Next Big Future: Repulsive Casimir Force: Casimir-Lifshitz force experimentally verified
GoatGuy
· 11 months ago
Mayonnaise. That was the first material where the Casimir repulsive force was observed. The intrepid researcher was looking to figure out why mayonnaise is such a durable suspension, and moreover, why mayonnaises are largely nonlinear rheodynamic fluids. The Casimir repulsive force figures centrally into the dispersion parameters of the oil nanospheres that constitute the mayonnaise suspension.
In a series of discussions with researchers actively looking into all of the various Casimir forces, the net 'problem' with the Casimir force (which is NOT a problem, but just a physics based reality) is that rather like our macro-scale Maxwell's Laws that completely describe electromagnetics, the Casimir forces are also linear through all path integrals.
Analogous to Gauss's law for magnetism ( del-B equals zero ... in differential form, or circ-integral B dA equals zero ), which states that the integration of force or flux change over any closed path in a magnetic field yields precisely zero net power, the Casimir forces also appear at all scales to be similarly closed to either energy consuming or energy delivering paths.
NET? Interesting research, and there will be many 'things' that will come from it. But I'm not holding great hopes for a new kind of space propulsion. (One of the other leading candidates is unidirectional hyperpower laser propulsion... where the orders of magnitude clearly could deliver results, but the requirements for power-to-propulsion production remain almost fictionally distant.)
GoatGuy
nanoqed
· 11 months ago
Casimir extended the microscopic van der Waals force between atoms in a gas to the attraction between macroscopic bodies in a vacuum. However, recent experiments have suggested that the Casimir force can be changed from attraction to repulsion by immersing micron sized gold and silicon structures in liquid bromobenzene.
But this experiment not only falsely presupposes the Casimir force exists, but then extends that falsity to conclude the attractive Casimir force can be changed to repulsion. Indeed, the Casimir force is shown to not exist because Casimir did not conserve the EM radiation in the gap between parallel plates, for if he would have, Casimir would have found the frequency of the EM radiation increases by QED as the gap decreases because the EM energy in the gap must be constant. The gradient of the constant EM energy with respect to the gap therefore vanishes and there is no Casimir force. See www.nanoqed.net at link "Casimir"
If there is no Casimir force, what then is being measured?
Since all measured Casimir forces only occur at gaps less than 200 nm, the EM radiation in the gap reaches VUV levels and the plates charge oppositely by the photoelectric effect. Therefore, the attractive force measured in Casimir experiments is electrostatic caused by the QED charging of the plates by VUV radiation. The usual attractive QED induced electrostatic force of oppositely charged gold and silicon structures is changed to repulsion upon immersion in bromobenzene because the latter is an electron scavenger that alters charge distribution.
All Comments
In a series of discussions with researchers actively looking into all of the various Casimir forces, the net 'problem' with the Casimir force (which is NOT a problem, but just a physics based reality) is that rather like our macro-scale Maxwell's Laws that completely describe electromagnetics, the Casimir forces are also linear through all path integrals.
Analogous to Gauss's law for magnetism ( del-B equals zero ... in differential form, or circ-integral B dA equals zero ), which states that the integration of force or flux change over any closed path in a magnetic field yields precisely zero net power, the Casimir forces also appear at all scales to be similarly closed to either energy consuming or energy delivering paths.
NET? Interesting research, and there will be many 'things' that will come from it. But I'm not holding great hopes for a new kind of space propulsion. (One of the other leading candidates is unidirectional hyperpower laser propulsion... where the orders of magnitude clearly could deliver results, but the requirements for power-to-propulsion production remain almost fictionally distant.)
GoatGuy
But this experiment not only falsely presupposes the Casimir force exists, but then extends that falsity to conclude the attractive Casimir force can be changed to repulsion. Indeed, the Casimir force is shown to not exist because Casimir did not conserve the EM radiation in the gap between parallel plates, for if he would have, Casimir would have found the frequency of the EM radiation increases by QED as the gap decreases because the EM energy in the gap must be constant. The gradient of the constant EM energy with respect to the gap therefore vanishes and there is no Casimir force. See www.nanoqed.net at link "Casimir"
If there is no Casimir force, what then is being measured?
Since all measured Casimir forces only occur at gaps less than 200 nm, the EM radiation in the gap reaches VUV levels and the plates charge oppositely by the photoelectric effect. Therefore, the attractive force measured in Casimir experiments is electrostatic caused by the QED charging of the plates by VUV radiation. The usual attractive QED induced electrostatic force of oppositely charged gold and silicon structures is changed to repulsion upon immersion in bromobenzene because the latter is an electron scavenger that alters charge distribution.