | 2% |
| Canada | 2 | 2% |
| Slovenia | 1 | 1% |
| Puerto Rico | 1 | 1% |
| Other | 4 | 5% |
| Unknown | 38 | 45% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 62 | 73% |
| Scientists | 18 | 21% |
| Science communicators (journalists, bloggers, editors) | 4 | 5% |
| Practitioners (doctors, other healthcare professionals) | 1 | 1% |
Mendeley readers
The data shown below were compiled from readership statistics for 79 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United Kingdom | 4 | 5% |
| Hungary | 2 | 3% |
| Italy | 1 | 1% |
| Canada | 1 | 1% |
| United States | 1 | 1% |
| Unknown | 70 | 89% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Researcher | 23 | 29% |
| Student > Ph. D. Student | 9 | 11% |
| Student > Master | 8 | 10% |
| Student > Bachelor | 6 | 8% |
| Other | 6 | 8% |
| Other | 14 | 18% |
| Unknown | 13 | 16% |
| Readers by discipline | Count | As % |
|---|---|---|
| Physics and Astronomy | 42 | 53% |
| Agricultural and Biological Sciences | 5 | 6% |
| Engineering | 3 | 4% |
| Chemistry | 3 | 4% |
| Materials Science | 2 | 3% |
| Other | 11 | 14% |
| Unknown | 13 | 16% |
Attention Score in Context
This research output has an Altmetric Attention Score of 264. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 21 February 2024.
All research outputs
#139,785
of 25,743,152 outputs
Outputs from Proceedings of the Royal Society A: Mathematical, Physical & Engineering Sciences
#21
of 3,637 outputs
Outputs of similar age
#2,188
of 401,722 outputs
Outputs of similar age from Proceedings of the Royal Society A: Mathematical, Physical & Engineering Sciences
#1
of 47 outputs
Altmetric has tracked 25,743,152 research outputs across all sources so far. Compared to these this one has done particularly well and is in the 99th percentile: it's in the top 5% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 3,637 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 12.5. This one has done particularly well, scoring higher than 99% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 401,722 tracked outputs that were published within six weeks on either side of this one in any source. This one has done particularly well, scoring higher than 99% of its contemporaries.
We're also able to compare this research output to 47 others from the same source and published within six weeks on either side of this one. This one has done particularly well, scoring higher than 97% of its contemporaries.