• Medicine
  • Spirituality
  • Astronomy
  • Sociology
  • Technology
  • History
  • Open Access
  • News

Gravity Wave Analogue Black Hole Spin Precession – A New Study Finds

Spin Precession - If the orbit of a stationary gyroscope gets smaller, the spin precession frequency would show weird things in the strong gravity area, and then it would become arbitrarily high very close to the horizon of a rotating black hole. In the laboratory, the predicted substantial gravity influence on spin precession can be observed by considering the gravity waves of a flowing fluid with vortex in a shallow basin that behaves as a revolving analogue black hole. By threading the buoyant particles onto a thread and anchoring it to the bottom of the fluid container with a short length of small chain, a simple local test gyroscope can be built to monitor the spin precession frequency in the area of the gravity wave analogue black hole. The thread serves as the gyroscope's axis. As a specific situation, by adjusting the orbital frequency of the test gyroscope, the strong gravity Lense-Thirring effect and geodetic/de-Sitter effect can be measured with this experimental setup. To measure the Lense-Thirring effect, for example, the length of the tiny chain can be set to zero, causing the gyroscope to become static. With this setup, one may also detect geodetic precession by orbiting the test gyroscope in the so-called Keplerian frequency around the non-rotating analogue black hole, which can be built by making the rotation of the fluid/vortex minimal in comparison to its radial velocity.

Chandrachur Chakraborty of the Indian Institute of Science in India calculated the exact spin precession frequency and proposed a practical experimental setup for measuring it. The goal of this study was to see how gravity affects spin precession in the lab by making rotating black holes in the Kerr spacetime.

Gravity Wave Analogue

The exact spin precession frequency of an accelerated test spin/gyroscope in analogue (non-) spinning BH spacetime was calculated by the researcher. In a specific scenario, the spin precession frequency of a non-accelerated test gyroscope moving along a so-called geodesic could be measured. Surprisingly, the researcher was able to build a competent test gyroscope in a fairly easy manner, allowing to detect these various spin precession frequencies in the laboratory using a convenient experimental setup. It was also demonstrated that the spin precession frequency curves follow the same qualitative pattern as they do in the vicinity of a real Kerr black hole. As a result, measuring the spin precession effect in the lab with gravity wave analogue black holes is a good way to show how important spin precession is to gravity in both Schwarzschild and Kerr black holes.

Black Holes

The advantage of the gravity wave analogue black hole is that it can be easily simulated in the laboratory. The key advantage is the ability to tune the velocity of gravity wave propagation separately and measure its amplitude directly with high precision by adjusting merely the background fluid's height. The same cannot be said for the sound waves in the draining bathtub of spacetime. In our laboratory, we should be able to alter the orbital frequency of the test gyroscope in order to properly simulate the original spin precession effect of the strong gravity regime in our laboratory. In the instance of the draining bathtub spacetime, defining and/or building a proper test gyroscope to detect the spin precession effect in the laboratory is extremely challenging. In contrast, we may build a simple test gyroscope out of buoyant particles and establish the correct axis to observe spin precession. It should be noted that fluid acceleration can occur if the height h varies. This also causes the test gyroscope to automatically accelerate.


It is important to highlight that the entire formulation of this study is based on inviscid fluid. The Lorentz violation is caused by the fluid's non-zero viscosity, thus the equivalent black hole metric may not be extractable in a closed form in this situation. Despite the viscosity issue, the first experimental discovery of the "superradiance" phenomenon was possible using water. However, no such studies in the laboratory have yet been undertaken to identify the strong gravitational effect of spin precession. The consequences of spin precession could also be studied using alternative analogue models of black holes based on boson gas and/or neural networks. For example, when an acoustic black hole is made with a Bose-Einstein condensed system, a Bose-Einstein condensed gyroscope can be used to see the gravity caused by spin precession.

