Physicists create matter with 'negative mass'

Physicists at the University of Washington, USA have successfully created a liquid of ultracold atoms with negative mass, contrary to conventional physical principles. When you push this liquid, it does not move in the direction that is pushed but moves in the opposite direction.

According to the physical hypothesis, matter with negative mass is the same as the charge with both yin and yang. And the existence of negative mass does not break the physical principles.

Physicists create matter with 'negative mass' Picture 1

Newton's second law of motion: F = ma

1. F is the force acting on the object.
2. m is the volume.
3. a is the acceleration of the object.

When a = F / m

According to this formula, if an object has a negative mass, it will have negative acceleration.

For ease of understanding, you can imagine when you push a sliding glass cup on the table, but it will move in the opposite direction with your hand. Negative mass exists in the universe without violating general relativity.

To create this miraculous liquid, the team used lasers to cool rubidium atoms to near absolute zero, creating a Bose-Einstein condensate . At that time, rubidium atoms move very slowly and act as waves with locations that cannot be determined accurately, they do not follow the principles of classical physics.

Rubidium atoms synchronize with each other and move uniformly, forming super liquids that can flow without losing energy due to friction.

Physicists create matter with 'negative mass' Picture 2

After that, scientists continued to use lasers to keep the super fluid alive at very cold temperatures, to trap it in a space like a bowl smaller than 100 micrometers. Meanwhile, this super liquid has a normal mass.

The team then used a second set of lasers to push rubidium atoms back and forth to change their spin, breaking through the space that contained it and allowing super fluid to spill out so fast it seemed It has a negative volume.

According to Michael Forbes, a member of the research team, " Once you push, the fluid accelerates backwards like rubidium hits an invisible wall . "

Scientists in the research group believe that the liquid they create is the material "behaves like it has a negative mass" but does not produce negative mass as in the theory of theoretical physics. But this research is still a step forward in modern physics that helps to study the problems in the universe such as black holes, dark energy, neutron stars . in the future.

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