image:Professor Sren Fournais of the University of Copenhagen view more
Credit: Jim Hyer/University of Copenhagen
"Imagine one of those spectacular opening ceremonies at the Olympics, where a huge crowd suddenly gathers as a unit and synchronizes its movements like a flock of starlings. In a few very special and strange cases, the same occurs in the world of atoms. In them, a million atoms that have all entered the same quantum state behave completely synchronously," explains University of Copenhagen math professor Sren Fournais.
Fournais is referring to the mysterious quantum phenomenon known as Bose-Einstein condensates. These can occur if certain kinds of atoms are successfully cooled to temperatures near absolute zero. Here, anywhere from 100,000 to several million atoms entangle, with all of them transitioning into the same quantum state at the same moment a point at which the substance is neither solid, liquid, gas nor plasma. It is often described as being in its own fifth state.
While Bose and Einstein predicted the existence of such a phenomenon in the 1920s, it wasnt until 1995 that a Bose-Einstein condensate was produced in the lab a Nobel Prize winning achievement. And even though researchers worldwide are busy exploring the new quantum state, much remains a mystery.
"Our general understanding of these extreme physical systems is incomplete. We lack the mathematical tools to analyse and understand condensates and thereby the ability to possibly put them to good use. The mathematical challenge is that you have a tremendous number of particles interacting with each other, and that the correlations between these particles are crucial for their behavior. The equations were written down a long time ago, but one cannot just solve them. In the years ahead, well focus on understanding these solutions," says University of Copenhagen mathematics professor Sren Fournais.
Fournais is one of the world's leading researchers in quantum mechanical equations and has already spent ten years of his career wrestling with the wondrous nature of Bose-Einstein condensates. He is now dedicating the next five years to getting closer to the phenomenons complex mathematical solutions. To do so, the European Research Council has awarded him DKK 15 million through one of its highly prestigious ERC Advanced Grants.
Quantum mechanics takes place in the micro-world of atoms, within which the quantum effects are so minuscule that we do not experience them in our daily lives. The truly fascinating aspect of a Bose-Einstein condensate is that because it is made up of huge masses of atoms, it is nearly large enough to be observed with the naked eye. This makes it ideal for teaching us about quantum mechanics and for conducting experiments on a scale large enough to actually see them.
Researchers around the world are working to exploit the quantum properties of Bose-Einstein condensates in various ways. In 2022, Dutch scientists built an atomic laser based on a Bose-Einstein condensate. Danish professor Lene Hau of Harvard University has demonstrated that she can stop the light using a Bose-Einstein condensate. Work is also underway around the world to base a quantum computer on these icy atoms. However, there are still plenty of bumps in the road and the condensates are still only used at the basic research level.
According to Sren Fournais, the missing answers are found in the equations or at least the theoretical answers:
"The beautiful and fascinating thing about mathematical physics is that we can write down the laws of nature in relatively simple equations on a piece of paper. Those equations contain an incredible amount of information in fact, all the answers. But how can we extract the information that tells us what we want to know about these wild physical systems? It's a huge challenge, but it's possible," says Fournais.
As with the phase transition that occurs when water freezes into ice, Bose-Einstein condensation, in which atoms transition to a quantum state, is a phase transition. It is this physical transformation that Sren Fournais dreams of finding the mathematical solution to.
"My big dream is to mathematically prove the phase transition that the Bose-Einstein condensation is. But demonstrating phase transition is notorious for being extremely difficult, because you go from particles moving randomly about to them sticking. A symmetry is broken. It is very difficult to see why the particles do so and exactly when it will happen. Consequently, up until now, there is only one physical system where we have succeeded in saying something mathematical about this phase transition," says Fournais, who adds:
"I think that its unrealistic to solve this task in five years but hope that the project will get us closer than we are today. And then we have many intermediate objectives that we hope to achieve along the way."
