The laws of thermodynamics are some of the most important principles in modern physics, defining how temperature, energy, and entropy behave under various circumstances. The first law of thermodynamics states that energy cannot be created or destroyed, only transferred or converted from one form to another. The second law of thermodynamics establishes the concept of entropy as a physical property of a thermodynamic system, predicting whether processes are forbidden and providing criteria for spontaneous processes. While the first law allows for both a cup falling off a table and breaking and the reverse process of the fragments reassembling, the second law only allows for the former.
Despite the importance of these laws, physicists have recently found a potential loophole in the second law, which could create scenarios where entropy, or disorder, decreases over time. This goes against the second law's assertion that the state of a natural system can be reversed but not without increasing the entropy of the system's surroundings. The researchers at the Argonne National Laboratory have applied quantum information theory to condensed matter physics to develop a new quantum H-theorem model, which they claim shows certain circumstances where entropy might decrease, at least temporarily.
This discovery has sparked controversy, and the researchers are planning to expand their team to design a proof-of-concept system based on their model.
Characteristics | Values |
---|---|
First Law of Thermodynamics | Energy cannot be created or destroyed |
Second Law of Thermodynamics | For a spontaneous process, the entropy of the universe increases |
What You'll Learn
Create a system where entropy decreases
The second law of thermodynamics states that the entropy of an isolated system left to spontaneous evolution cannot decrease with time. As a result, isolated systems evolve toward thermodynamic equilibrium, where the entropy is highest. However, researchers at the US Department of Energy's Argonne National Laboratory say they might have discovered a loophole in the Second Law of Thermodynamics, where the march of entropy can go in the opposite direction—on a microscopic scale and in the short term.
To create a system where entropy decreases, energy transfer is necessary. For example, if you pick up marbles scattered on the floor and put them in a cup, your work has decreased the entropy of that system. Similarly, if you gather iron ore from the ground and convert it into steel to build a bridge, your work has decreased the entropy of that system. Energy coming from the sun can also decrease the entropy of local systems on Earth. However, the overall entropy of the rest of the universe increases by a greater amount, and the second law of thermodynamics is not violated.
Another way to think about this is in terms of temperature. Heat transfers energy spontaneously from higher to lower-temperature objects, but never spontaneously in the reverse direction, as this would decrease the entropy of the overall system. For example, when you mix equal masses of water that are originally at two different temperatures, the result is water at an intermediate temperature. The mixing decreases the entropy of the hotter water but increases the entropy of the colder water by a greater amount, producing an overall increase in entropy.
In summary, to create a system where entropy decreases, you can perform work or transfer energy to decrease the entropy of a specific part of the system. However, this will always result in an increase in the entropy of the rest of the system or the universe as a whole, in accordance with the second law of thermodynamics.
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Achieve a negative entropy gain
Achieving a negative entropy gain is a highly complex and controversial concept, but researchers at the US Department of Energy's Argonne National Laboratory have made progress in this area. The Second Law of Thermodynamics, which deals with the transition of energy within a system from 'usable' to 'unusable', states that as usable energy is lost, entropy or disorder increases, and this progression towards disorder can never be reversed.
However, the Argonne Lab team investigated the H-theorem, a statistical concept underpinning the Second Law, and applied quantum information theory to come up with a new quantum H-theorem model. This model revealed certain circumstances in which entropy might decrease temporarily. They compared their findings to Maxwell's Demon, an 1867 thought experiment by physicist James Clerk Maxwell, which proposed a scenario where a quantum demon controls the flow of temperature between two rooms, causing one to warm up as the other cools down.
The Argonne Lab team's mathematical model demonstrates how a quantum system could be created where there is a temporary "negative entropy gain", or a decrease in entropy. This violation of the Second Law, even if only on a local scale, has far-reaching implications. It suggests the possibility of a local quantum perpetual motion machine, challenging one of the most fundamental principles in modern physics.
While the concept of achieving a negative entropy gain is intriguing, it is important to note that it is a highly advanced and controversial topic within the field of physics. The research conducted by the Argonne Lab team provides valuable insights, but further exploration and experimentation are necessary to fully comprehend and harness the potential of negative entropy gain.
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Break the first law to break the second law
The First Law of Thermodynamics states that energy cannot be created or destroyed. The Second Law of Thermodynamics deals with the transition of energy within a closed or isolated system from 'usable' to 'unusable'. As usable energy decreases, unusable energy increases, and entropy, or disorder, increases. The Second Law of Thermodynamics states that as this usable energy is lost, chaos increases, and this progression towards disorder can never be reversed.
To break the First Law of Thermodynamics, one would have to create or destroy energy. This is impossible, as the law specifically prohibits this. However, researchers at the US Department of Energy's Argonne National Laboratory say they may have discovered a loophole in the Second Law of Thermodynamics, which could allow for the creation of a system where entropy decreases.
To break the First Law to break the Second Law, one would have to find a way to create or destroy energy in a way that specifically leads to a decrease in entropy. This seems highly improbable, as the First Law is an absolute law that cannot be broken. However, the Argonne Lab team's discovery of a potential loophole in the Second Law could be a starting point for further exploration.
