What is Quantum levitation: Definition and 11 Discussions

In quantum field theory, the Casimir effect is a physical force acting on the macroscopic boundaries of a confined space which arises from the quantum fluctuations of the field. It is named after the Dutch physicist Hendrik Casimir, who predicted the effect for electromagnetic systems in 1948.
In the same year, Casimir together with Dirk Polder described a similar effect experienced by a neutral atom in the vicinity of a macroscopic interface which is referred to as Casimir–Polder force. Their result is a generalization of the London–van der Waals force and includes retardation due to the finite speed of light. Since the fundamental principles leading to the London–van der Waals force, the Casimir and the Casimir–Polder force, respectively, can be formulated on the same footing, the distinction in nomenclature nowadays serves a historical purpose mostly and usually refers to the different physical setups.
It was not until 1997 that a direct experiment by S. Lamoreaux quantitatively measured the Casimir force to within 5% of the value predicted by the theory.The Casimir effect can be understood by the idea that the presence of macroscopic material interfaces, such as conducting metals and dielectrics, alters the vacuum expectation value of the energy of the second-quantized electromagnetic field. Since the value of this energy depends on the shapes and positions of the materials, the Casimir effect manifests itself as a force between such objects.
Any medium supporting oscillations has an analogue of the Casimir effect. For example, beads on a string as well as plates submerged in turbulent water or gas illustrate the Casimir force.
In modern theoretical physics, the Casimir effect plays an important role in the chiral bag model of the nucleon; in applied physics it is significant in some aspects of emerging microtechnologies and nanotechnologies.

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  1. K

    I Difference between electrodynamic suspension (EDS) & quantum levitation?

    What is the difference between electrodynamic suspension (EDS) in maglev trains and quantum levitation? I'm having trouble distinguishing the difference between both.
  2. K

    B IB Physics Extended Essay - Quantum Levitation

    I've decided to focus my essay on quantum locking: including superconductors (YBCO), the Meissner Effect. I have access to the materials needed to experiment with this topic (materials from quantumlevitation.com). Could anyone help me formulate an appropriate research question for my Extended...
  3. K

    B I formulating a research question for my Extended Essay

    Hello, I am a student in the IB Diploma course. I've decided to focus my essay on quantum locking: including superconductors (YBCO), the Meissner Effect. I have access to the materials needed to experiment with this topic (materials from quantumlevitation.com). Could anyone help me formulate an...
  4. P

    Quantum Locking and the Earth's Magnetic Field

    Don't know if this is the right place to post this, but it seemed like the best place to start. I'm wondering how much stronger would the Earth's magnetic field need to be in order to make quantum levitation using Earth's magnetic field alone a possibility. Bonus: Effects the change in strength...
  5. Troy Barnes

    Why can't we make a space elevator using Quantum Levitation?

    Why can't we make a space elevator out of separate rings that are stacked over each other through Quantum Levitation? You know, have hollow rings that are quantum locked over each other, like in this video That way, the ladder freely moves around and changes shape, but would still be "intact"...
  6. Phizix

    Can a Small YBa2Cu3O7 Disk Navigate a Ring Magnet Track in Quantum Levitation?

    Okay so I am a high school student so please don't hate me if this is a dumb question. I'm am doing a Science Fair Project in a couple of months and I decided to start thinking of some ideas. I'm thinking of doing Quantum Levitation (Quantum Locking) and the science behind it. So as most of...
  7. 4

    Building a Quantum Levitation device

    I'm confident that most of us have seen the advancements in quantum levitation recently, and this has aroused questions among the geek community ( us : ) ) Anyway, if I were to, hypothetically, want to build one... How do I- *cough*- one do such a thing. What equipment and supplies are in play...
  8. T

    Can any magnet achieve quantum levitation?

    This video is so amazing i am simply awestruck by this phenomena, but i have a few questions. What makes it so that it can float and stay in the same position? Could you do this with any magnet or does t have to be the special saphire with gold coating for protection like in the video? And would...
  9. M

    Quantum levitation and quantum locking applications

    Hello Everyone, I'm brand new to the forum as a poster, although I have been quietly reading the very interesting discussions going on here for a while! I'm hoping to slowly emerge from the shadows and start posting myself. Whilst I am by no means an expert in Physics, I do love the subject...
  10. D

    Quantum Levitation: Examining Effects of Aerogel

    Hello people. I pose the question. what would be the result of using Aerogel which we know retains heat to slow down the process of quantum levitation.
  11. W

    Amazing Quantum Levitation Demonstration Video

    I found this great demonstration video of quantum levitation and just had to share it. http://www.youtube.com/watch?feature=player_embedded&v=Ws6AAhTw7RA