Over the past 5-10 years, Professor Fournais has been behind some of the most significant global breakthroughs having to do with the mathematical understanding of Bose-Einstein condensates. Among other things, he proved the formula for the ground-state energy of a Bose-Einstein condensate a question that had remained unanswered since about 1960.
So, how does one of Europe's leading mathematicians approach such a task? According to Sren Fournais, it doesnt happen in front of a computer:
"A computer can make a numerical calculation for 10 or 20 particles, but not a million. So, the computer is not a useful tool for us. Instead, it's a matter of a lot of coffee, good ideas and hard work at the blackboard with chalk," says the researcher, who concludes:
"A typical week begins with a few good new ideas from the previous weekend that you are eager to pursue. And then you work Monday, Tuesday and Wednesday until it seems to be progressing. Except that on Thursday, you realize that it isnt. But you get wiser. And then, the next round of ideas for the following week is perhaps a bit more tested. And then at some point, everything falls into place."
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Excerpt from:
- The application of three-axis low energy spectroscopy in quantum physics research - Phys.Org - May 3rd, 2017 [May 3rd, 2017]
- Physicists breed Schrdinger's cats to find boundaries of the | Cosmos - Cosmos - May 3rd, 2017 [May 3rd, 2017]
- Scientists 'BREED' Schrodinger's Cat in massive quantum physics breakthrough - Express.co.uk - May 3rd, 2017 [May 3rd, 2017]
- Quantum Physics: Are Entangled Particles Connected Via An Undetected Dimension? - Forbes - May 3rd, 2017 [May 3rd, 2017]
- Quantum physics is oppressive - Patheos - Patheos (blog) - June 6th, 2017 [June 6th, 2017]
- It's widely abused as a buzzword. But can quantum mechanics explain how we think? - National Post - June 6th, 2017 [June 6th, 2017]
- Quantum Physics and Love are Super Weird and Confusing, but This Play Makes Sense of Them Both - LA Magazine - June 6th, 2017 [June 6th, 2017]
- One step closer to the quantum internet by distillation - Phys.Org - June 7th, 2017 [June 7th, 2017]
- UW Grad Student from Star Valley Earns Quantum Mechanics Fellowship - SweetwaterNOW.com - June 10th, 2017 [June 10th, 2017]
- Solving systems of linear equations with quantum mechanics - Phys.Org - June 10th, 2017 [June 10th, 2017]
- Quantum Computing Might Be Here Sooner Than You Think ... - Bloomberg - June 14th, 2017 [June 14th, 2017]
- Quantum Physics News - Phys.org - News and Articles on ... - June 14th, 2017 [June 14th, 2017]
- Chinese satellite breaks a quantum physics record, beams entangled photons from space to Earth - Los Angeles Times - June 16th, 2017 [June 16th, 2017]
- Popular Quantum Physics Books - Goodreads - June 16th, 2017 [June 16th, 2017]
- Cybersecurity Attacks Are a Global Threat. Chinese Scientists Have the Answer: Quantum Mechanics - Newsweek - June 17th, 2017 [June 17th, 2017]
- A quantum step to a great wall for encryption - The Hindu - June 18th, 2017 [June 18th, 2017]
- What Is Quantum Mechanics? - livescience.com - June 18th, 2017 [June 18th, 2017]
- Physicists Demonstrate Record Breaking Long-Distance Quantum Entanglement in Space - Futurism - June 20th, 2017 [June 20th, 2017]
- Viewpoint: A Roadmap for a Scalable Topological Quantum Computer - Physics - June 21st, 2017 [June 21st, 2017]
- How Schrdinger's Cat Helps Explain the New Findings About the Quantum Zeno Effect - Futurism - June 21st, 2017 [June 21st, 2017]
