Can anything be colder than absolute zero?

Answer 1

The opposite of absolute zero is called Planck Temperature.

As of now it is the highest possible temperature that matter can exist at.

It is approximately 1.41679 x 10^32 Kelvin.

Beyond this temperature everything turns to energy, all subatomic particles break down and become individual black holes destroying space and time.

The universe has already reached this temperature once during the first instant of the Big Bang.

Answer 2

No. The third law of thermodynamics says you cannot cool anything to absolute zero. It is the lowest possible energy state an object could obtain. Scientists have cooled objects to temperatures very close to absolute zero.

Answer 3

In a certain sense, there is.

Ordinarily, adding a positive amount of heat energy dE to a system increases its entropy

by a positive amount dS. Since dS = (1/T)dE (where T is the temperature, and assuming

we keep the volume, pressure etc. constant) it follows that T is positive.

However, in certain systems the energy has a maximum possible value, and the entropy

actually decreases as the system approaches that maximum. In such systems, near the

maximum-energy state we'd have dS < 0 even though dE > 0, and therefore the absolute

temperature T is negative.

Example: spins in a magnetic field

A classic example of this type of system is a lattice of spins (with negligible mutual interactions)

in an externally-applied magnetic field.

At zero absolute temperature, all the spins are aligned by the field. As the temperature

increases, thermal motion introduces disorder (the entropy increases) and the proportion

of parallel spins decreases. At sufficiently high temperatures, the thermal motion will

completely mask the effects of the external field: the system is completely disordered,

with half the spins parallel to the field, and half anti-parallel. Note that the system has

now reached a state of maximum entropy.

Now, by introducing a pulse of radio-frequency electromagnetic radiation, we can increase

the energy of the system further by flipping some of the spins. In fact, we can force a

situation where more than half of the spins are anti-parallel to the external field. As we

continue to flip the spins, the energy of the system increases - but notice, that we are

now actually reducing the entropy of the system, because we are moving further away

from the state of maximum disorder. In other words, dS< 0 even though dE > 0, and

therefore the absolute temperature is negative.

More info

Check out the Wikipedia article in the related links section.

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The question can be interpreted as having carefully avoided

the use of the word 'temperature', so in addition to the above

elegant and erudite analysis, I submit the following numbers:

-- elevation of the sea floor of the Marianas Trench,

expressed in meters above mean sea level;

-- available balance in the bank account of Spain, Greece, USA, etc.,

expressed in the unit of currency of any of them.

Answer 4

No, absolute zero (-273.15°C or 0 Kelvin) is the lowest possible temperature where particles cease to move. It is not possible for anything to be colder than absolute zero according to the laws of physics.

Answer 5

No, absolute 0 is a myth. you can not ever, ever, ever, get to a temp. that has no thermal heat. even if you have -1000000 degrees C it would still have at least some heat.

Answer 6

No. That is why it is called absolute zero.