The Argonne Lab team took a quantum information theory approach to develop a new quantum H-theorem model. This model showed that under certain circumstances, entropy might decrease temporarily. They compared this to Maxwell's Demon, an 1867 thought experiment by physicist James Clerk Maxwell. Maxwell proposed that a tiny quantum demon controlling the flow of particles between two rooms could decrease entropy in one room while increasing it in the other.
The Argonne Lab team's work is highly theoretical and controversial, and it remains to be seen if they can design a proof-of-concept system. However, their discovery highlights the potential for creating local quantum perpetual motion machines, which could have far-reaching implications.
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Use quantum mechanics to break the second law
The second law of thermodynamics is a cornerstone of physics, governing the march of time and the flow of energy, and setting constraints on what is physically possible. It states that the entropy, or disorder, of an isolated system will always increase or remain constant over time. It never decreases.
However, the world of quantum mechanics and thought experiments like Maxwell's Demon pose fascinating challenges to our understanding of this seemingly invincible law.
In 2016, researchers at the US Department of Energy's Argonne National Laboratory found a loophole in the second law of thermodynamics, where the march of entropy can go in the opposite direction, at least on a microscopic scale and in the short term. They took quantum information theory and applied it to condensed matter physics to come up with a new quantum H-theorem model. Within this model, there were certain circumstances in which entropy might decrease temporarily.
The team's findings revealed how the second law of thermodynamics functions when applied to the smallest scales of the microscopic world and calculated the maximum probability of observing a violation. They found that the probability of the law being violated is virtually zero for large objects, but for small quantum objects, it can play a significant role.
These findings are critical to nanoscale devices and the rapidly developing field of quantum technologies.
While the second law of thermodynamics holds most of the time, it is possible to create a quantum system where there is a temporary "negative entropy gain", or a decrease in entropy, at least on a local scale. This provides a platform for the practical realization of a quantum Maxwell's Demon, which could make a local quantum perpetual motion machine possible.
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Break the second law in a non-equilibrium system
The second law of thermodynamics states that heat always flows spontaneously from hotter to colder regions of matter. In other words, it deals with the transition of energy within a system from 'usable' to 'unusable'. As usable energy within a closed or isolated system decreases, and unusable energy increases, entropy also increases. Entropy is a measure of the randomness or disorder within a closed or isolated system.
The second law of thermodynamics can be broken in a non-equilibrium system by creating a system in which entropy decreases. Researchers at the US Department of Energy's Argonne National Laboratory say they might have discovered a loophole in the Second Law of Thermodynamics, where the march of entropy can go in the opposite direction—on a microscopic scale, at least, and only in the short term. They investigated a statistical concept that underpins the Second Law, called the H-theorem. In its most simple form, the H-theorem describes how if you open a door between two rooms—one hot and one cold—they will eventually settle into a lukewarm equilibrium.
To get a more realistic idea of how individual molecules would behave according to the H-theorem, the Argonne Lab team decided to approach it on a quantum scale. They did this by taking quantum information theory, which is based on a bunch of abstract mathematical systems, and applied it to condensed matter physics, to come up with a new quantum H-theorem model. They say that within their new quantum H-theorem model, there were certain circumstances in which entropy might actually decrease—temporarily, at least.
They compare the results to Maxwell's Demon - an 1867 thought experiment by physicist James Clerk Maxwell. Maxwell proposed that if a tiny, quantum demon sat at the door between two lukewarm rooms, and only let through particles travelling at certain speeds, it could effectively control the flow of temperature, causing one room to warm up as the other one cools.
The Argonne Lab team has now taken things a step further by coming up with a mathematical model to show how a quantum system could be created where there is a temporary "negative entropy gain" - in other words, a decrease in entropy.
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Frequently asked questions
The first law of thermodynamics states that energy cannot be created or destroyed. However, it is possible to create the illusion of breaking this law by drawing energy from an external source. For example, a perpetual motion machine like the Cox Timepiece clock, which never needs to be wound, can be powered by changes in barometric pressure.
The second law of thermodynamics states that the entropy of an isolated system will always increase, and the progression towards disorder can never be reversed. However, researchers at the Argonne National Laboratory have discovered a loophole where entropy might decrease on a microscopic scale and in the short term. They developed a mathematical model for a quantum system where there is a temporary "negative entropy gain", paving the way for a local quantum perpetual motion machine.
One way to break both laws simultaneously is to exploit quantum physics. By controlling the billions of quantum events that are random for most, you can teleport matter/energy from random locations, giving the appearance of breaking the first law. Simultaneously, you can reverse entropy by controlling the random quantum decisions that produce it.
In fiction, characters often break the laws of thermodynamics through magical or divine means. However, some authors strive to create more scientifically grounded explanations. For example, in the web serial *Worm*, characters with superpowers are connected to extra-dimensional supercomputers that manipulate micro-wormholes to achieve seemingly impossible feats.