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Astronomy and Cosmology
Cosmology
"It from Bit" and the multiverse?
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[QUOTE="Klystron, post: 6220626, member: 614295"] I noticed after several months no replies to this thread not from lack of information perhaps but from a surfeit? Your references are intriguing, providing much food for thought. Excerpt from Linde I have read, enjoyed and contemplated physics and cosmology books that I encountered written by your cited authors including Weinberg, Everett, Wheeler and Tegmark among many others without arriving at a clear relatable model of the 'multiverse'. Given the title of the thread and the penultimate citation concerning [URL="https://en.wikipedia.org/wiki/Digital_physics#Wheeler's_%22it_from_bit%22"]Wheeler's digital physics,[/URL] I found the concepts of discrete and continuous data measurements very useful in my work as a computer scientist; possibly relevant. Tasked with coding near-time data collection systems for computational fluid dynamics (CFD) experiments, the requirements indicated two essential forms. [LIST=1] [*]Analog -- continuous -- streamed real-time data. [*]Digital -- discrete -- near-time measurements. [/LIST] Given practical limitations of then current PDP and VAX computer systems including limited information storage ability, "continuous" devolved to streaming samples as rapidly as possible during critical periods of the experiment with minimal pre-filtering until some portion of allocated space became full or other parameters met, downloading the data from the front-end processors ASAP, repeat. Continuous data collection benefited greatly from parallel processors, high-speed connections and large data buffer sizes. Discrete data collection allowed more time for filtering and pre-computation of selected benchmark values to help guide the experiment in near-time. Many different measurements were performed always including internal and external time hacks and synchronization signals to recreate experimental conditions. Discrete data collection benefited from on-the-fly computation, sparse matrix and database concepts, and even data compression. The consensus from your references indicate that the physical world appears continuous at the limits of our measurements. The "digital world" within our computer systems appears discrete. [/QUOTE]
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"It from Bit" and the multiverse?
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