About The Authors

Suleman Shah

Suleman Shah - Suleman Shah is a researcher and freelance writer. As a researcher, he has worked with MNS University of Agriculture, Multan (Pakistan) and Texas A & M University (USA). He regularly writes science articles and blogs for science news website immersse.com and open access publishers OA Publishing London and Scientific Times. He loves to keep himself updated on scientific developments and convert these developments into everyday language to update the readers about the developments in the scientific era. His primary research focus is Plant sciences, and he contributed to this field by publishing his research in scientific journals and presenting his work at many Conferences. Shah graduated from the University of Agriculture Faisalabad (Pakistan) and started his professional carrier with Jaffer Agro Services and later with the Agriculture Department of the Government of Pakistan. His research interest compelled and attracted him to proceed with his carrier in Plant sciences research. So, he started his Ph.D. in Soil Science at MNS University of Agriculture Multan (Pakistan). Later, he started working as a visiting scholar with Texas A&M University (USA). Shah’s experience with big Open Excess publishers like Springers, Frontiers, MDPI, etc., testified to his belief in Open Access as a barrier-removing mechanism between researchers and the readers of their research. Shah believes that Open Access is revolutionizing the publication process and benefitting research in all fields.

Recent Articles

  • Stone Age Humans Conducted Surgical Amputation, A New Study Finds Evidence

    Stone Age Humans Conducted Surgical Amputation, A New Study Finds Evidence

    Scientific investigation in Borneo has unearthed the world's first documented instance that stone age humans conducted surgical amputation. This discovery represents a significant achievement in the annals of human prehistory.

  • 180 Tips - Best Website For Football Prediction And Tips

    180 Tips - Best Website For Football Prediction And Tips

    How can you beat the best odds at the most well-known online bookmakers when betting on soccer matches? Today's 180 Tips forecasts from Betwinner360 include a record of winning methods. 180 tips provides in-depth research of more than 50 different football leagues, betting tactics organized by market, and expert predictions for each match.

  • Virgo And Sagittarius Compatibility - Great Conversations

    Virgo And Sagittarius Compatibility - Great Conversations

    Virgo and Sagittarius's compatibility is such that they are attracted to one another right away. They base their first interactions on how well they get along in conversation, which comes naturally to them both. These changeable signs will enjoy every minute of talking to each other to death! They engage in frenzied arguments, lengthy philosophical discussions, and fast banter.

  • Pisces And Aquarius Compatibility - Creative Brilliance

    Pisces And Aquarius Compatibility - Creative Brilliance

    Pisces and Aquarius compatibility is such that these two are masters of manifestation while working together. When Aquarians let go of their rigid views, they become natural alchemists who are capable of creating with their creative brilliance. Because of their more flexible and understanding nature, Pisces may assist them in becoming less stuck and releasing their boundless creative potential.

  • Pisces And Scorpio Compatibility - Best Match For Love

    Pisces And Scorpio Compatibility - Best Match For Love

    Pisces and Scorpio compatibility is that they have an innate knowledge of one another, even though they are frequently mysterious to others. These two are irresistibly attracted to each other because they feel like they understand each other but don't say it out loud. They seem to have a psychic connection because they can easily tune into one another's brains.

  • A Massive 7.6 Earthquake Rocks Papua New Guinea

    A Massive 7.6 Earthquake Rocks Papua New Guinea

    On Sunday, a massive 7.6 earthquake rocks Papua New Guinea, causing landslides, cracking roads, and damaging houses. It is currently unknown how extensive the damage is; however, there is debris scattered over the highways and fissures popping up in the roads. According to the United States Geological Survey, the epicenter of the earthquake was located at a depth of 90 kilometers, or around 56 miles, and was close to the town of Kainantu, which has a population of approximately 8,500 people.

  • Most Frequent Angel Numbers You Keep Seeing Is Luck Or Unlucky

    Most Frequent Angel Numbers You Keep Seeing Is Luck Or Unlucky

    The most frequent angel numbers you keep seeing are distinct from other forms of esoterica in that they have no connection to the date that you were born. In numerology, every number has a meaning. Nevertheless, certain number sequences are more prevalent than others. Because all of us have come across them, three-digit angel numbers are widespread.

  • Pisces And Leo Compatibility Is Quite Strong

    Pisces And Leo Compatibility Is Quite Strong

    Leo will inevitably rule Pisces in some aspect of life, Pisces and Leo compatibility whether it is in terms of work, friendship, or love. However, as Leos are kind and loving rulers who have no malice in their hearts, and since the fish don't mind being ruled if it's done with warmth and love, this isn't always a terrible thing.

  • Angel Number 6666 Meaning - A Sign That Your Heart Is Full Of Love

    Angel Number 6666 Meaning - A Sign That Your Heart Is Full Of Love

    If you keep seeing the same number in your life, it's not a coincidence. The angels use Angel Number 6666 meaning to send you an important message. If you can clearly interpret the message of angel number 6666, it will serve you well. This number appears in your life directly from the divine realm.