<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE article  PUBLIC "-//NLM//DTD Journal Publishing DTD v3.0 20080202//EN" "http://dtd.nlm.nih.gov/publishing/3.0/journalpublishing3.dtd"><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" dtd-version="3.0" xml:lang="en" article-type="research article"><front><journal-meta><journal-id journal-id-type="publisher-id">JMP</journal-id><journal-title-group><journal-title>Journal of Modern Physics</journal-title></journal-title-group><issn pub-type="epub">2153-1196</issn><publisher><publisher-name>Scientific Research Publishing</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.4236/jmp.2014.51002</article-id><article-id pub-id-type="publisher-id">JMP-41970</article-id><article-categories><subj-group subj-group-type="heading"><subject>Articles</subject></subj-group><subj-group subj-group-type="Discipline-v2"><subject>Physics&amp;Mathematics</subject></subj-group></article-categories><title-group><article-title>
 
 
  Measuring a Quantum System’s Classical Information
 
</article-title></title-group><contrib-group><contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>ohn</surname><given-names>L. Haller Jr.</given-names></name><xref ref-type="aff" rid="aff1"><sub>1</sub></xref><xref ref-type="corresp" rid="cor1"><sup>*</sup></xref></contrib></contrib-group><aff id="aff1"><label>1</label><addr-line>CCC Information Services, Data Science, Chicago, USA</addr-line></aff><author-notes><corresp id="cor1">* E-mail:<email>jlhaller@gmail.com</email></corresp></author-notes><pub-date pub-type="epub"><day>15</day><month>01</month><year>2014</year></pub-date><volume>05</volume><issue>01</issue><fpage>8</fpage><lpage>16</lpage><history><date date-type="received"><day>November</day>	<month>21,</month>	<year>2013</year></date><date date-type="rev-recd"><day>December</day>	<month>18,</month>	<year>2013</year>	</date><date date-type="accepted"><day>January</day>	<month>5,</month>	<year>2014</year></date></history><permissions><copyright-statement>&#169; Copyright  2014 by authors and Scientific Research Publishing Inc. </copyright-statement><copyright-year>2014</copyright-year><license><license-p>This work is licensed under the Creative Commons Attribution International License (CC BY). http://creativecommons.org/licenses/by/4.0/</license-p></license></permissions><abstract><p><html>
 <head></head>
 
   In the governing thought, I find an equivalence between the classical information in a quantum system and the integral of that system’s energy and time, specifically <img src="Edit_f1895aa2-779a-4f0e-a651-416aca58f3b3.bmp" width="59" height="20" alt="" />, in natural units. I solve this relationship in four ways: the first approach starts with the Schrodinger Equation and applies the Minkowski transformation; the second uses the Canonical commutation relation; the third through Gabor’s analysis of the time-frequency plane and Heisenberg’s uncertainty principle; and lastly by quantizing Brownian motion within the Bernoulli process and applying the Gaussian channel capacity. In support I give two examples of quantum systems that follow the governing thought: namely the Gaussian wave packet and the electron spin. I conclude with comments on the discretization of space and the information content of a degree of freedom. 
 
</html></p></abstract><kwd-group><kwd>Energy; Time; Information; Entropy; Rate; Capacity; Brownian Motion; Quantum of Action; Quantum of Information; Discrete Space; Discrete Time; Spin</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="scirp.41970-ref1"><label>1</label><mixed-citation publication-type="other" xlink:type="simple">J. Gantz and D. Reinsel, “The Digital Universe in 2020,” IDC, Framingham, 2012.</mixed-citation></ref><ref id="scirp.41970-ref2"><label>2</label><mixed-citation publication-type="other" xlink:type="simple">J. Manyika, et al., “Big Data: The Next Frontier for Innovation, Competition, and Productivity,” McKinsey Global Institute, San Francisco, 2011.</mixed-citation></ref><ref id="scirp.41970-ref3"><label>3</label><mixed-citation publication-type="other" xlink:type="simple">L. 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