The STEAM Blog

Kinal Patel
Edited by Saaketh Suvarna

Every year, scientists around the world publish over 500 research papers exploring the mysteries of time travel. But how close are we to turning this dream into a reality? Throughout history,  renowned scientists like Albert Einstein and Stephen Hawking have inquired about the possibilities of time travel and its underlying science. Despite these efforts,  time remains an unknown force.

1. Introduction

Quantum physics is best defined as the study of matter and energy, aiming to uncover space and time’s very properties and behaviors. Founded by Niels Bhor and Max Planck, quantum physics has undergone many revelations and theories and is still a growing and constantly changing concept that humans still can’t comprehensively understand. It is founded on several key principles that challenge our classical understanding of the universe, including wave-particle duality, quantization, and the Heisenberg Uncertainty Principle.

2. Understanding the Foundations of Quantum Mechanics

In quantum physics, we explore fascinating ideas that change how we see the world. One key concept is wave-particle duality, which means that tiny particles like electrons and light can act like waves and particles simultaneously. This was famously discovered by Max Planck and Albert Einstein. Planck introduced the idea of quantization, where energy comes in specific packets called “quanta,” represented by the equation E = hf. This basically means that the higher frequency a photon is, the more energy it has. High energy photons (described by E = hf)  might be used to create or manipulate space-time conditions, like wormholes, which are theorized to allow time travel.  Another important idea is Heisenberg’s Uncertainty Principle, proposed by Warner Heisenberg, which says that we can’t precisely measure certain properties like position (x) and momentum (p) at the same time, shown as Δx ⋅ Δp ≥ h/2. These concepts help us understand the behavior of particles at the smallest scales and the foundation of time travel.

3. Wormholes and Spacetime

Wormholes are hypothetical passages through space proposed by physicists as potential shortcuts between distant points in the universe. This concept suggests that if transversal wormholes exist, they could allow for travel not only through space but also through time as well. According to the theory of general relativity, which describes the interactions between matter and the curvature of spacetime, wormholes could theoretically connect two separate regions of space-time and create a tunnel-like structure that is passable. This opens up the discussion of the possibility of time travel. In theory, if we could travel through a wormhole, we might be able to journey not just through space but also through time. This idea suggests that entering one end of a wormhole could potentially transport us to a different time, such as in the past or the future.

4. Time Dilation and Relativity

Serving as an important foundation for Einstein’s theory of relativity, time dilation explicates how time unfolds differently for humans in different situations. According to special relativity, when objects move at high speeds, time appears to slow down for them compared to those who are not moving as quickly.. For example, if you’re on a fast moving train and your friend is standing still, time seems to move slower for you than for your friend. So, even though your watches start together, when you meet again, they won’t show the same time when you meet again because you were moving fast. Consequently, clocks aboard fast-moving objects, like spacecraft, tick and move more slowly than still-standing individuals. Consequently, clocks in space or fast moving objects tick more slowly than those on Earth.In regions of intense gravity, such as near massive celestial bodies, clocks run slower compared to those in weaker gravitational fields, as shown by the satellites that orbit around Earth. Scientists use time dilation to accurately input and code technologies like GPS. Time dilation and relativity show the relationship between gravity, motion, and the perception of time.

5. Quantum Entanglement

Quantum Entanglement is the phenomenon where two or more particles become correlated in such a way that the state of one particle is dependent on the state of another, regardless of the distance between them. This means that if we measure a property of one entangled particle, such as its spin or polarization, the state of its entangled partner becomes instantaneously correlated, even if they are light-years apart. Imagine you have two particles, let’s call them A and B, that are linked specially, almost like they’re communicating with each other. When something happens to particle A, like changing its spin, particle B immediately knows and changes too, no matter how far apart they are. This connection is called quantum entanglement. It’s as if they’re dancing to the same tune, even if they’re on opposite sides of the universe. While we don’t fully understand the mechanism behind quantum entanglement, it holds immense potential for technologies like quantum computing, cryptography, and long-distance communication. It could also help with time travel, allowing for instantaneous communication over large distances of time and space.

Conclusion

It may be hundreds or even thousands of years until humanity can finally achieve time travel, but until then, we can continue to expand our knowledge of quantum physics. While theories like wormholes, quantum entanglement, time dilation, and relativity can possibly insinuate time travel, the reality still remains uncertain. Despite the challenges, exploring the quantum physics of time travel can strengthen our understanding of the universe as a whole. 

References

• Aaserud, Finn. “Niels Bohr”. Encyclopedia Britannica, 29 Apr. 2024, https://www.britannica.com/biography/Niels-Bohr. 
• Britannica, The Editors of Encyclopaedia. “uncertainty principle”. Encyclopedia Britannica, 29 Mar. 2024, https://www.britannica.com/science/uncertainty-principle.
• “Quantum Time Travel: The Experiment to “Send a Particle into the Past.”” New Scientist, www.newscientist.com/article/mg26234932-900-quantum-time-travel-the-experiment-to-send-a-particle-into-the-past/.
• American Museum of Natural History. “Einstein: Time Is Relative (to Your Frame of Reference) | AMNH.” American Museum of Natural History, 2020, www.amnh.org/exhibitions/einstein/time/a-matter-of-time#:~:text=In%20the%20Special%20Theory%20of.
• —. “Quantum Theory: The Einstein/Bohr Debate of 1927 | AMNH.” American Museum of Natural History, www.amnh.org/exhibitions/einstein/legacy/quantum-theory#:~:text=Einstein%20saw%20Quantum%20Theory%20as.
• Caltech. “What Is Quantum Physics?” Caltech Science Exchange, 2024, scienceexchange.caltech.edu/topics/quantum-science-explained/quantum-physics.
• e-Guide. “Understanding Time Travel and Quantum Physics for Anyone: A Guide to Enjoying Sci-Fi Movies and Shows.” Medium, Medium, 16 Feb. 2023, e-guide.medium.com/understanding-time-travel-and-quantum-physics-for-anyone-a-guide-to-enjoying-sci-fi-movies-and-65c4881b656c.
• Howell, Elizabeth. “Time Travel: Theories, Paradoxes & Possibilities.” Space.com, Space.com, 14 Nov. 2017, www.space.com/21675-time-travel.html.
• https://www.howstuffworks.com, and https://www.howstuffworks.com/robert-lamb-author.htm. “How Time Travel Works.” HowStuffWorks, 20 Oct. 2000, science.howstuffworks.com/science-vs-myth/everyday-myths/time-travel.html.
• “Planck’s Quantum Theory| Black Body Radiation|Planck’s Constant|Byju’s.” BYJUS, byjus.com/chemistry/planks-quantum-theory/#:~:text=According%20to%20Planck.
• “Simulations of “Backwards Time Travel” Can Improve Scientific Experiments.” University of Cambridge, 12 Oct. 2023, www.cam.ac.uk/research/news/simulations-of-backwards-time-travel-can-improve-scientific-experiments.
• “Wormhole – Einstein Rosen Bridge, Time Travel, General Relativity, FAQs.” BYJUS, byjus.com/physics/wormhole/.