Skip to content
Vatican Observatory
  • About
    • Overview
    • Team
    • FAQ
  • Telescopes
    • Overview
    • Telescope Images
  • Latest
    • Overview
    • Resources
    • Press
    • Audio
    • Video
    • Research
    • Authors
      • FAQs
    • Newsletter
    • Tucson Meteor Cameras
  • Podcast
  • Education
    • Overview
    • Resource Center
    • Image Gallery
    • Summer School
    • Books
    • Software
    • Additional Resources
    • ACME
    • Ambassadors
  • Shop
  • Calendar
  • Support
    • Overview
    • Donate Now
    • Smart Ways to Give
    • Sacred Space Astronomy
      • View Content
    • Fr. Coyne Fundraiser
    • Bequests / Trusts
    • The Foundation
      • Newsletters
      • Annual Reports
  • Press
  • Specola Vaticana
  • Contact
    • Contact
  • About
    • Overview
    • Team
    • FAQ
  • Telescopes
    • Overview
    • Telescope Images
  • Latest
    • Overview
    • Resources
    • Press
    • Audio
    • Video
    • Research
    • Authors
      • FAQs
    • Newsletter
    • Tucson Meteor Cameras
  • Podcast
  • Education
    • Overview
    • Resource Center
    • Image Gallery
    • Summer School
    • Books
    • Software
    • Additional Resources
    • ACME
    • Ambassadors
  • Shop
  • Calendar
  • Support
    • Overview
    • Donate Now
    • Smart Ways to Give
    • Sacred Space Astronomy
      • View Content
    • Fr. Coyne Fundraiser
    • Bequests / Trusts
    • The Foundation
      • Newsletters
      • Annual Reports
  • Press
  • Specola Vaticana
  • Contact
    • Contact

Spooky Action at a Distance (Part Two)

By Dr. Brenda Frye  |  8 Nov 2016

Share:
  • Share on Facebook
  • Share on Twitter
  • Share on LinkedIn
  • Share via Email

The spookiness continues with the quantum mechanical notion of locality. Einstein proposed an experiment called an “Einstein box” to demonstrate that particles must have some way to directly affect one another, that they must observe locality.

He proposed that we consider a box in which we place one electron. Let us say we choose to start this experiment in Tucson, Arizona. At any given time, that electron can be anywhere in the box. The probability that it is in a particular place is given by a mathematical “wave” function.

Note the notion of the wave function is not that it describes our lack of understanding of where the particle is. Instead, it is as if the particle actually does exist in a mixture of different positions within the box. If we were to open the box suddenly and peer inside, then the moment we spot that electron the wave function is said to collapse to a single point.

Let us suppose that we resist the temptation to peek inside. Instead, we close our eyes and insert a partition to physically divide the box into two equal halves. If we do this in the right way, then we can preserve the same wave function as before, with the result that we still will not know in which half of the box the electron resides.

This story gets interesting if we package up the one half of the box and ship it somewhere far away, like Rome, Italy. Now where is that one electron?

If our friend in Rome opens the box and sees an electron, then suddenly there should be zero electrons in the half-box that stayed in Tucson. Likewise, if we open the box in Tucson, then the friend in Italy will be disappointed. So what is going on here?

How can two boxes separated by half a world instantly communicate with each other and know what to do? Isn’t this an example of spooky action at a distance? Einstein thought so! In the next installment we will consider another thought experiment that will take us a step closer towards understanding the state of this active field of quantum mechanics.

Share:
  • Share on Facebook
  • Share on Twitter
  • Share on LinkedIn
  • Share via Email

Sacred Space Astronomy

The Vatican Observatory’s official digital community and online magazine.

Become a Member

Recent Posts

Justine Siegemund, Google Doodle Scientist

By Mr. Christopher Graney  |  28 Mar 2023  |  Sacred Space Astronomy

From The Backyard: Seasons Change

By Fr. James Kurzynski  |  27 Mar 2023

Conjunction of the Moon and Pollux – March 29-30

By Robert Trembley  |  27 Mar 2023  |  Sacred Space Astronomy

Conjunction of the Moon and Mars – March 28

By Robert Trembley  |  27 Mar 2023  |  Sacred Space Astronomy

Archives

      • March
      • February
      • January
      • December
      • November
      • October
      • September
      • August
      • July
      • June
      • May
      • April
      • March
      • February
      • January
      • December
      • November
      • October
      • September
      • August
      • July
      • June
      • May
      • April
      • March
      • February
      • January
      • December
      • November
      • October
      • September
      • August
      • July
      • June
      • May
      • April
      • March
      • February
      • January
      • December
      • November
      • October
      • September
      • August
      • July
      • June
      • May
      • April
      • March
      • February
      • January
      • December
      • November
      • October
      • September
      • August
      • July
      • June
      • May
      • April
      • March
      • February
      • January
      • December
      • November
      • October
      • September
      • August
      • July
      • June
      • May
      • April
      • March
      • February
      • January
      • December
      • November
      • October
      • September
      • August
      • July
      • June
      • May
      • April
      • March
      • February
      • January
      • December
      • November
      • October
      • September
      • August
      • July
      • June
      • May
      • April
      • March
      • February
      • January
      • December
      • November
      • August
      • June
      • March
      • January
      • November
      • October
      • December
      • November
      • April
      • May
      • January
      • December
      • September
      • May
      • March
      • December
      • November
      • February

More Posts by
Dr. Brenda Frye

A Gift to Us?

By Dr. Brenda Frye  |  22 Aug 2020

Getting to Know a Neutron Star: How Heavy Can They Be?

By Dr. Brenda Frye  |  9 Jul 2020

The Flying Cell Phone to Alpha Centauri: Part Two

By Dr. Brenda Frye  |  21 Jun 2020

The Flying Cell Phone to Alpha Centauri: Part One

By Dr. Brenda Frye  |  28 May 2020

No Wine Before Its Time

By Dr. Brenda Frye  |  3 Jul 2018

Counting Exercise

By Dr. Brenda Frye  |  26 Jun 2018

View More

Newsletter

Upcoming astronomical events, scientific breakthroughs, philosophical reflections… just a few reasons to subscribe to our newsletter!

Vatican Observatory
  • About
  • Telescopes
  • Latest
  • Podcast
  • Education
  • Shop
  • Calendar
  • Support
  • Press
  • Specola Vaticana
  • Contact
Privacy Policy  |   Cookie Policy  |   Disclosure Statement

Podcast:

  • Apple Podcasts Listen onApple Podcasts
  • Spotify Listen onSpotify
  • Google Podcasts Listen onGoogle Podcasts
  • Stitcher Listen onStitcher
  • Amazon Alexa Listen onAmazon Alexa
  • TuneIn Listen onTuneIn
Made by Longbeard