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American Focus > Blog > Tech and Science > Laws of quantum physics may rule out a universe that came before ours
Tech and Science

Laws of quantum physics may rule out a universe that came before ours

Last updated: July 19, 2025 11:40 am
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Laws of quantum physics may rule out a universe that came before ours
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The concept of a cyclic universe, where our cosmos expands and contracts in a never-ending cycle, has long fascinated scientists and theorists. Could our universe have originated from a big bounce, where another universe collapsed into a dense point before expanding into what we know today? While this idea may seem intriguing, a recent mathematical analysis suggests that the laws of physics may not allow for such a scenario.

At the heart of a cyclic universe is the idea of a big bounce, an alternative to the traditional big bang theory. Instead of starting from a singularity, where matter and energy are infinitely dense, the universe would contract to a dense point before expanding once again. This cyclic model raises questions about the nature of time and the fate of our cosmos.

In 1965, Roger Penrose demonstrated that general relativity, our best theory of gravity, breaks down in the presence of extreme conditions such as those found in black holes. This breakdown leads to singularities, points where the laws of physics cease to apply. Building on Penrose’s work, Raphael Bousso from the University of California, Berkeley, has incorporated quantum theory into his analysis to further explore the implications of a cyclic universe.

Bousso’s analysis, which considers the quantum nature of the universe, challenges the idea of a cyclic universe. Unlike previous studies that focused on weak gravity, Bousso’s work does not limit the strength of gravity and concludes that cyclic universes are not feasible. This finding reinforces the inevitability of a singularity at the beginning of our universe.

The implications of Bousso’s work have sparked discussions among physicists. Onkar Parrikar from the Tata Institute of Fundamental Research praises the generalization of Penrose’s theorem, while Chris Akers from the University of Colorado Boulder acknowledges the significance of incorporating quantum physics into the analysis. However, there is skepticism surrounding Bousso’s reliance on the generalised second law of thermodynamics, as its definitive proof is still pending.

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Despite the challenges to the cyclic universe hypothesis, researchers like Surjeet Rajendran from Johns Hopkins University continue to explore alternative scenarios. Mathematical models of bouncing universes offer new perspectives on cosmic history, but the search for concrete evidence remains ongoing. Observations of gravitational waves could provide clues to a cosmic bounce, but current detectors may not be sensitive enough to detect the necessary frequencies.

As scientists continue to unravel the mysteries of the universe, the debate over the origins and fate of our cosmos will persist. The quest for a unified theory that combines general relativity and quantum mechanics remains a fundamental pursuit in understanding the nature of our reality. While the concept of a cyclic universe may face challenges, the exploration of alternative scenarios pushes the boundaries of our knowledge and challenges us to rethink our understanding of the cosmos. The world of technology is constantly evolving, with new advancements being made every day. One of the most exciting areas of technological innovation is artificial intelligence (AI). AI is a branch of computer science that focuses on creating intelligent machines that can perform tasks that typically require human intelligence, such as visual perception, speech recognition, decision-making, and language translation.

One of the key areas where AI is making a significant impact is in healthcare. AI has the potential to revolutionize the healthcare industry by improving patient outcomes, reducing costs, and increasing efficiency. AI-powered tools can analyze vast amounts of data to help doctors diagnose diseases more accurately and quickly, predict patient outcomes, and personalize treatment plans based on individual patient data.

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For example, AI algorithms can analyze medical images such as X-rays, MRIs, and CT scans to detect abnormalities and diagnose diseases like cancer at an early stage when they are more treatable. This can help doctors make more informed decisions and provide better care to their patients. AI can also be used to monitor patients remotely, provide real-time insights into their health status, and alert healthcare providers to potential issues before they escalate.

In addition to improving patient care, AI can also help healthcare organizations streamline their operations and reduce costs. AI-powered tools can automate administrative tasks, such as scheduling appointments, processing paperwork, and billing insurance companies, freeing up healthcare professionals to focus on patient care. AI can also help hospitals and clinics optimize their resources, such as hospital beds, operating rooms, and medical supplies, to ensure that they are being used efficiently.

However, while the potential benefits of AI in healthcare are significant, there are also challenges and concerns that need to be addressed. One of the biggest concerns is the ethical implications of using AI in healthcare, such as data privacy, security, and bias in algorithms. Healthcare organizations need to ensure that patient data is stored securely, and that AI algorithms are developed and implemented in a way that is fair and transparent.

Overall, AI has the potential to transform the healthcare industry by improving patient care, reducing costs, and increasing efficiency. While there are challenges that need to be addressed, the benefits of integrating AI into healthcare are undeniable. As technology continues to advance, AI will play an increasingly important role in shaping the future of healthcare and improving the lives of patients around the world.

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