{"id":550,"date":"2025-07-11T04:23:04","date_gmt":"2025-07-11T04:23:04","guid":{"rendered":"https:\/\/www.newsbeep.com\/us\/550\/"},"modified":"2025-07-11T04:23:04","modified_gmt":"2025-07-11T04:23:04","slug":"new-theory-proposes-the-universe-collapsed-itself-into-reality-solving-schrodingers-cat-paradox","status":"publish","type":"post","link":"https:\/\/www.newsbeep.com\/us\/550\/","title":{"rendered":"New theory proposes the universe collapsed itself into reality, solving Schr\u00f6dinger\u2019s cat paradox"},"content":{"rendered":"

In the strange world of quantum mechanics, objects can exist in several states at once. This concept, called superposition, is one of the most puzzling features of quantum theory<\/a>. A particle, for example, can spin in multiple directions at the same time until someone measures it. <\/p>\n

But outside of the lab, the everyday world doesn\u2019t behave this way. Planets, stars, and even cats don\u2019t appear in multiple states at once. The universe follows predictable rules, behaving classically according to Einstein\u2019s theory of general relativity. So, what causes the shift from quantum oddities to the normal, classical behavior we see around us?<\/p>\n

That question has haunted scientists for decades. A team led by Matteo Carlesso at the University of Trieste<\/a> may have found a promising answer. Their recent study, published in the Journal of High Energy Physics<\/a>, proposes a modified version of quantum mechanics that allows the universe to transition naturally from quantum weirdness to classical order. <\/p>\n

Instead of needing an outside observer to collapse a system into a single state, their approach introduces self-induced collapse. In this model, systems interact with themselves and spontaneously settle into one outcome. This could explain how the entire universe, which has no external observer, ended up obeying classical rules.<\/p>\n

According to quantum mechanics, an initial superposition of the Universe \u03a8 = \u03a8\u03bb1 + \u03a8\u03bb2 + \u03a8\u03bb3 + \u03a8\u03bb4 at time t0 is conserved under the unitary dynamics of the Schr\u00f6dinger equation. (CREDIT: Journal of High Energy Physics) Bridging the Quantum-Classical Divide<\/p>\n

At the center of this mystery is something called the quantum measurement problem. Quantum mechanics<\/a> says that particles remain in a superposition of states until a measurement forces them into a definite one. But the theory doesn\u2019t clearly define what counts as a \u201cmeasurer.\u201d Physicist John Bell once asked, \u201cWhat exactly qualifies some physical systems to play the role of measurer?\u201d<\/p>\n

This leads to strange thought experiments, like Schr\u00f6dinger\u2019s cat. In it, a cat inside a sealed box is both alive and dead until the box is opened. In theory, the cat\u2019s fate stays undecided until someone looks. But cats don\u2019t actually live in such bizarre states. So what breaks the superposition?<\/p>\n

Carlesso and his team argue that the answer lies in how quantum systems scale. While atoms and small particles remain in superposition<\/a> until measured, larger systems may collapse on their own. They revised the famous Schr\u00f6dinger equation\u2014the rulebook of quantum mechanics\u2014to include extra terms. These new terms introduce randomness and self-interaction, causing spontaneous collapse of the wavefunction.<\/p>\n

The larger the system, the more likely it is to collapse quickly. This explains why humans, planets, and the universe itself don\u2019t appear in multiple states. \u201cSuch effects are stronger the larger the system,\u201d Carlesso said. With this approach, the distinction between what measures and what gets measured disappears. Everything plays by the same rules.<\/p>\n

A Quantum Beginning and a Classical Present<\/p>\n

The team focused on the universe\u2019s early moments, when space and time<\/a> itself might have existed in many states. Back then, the universe may have been in a superposition of different space-time shapes. But today, the cosmos looks classical. Space follows smooth, continuous laws. The researchers believe that the collapse model helps explain this shift.<\/p>\n

Carlesso\u2019s group applied their theory to a simplified version of the universe, known as the Friedmann-Lema\u00eetre-Robertson-Walker (FLRW)<\/a> model. This model assumes the universe is flat, even, and symmetric in every direction. It also aligns with what we observe in the Cosmic Microwave Background<\/a> (CMB), the faint radiation left over from the Big Bang.<\/p>\n

Schr\u00f6dinger’s well-known thought experiment imagines a cat trapped in a sealed box, its fate tied to a deadly trigger. (CREDIT: CC BY-SA 4.0) <\/p>\n

\u201cOur model describes a quantum universe that eventually collapses, becoming effectively classical,\u201d Carlesso explained. In this version, the universe doesn\u2019t need an observer. It naturally shifts from a quantum mess to a classical structure. This transformation would have happened before the release of the CMB, which already shows classical properties.<\/p>\n

Carlesso emphasized that the model doesn\u2019t suggest new behavior after the CMB. Instead, it helps us understand what came before. The theory lays the groundwork for explaining how space-time settled into a classical state from an early quantum fog<\/a>.<\/p>\n

Solving Schr\u00f6dinger\u2019s Paradox<\/p>\n

By introducing spontaneous collapse, the researchers bring a fresh solution to Schr\u00f6dinger\u2019s famous paradox. In traditional quantum mechanics, systems remain in multiple states until observed. In the revised model, every system\u2014big or small\u2014collapses on its own over time. There\u2019s no need for an outside measurement.<\/p>\n