- BMW and Volkswagen Try to Beat Apple and Google at Their Own Game - New York Times - June 22nd, 2017 [June 22nd, 2017]
- How quantum physics could revolutionize casinos and betting if you can understand it - Casinopedia - June 22nd, 2017 [June 22nd, 2017]
- Quantum thermometer or optical refrigerator? - Phys.Org - June 22nd, 2017 [June 22nd, 2017]
- Physicists settle debate over how exotic quantum particles form - Phys.Org - June 23rd, 2017 [June 23rd, 2017]
- In 1928, One Physicist Accidentally Predicted Antimatter - Popular Mechanics - June 23rd, 2017 [June 23rd, 2017]
- Atomic imperfections move quantum communication network closer ... - Phys.Org - June 24th, 2017 [June 24th, 2017]
- DOE Launches Chicago Quantum Exchange - HPCwire (blog) - June 26th, 2017 [June 26th, 2017]
- Google to Achieve "Supremacy" in Quantum Computing by the End of 2017 - Big Think - June 26th, 2017 [June 26th, 2017]
- Physicists make quantum leap in understanding life's nanoscale ... - Phys.Org - June 27th, 2017 [June 27th, 2017]
- Berkeley Lab Intern Finds Her Way in Particle Physics - Lawrence Berkeley National Laboratory - June 27th, 2017 [June 27th, 2017]
- Payments Innovation - A Quantum World Of Payments - Finextra (blog) - June 30th, 2017 [June 30th, 2017]
- Why can't quantum theory and relativity get along? - Brantford Expositor - June 30th, 2017 [June 30th, 2017]
- How quantum trickery can scramble cause and effect - Nature.com - June 30th, 2017 [June 30th, 2017]
- Telecommunications, Meet Quantum Physics - Electronics360 - June 30th, 2017 [June 30th, 2017]
- Stephen Colbert Gets a Lesson on Quantum Physics from Brian ... - Patheos (blog) - July 2nd, 2017 [July 2nd, 2017]
- Quantum physics for babies a different bedtime story - CBC.ca - August 24th, 2017 [August 24th, 2017]
- How quantum mechanics can change computing - San Francisco ... - San Francisco Chronicle - August 24th, 2017 [August 24th, 2017]
- Physicists Use Lasers to Set Up First Underwater Quantum Communications Link - Gizmodo - August 24th, 2017 [August 24th, 2017]
- Notable Quotes on Quantum Physics Quantum Enigma - February 15th, 2018 [February 15th, 2018]
- Nothing Is Solid & Everything Is Energy Scientists Explain The World ... - April 11th, 2018 [April 11th, 2018]
- The World Of Quantum Physics: EVERYTHING Is Energy - In5D ... - April 22nd, 2018 [April 22nd, 2018]
- Nothing Is Solid & Everything Is Energy Scientists ... - May 1st, 2018 [May 1st, 2018]
- Black Holes Bolster Case For Quantum Physics' Spooky Action ... - August 29th, 2018 [August 29th, 2018]
- Physics4Kids.com: Modern Physics: Quantum Mechanics - September 29th, 2018 [September 29th, 2018]
- Quantum Theory - Full Documentary HD - November 6th, 2018 [November 6th, 2018]
- Quantum mind - Wikipedia - February 6th, 2019 [February 6th, 2019]
- What is quantum theory? - Definition from WhatIs.com - May 5th, 2019 [May 5th, 2019]
- The Ultimate Mystery? Consciousness May Exist in the Absence of Matter (Weekend Feature) - The Daily Galaxy --Great Discoveries Channel - September 19th, 2019 [September 19th, 2019]
- Faculty Opening, Quantum Information and Condensed Matter Experiment - Physics - September 19th, 2019 [September 19th, 2019]
- Become the physicists the world needs with the help of a physics degree - Study International News - September 19th, 2019 [September 19th, 2019]
- Imec and NUS working on chip-based quantum cryptography - Optics.org - September 19th, 2019 [September 19th, 2019]
- Strong LightMatter Coupling in Molecular and Material Engineering - Advanced Science News - September 19th, 2019 [September 19th, 2019]
