Richard Feynman once said, If you think you understand quantum mechanics, then you dont understand quantum mechanics. While that may be true, it certainly doesnt mean we cant try. After all, where would we be without our innate curiosity?
To understand the power of the unknown, were going to untangle the key concepts behind quantum physics two of them, to be exact (phew!). Its all rather abstract, really, but thats good news for us, because you dont need to be a Nobel-winning theoretical physicist to understand whats going on. And whats going on? Well, lets find out.
Well start with a brief thought experiment. Austrian physicist Erwin Schrdinger wants you to imagine a cat in a sealed box. So far, so good. Now imagine a vial containing a deadly substance is placed inside the box. What happened to the cat? We cannot know to a certainty. Thus, until the situation is observed, i.e. we open the box, the cat is both dead and alive, or in more scientific terms, it is in a superposition of states. This famous thought experiment is known as the Schrdingers cat paradox, and it perfectly explains one of the two main phenomena of quantum mechanics.
Superposition dictates that, much like our beloved cat, a particle exists in all possible states up until the moment it is measured. Observing the particle immediately destroys its quantum properties, and voil, it is once again governed by the rules of classical mechanics.
Now, things are about to get more tricky, but dont be deterred even Einstein was thrown-back by the idea. Described by the man himself as spooky action at a distance, entanglement is a connection between a pair of particles a physical interaction that results in their shared state (or lack thereof, if we go by superposition).
Entanglement dictates that a change in the state of one entangled particle triggers an immediate, predictable response from the remaining particle. To put things into perspective, lets throw two entangled coins into the air. Subsequently, lets observe the result. Did the first coin land on heads? Then the measurement of the remaining coin must be tales. In other words, when observed, entangled particles counter each others measurements. No need to be afraid, though entanglement is not that common. Not yet, that is.
Whats the point of all this knowledge if I cant use it?, you may be asking. Whatever your question, chances are a quantum computer has the answer. In a digital computer, the system requires bits to increase its processing power. Thus, in order to double the processing power, you would simply double the amount of bits this is not at all similar in quantum computers.
A quantum computer uses qubits, the basic unit of quantum information, to provide processing capabilities unmatched even by the worlds most powerful supercomputers. How? Superposed qubits can simultaneously tackle a number of potential outcomes (or states, to be more consistent with our previous segments). In comparison, a digital computer can only crunch through one calculation at a time. Furthermore, through entanglement, we are able to exponentially amplify the power of a quantum computer, particularly when comparing this to the efficiency of traditional bits in a digital machine. To visualise the scale, consider the sheer amount of processing power each qubit provides, and now double it.
But theres a catch even the slightest vibrations and temperature changes, referred to by scientists as noise, can cause quantum properties to decay and eventually, disappear altogether. While you cant observe this in real time, what you will experience is a computational error. The decay of quantum properties is known as decoherence, and it is one of the biggest setbacks when it comes to technology relying on quantum mechanics.
In an ideal scenario, a quantum processor is completely isolated from its surroundings. To do so, scientists use specialised fridges, known as cryogenic refrigerators. These cryogenic refrigerators are colder than interstellar space, and they enable our quantum processor to conduct electricity with virtually no resistance. This is known as a superconducting state, and it makes quantum computers extremely efficient. As a result, our quantum processor requires a fraction of the energy a digital processor would use, generating exponentially more power and substantially less heat in the process. In an ideal scenario, that is.
Weather forecasting, financial and molecular modelling, particle physics the application possibilities for quantum computation are both enormous and prosperous.
Still, one of the most tantalising prospects is perhaps that of quantum artificial intelligence. This is because quantum systems excel at calculating probabilities for many possible choices their ability to provide continuous feedback to intelligent software is unparalleled in todays market. The estimated impact is immeasurable, spanning across fields and industries from AI in the automotive all the way to medical research. Lockheed Martin, American aerospace giant, was quick to realise the benefits, and is already leading by example with its quantum computer, using it for autopilot software testing. Take notes.
The principles of quantum mechanics are also used to address issues in cybersecurity. RSA (Rivest-Shamir-Adleman) cryptography, one of the worlds go-to methods of data encryption, relies on the difficulty of factoring (very) large prime numbers. While this may work with traditional computers, which arent particularly effective at solving multi-factor problems, quantum computers will easily crack these encryptions thanks to their unique ability to calculate numerous outcomes simultaneously.
Theoretically, Quantum key distribution takes care of this with a superposition-based encryption system. Imagine youre trying to relay sensitive information to a friend. To do so, you create an encryption key using qubits, which are then sent to the recipient over an optical cable. Had the encoded qubits been observed by a third party, both you and your friend will have been notified by an unexpected error in the operation. However, to maximise the benefits of QKD, the encryption keys would have to maintain their quantum properties at all times. Easier said than done.
It doesnt stop there. The brightest minds around the globe are constantly trying to utilise entanglement as a mode of quantum communication. So far, Chinese researchers were able to successfully beam entangled pairs of photons through their Micius satellite over a record-holding 745 miles. Thats the good news. The bad news is that, out of the 6 million entangled photons beamed each second, only one pair survived the journey (thanks, decoherence). An incredible feat nonetheless, this experiment outlines the kind of infrastructure we may use in the future to secure quantum networks.
The quantum race also saw a recent breakthrough advancement from QuTech, a research centre at TU Delft in the Netherlands their quantum system operates at a temperature over one degree warmer than absolute zero (-273 degrees Celsius).
While these achievements may seem insignificant to you and I, the truth is that, try after try, such groundbreaking research is bringing us a step closer to the tech of tomorrow. One thing remains unchanged, however, and that is the glaring reality that those who manage to successfully harness the power of quantum mechanics will have supremacy over the rest of the world. How do you think they will use it?
See more here:
How Quantum Mechanics will Change the Tech Industry - Unite.AI
- 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]