Mean \u27e8\u03bb\u02c6\u27e9 t for 1000 different realizations of the noise field Wt, with \u03f5 = 0.05 and an initial state with Q(\u03bb) \u221d e\u2212(\u03bb\u2212\u03bb0)
\n2\/4\u03c320 with \u03bb0 = 10 and \u03c320 = 4. (CREDIT: Journal of High Energy Physics) <\/p>\n

\u201cAny system localizes spontaneously in a particular state,\u201d Carlesso said. \u201cInstead of having a cat being dead and alive, one finds it dead or alive.\u201d This same logic applies to the universe. Rather than being in a mix of different space-time geometries, the cosmos collapsed<\/a> into one classical form.<\/p>\n

This collapse process makes a clear prediction: larger systems collapse more often. Subatomic particles remain in superposition longer, but once they interact with larger systems, they quickly take on definite values. This could explain how classical properties emerge naturally, without needing to rewrite the laws of general relativity.<\/p>\n

Testing a Bold New Theory<\/p>\n

The idea of spontaneous collapse is elegant, but testing it is no easy task. The effects predicted by the model are incredibly small, especially in systems like atoms or molecules<\/a>. Detecting these changes requires experiments with extreme sensitivity.<\/p>\n

Carlesso and his team are now working with experimental physicists to test their ideas. These experiments aim to find small differences from regular quantum behavior. If the model is right, even tiny deviations could confirm it. If wrong, they\u2019ll help set limits on how much quantum theory can be altered.<\/p>\n

Comparison of the solutions \u27e8\u03bb\u02c6\u27e9t as expressed respectively in eq. (A.14a) and eq. (A.15a). (CREDIT: Journal of High Energy Physics) <\/p>\n

\u201cTogether with experimental collaborators, we are trying to test the effects of the collapse modifications or derive bounds on their parameters,\u201d Carlesso said. \u201cThis is completely equivalent to testing the limits of quantum theory.\u201d<\/p>\n

While the model doesn\u2019t predict new large-scale cosmic events, it gives scientists a powerful way to think about the universe\u2019s early behavior. It may not answer all questions, but it provides a meaningful step toward joining the world of quantum theory<\/a> with the classical one we observe.<\/p>\n

As theories go, this one offers both a fix for a deep mystery and a path forward for future discoveries. If confirmed, it could finally explain how the classical world rises from quantum origins\u2014and why, despite the strange rules of particles, cats remain either alive or dead, never both.<\/p>\n

More about the Schr\u00f6dinger Equation<\/p>\n

The Schr\u00f6dinger equation is a fundamental equation in quantum mechanics that describes how the quantum state of a physical system changes over time. It essentially provides a way to predict the behavior of particles at the atomic and subatomic level<\/a>. It’s analogous to Newton’s laws of motion in classical mechanics, but for the quantum world.<\/p>\n

Schr\u00f6dinger’s equation is analogous to Newton’s laws of motion in classical mechanics, but for the quantum world. (CREDIT: CC BY-SA 4.0) What the equation describes:<\/p>\n

Wavefunction: The Schr\u00f6dinger equation uses a function called the wavefunction (usually denoted by the Greek letter \u03c8) to represent the quantum state of a system. This function contains all the information about the system, including its energy, momentum, and position.<\/p>\n

Evolution of the system: The equation predicts how the wavefunction evolves (changes) over time, giving us insight into how the quantum system will behave.<\/p>\n

Probabilistic nature: While the Schr\u00f6dinger equation provides a deterministic way to describe the evolution of the wavefunction, the actual outcome of a measurement on a quantum system is probabilistic. The wavefunction<\/a> squared gives the probability density of finding a particle in a particular location at a specific time.<\/p>\n

Key components of the equation:Hamiltonian operator (H): Represents the total energy of the system (kinetic energy + potential energy).Time-dependent term: The term \u2202\/\u2202t (partial derivative with respect to time), which indicates how the wavefunction changes with time.Wavefunction (\u03c8): The function that describes the quantum state of the system.Time-dependent vs. time-independent:Time-dependent Schr\u00f6dinger equation: The general form that describes how the wavefunction evolves over time.Time-independent Schr\u00f6dinger equation: A simplified version that applies when the potential energy<\/a> of the system doesn’t change with time. It’s used to find the allowed energy levels (eigenvalues) of a quantum system.Classical mechanics can predict where the ball will be at any given time. (CREDIT: CC BY-SA 4.0) In simpler terms:<\/p>\n

Imagine throwing a ball. Classical mechanics can predict where the ball will be at any given time. The Schr\u00f6dinger equation does a similar thing for quantum particles, but instead of predicting the exact position and momentum, it predicts the probability of finding the particle in a certain state.<\/p>\n

Why it’s important:<\/p>\n

The Schr\u00f6dinger equation is a cornerstone of quantum mechanics<\/a> and has been incredibly successful in explaining and predicting the behavior of matter at the atomic and subatomic levels. It’s used to understand the structure of atoms, the behavior of molecules, and the properties of materials.<\/p>\n","protected":false},"excerpt":{"rendered":"In the strange world of quantum mechanics, objects can exist in several states at once. This concept, called…\n","protected":false},"author":2,"featured_media":551,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[49],"tags":[199,79],"class_list":{"0":"post-550","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-physics","8":"tag-physics","9":"tag-science"},"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/posts\/550","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/comments?post=550"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/posts\/550\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/media\/551"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/media?parent=550"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/categories?post=550"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/tags?post=550"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}