- The key to bigger quantum computers could be to build them like Legos - MIT Technology Review - September 19th, 2019 [September 19th, 2019]
- Australian universities are accused of trading free speech for cash - The Economist - September 19th, 2019 [September 19th, 2019]
- APS Physics Career Center - Physics - September 19th, 2019 [September 19th, 2019]
- Assistant Professor of Physics, Employment - Physics - September 19th, 2019 [September 19th, 2019]
- A new approach to quantum gravity - Tech Explorist - September 19th, 2019 [September 19th, 2019]
- A Huge Experiment Has 'Weighed' the Tiny Neutrino, a Particle That Passes Right Through Matter - Gizmodo - September 19th, 2019 [September 19th, 2019]
- Many Worlds, But Too Much Metaphor - Forbes - September 19th, 2019 [September 19th, 2019]
- Iran to open 1st quantum physics lab in a year: AEOI head - Mehr News Agency - English Version - September 19th, 2019 [September 19th, 2019]
- Quantum Computing Breakthrough: New Detection Tool Uncovers Noise That Can Kill Qubits - SciTechDaily - September 19th, 2019 [September 19th, 2019]
- A quantum computing startup that spun out of a Harvard lab just came out of stealth mode with $2.7 million in seed funding from investors like Samsung... - September 19th, 2019 [September 19th, 2019]
- Important Quantum Algorithm May Be a Property of Nature - Technology Networks - September 19th, 2019 [September 19th, 2019]
- A New Perspective On Grover's Search Algorithm -- Quantum Physics & DNA - Analytics India Magazine - September 19th, 2019 [September 19th, 2019]
- Iran to open first quantum physics lab in a year: AEOI head - Quantaneo, the Quantum Computing Source - September 19th, 2019 [September 19th, 2019]
- Sean Carroll: Universe a 'tiny sliver' of all there is - PBS NewsHour - September 19th, 2019 [September 19th, 2019]
- IBM cuts ribbon on quantum computing centre wherein a 53-qubit monster lurks - The Register - September 19th, 2019 [September 19th, 2019]
- In 'Something Deeply Hidden,' Sean Carroll Argues There Are Infinite Copies Of You - NPR - September 19th, 2019 [September 19th, 2019]
- Physicists race to develop room-temperature quantum chips - The Next Web - September 19th, 2019 [September 19th, 2019]
- This One Experiment Reveals More About Reality Than Any Quantum Interpretation Ever Will - Forbes - September 19th, 2019 [September 19th, 2019]
- Our world is in need of the Mahatmas teachings: Dalai Lama - Livemint - October 2nd, 2019 [October 2nd, 2019]
- Quantum-inspired Beckman Institute celebration will be anything but small - Central Illinois Buzz - October 2nd, 2019 [October 2nd, 2019]
- Is It a Wave or a Particle? It's Both, Sort Of. - Space.com - October 2nd, 2019 [October 2nd, 2019]
- Princeton announces initiative to propel innovations in quantum science and technology - Quantaneo, the Quantum Computing Source - October 2nd, 2019 [October 2nd, 2019]
- Precision physics with 'tabletop' experiments - Stanford University News - October 2nd, 2019 [October 2nd, 2019]
- Andrea Young uncovers the strange physics of 2-D materials - Science News - October 2nd, 2019 [October 2nd, 2019]
- A Scientific Explainer of What Terrence Howard Was Talking About at the Emmys - VICE - October 2nd, 2019 [October 2nd, 2019]
- China's Silicon Valley aims to become the country's top research center - Abacus - October 16th, 2019 [October 16th, 2019]
- New Quantum-Mechanical Dissipation Mechanism Observed for the First Time - SciTechDaily - October 16th, 2019 [October 16th, 2019]
- Physicists have found quasiparticles that mimic hypothetical dark matter axions - Science News - October 16th, 2019 [October 16th, 2019]