#quantum systems

[webeducationsciences]

Simulating Quantum Systems

Great video

Split Operator Method

[quantumcomputing111]

Quantum Computing

Introduction

The computers we have used have followed the same kind of basic rules from past years. They store large amounts of data and have changed the way we live and work. There are some certain problems they simply cannot solve sometimes within a time period. But quantum computing can do this. It represents a different way of thinking about computation itself.

Quantum Computing

What is quantum computing? It is an advanced form of computing that is based on the principles of quantum mechanics and the branch of physics that studies the behavior of very small particles, such as atoms and electrons.

Major technology companies are investing heavily in quantum research and have already developed experimental quantum processors. Although quantum computing is still in early stages, it has the potential to change many industries.

Limits of Classical Computing

Every classical computer processes information using bits. Each bit holds a value of 0 and 1. All computing tasks come down to billions of these binary decisions which are happening in fast succession. No matter whether they are sorting files or running AI models. This approach works perfectly for more tasks. When problems have many variables and possible outcomes, classical computers hit a wall.

How Cubits Work For Quantum Computing

Quantum computers replace bits with quantum bits called cubit. It is the ability of cubits to exist in a combination of o and 1, such a property called superposition. While a classical bit must choose a side, a cubit holds both possibilities until it is measured. This allows quantum computers to explore many solutions at the same time rather than testing them one by one. The practical result is a machine capable of processing complex problems at speed that classical computers cannot approach.

When two cubits are entangled, a change in the state of one fastly influences the other one regardless of any physical distance between them. The linkage allows quantum computers to coordinate calculations across multiple cubits in ways that multiply their processing power. A third party helps the system amplify the correct answers and cancel out incorrect ones is known as interference. It guides the computation towards the right solutions efficiently.

Importance of Quantum Computing

Solving Complex Problems

Some problems are very difficult for classical computers such as simulating molecular structure or factoring very large numbers. Quantum computing can solve these kinds of issues very effectively.

Advancement in Hospitality

Quantum computers can simulate molecular interactions accurately,  which helps researchers design new medicines and treatments faster than old or traditional methods.

Revolution in Cryptography

Current encryption systems depend on the difficulty of large numbers . Quantum computers could break these encryption methods. They are also helping to develop new, more secure quantum encryption techniques at the same time.

Improved Artificial Intelligence (AI)

Quantum computers can increase machine learning  by speeding up optimization and pattern recognition processes.

Scientific and Climate Research

Quantum simulations can help scientists to understand complex physical systems, improve climate models, and explore new materials.

Applications of Quantum Computing

Healthcare and Pharmaceuticals: quantum can simulate chemical reactions and protein structures which lead to faster drug development and personalized medicine.

Finance: In the financial sector, quantum computing can optimize investment portfolios, manage risks and prevent fraudulent activities.

Cryptography and Cybersecurity: quantum algorithms can break traditional encryptions but also create quantum encryption systems for safety that are more secure.

Logistics and Supply Chain Management: quantum computing can solve optimization problems such as finding the most efficient delivery routes or managing large scale supply chains.

Energy and material science: it can help in discovering new materials for batteries, solar panels and sustainable energy solutions.

Artificial Intelligence and Big Data: it can process large data sets more properly, improving data analysis and AI decision making.

Features of Quantum Computing

Superposition

In classical computing, a bit can be 0 or 1 at a time, but in the case of quantum computing, cubits can be both 0 and 1 simultaneously. It enables quantum computing to perform multiple calculations at once.

Entanglement

Entanglement is a unique property of quantum computing, where two or more bits can become interconnected. When cubits are entangled, the state of one cubit instantly influences the other cubit, even if they are distant.

Quantum Parallelism

Because cubits can exist in multiple states at once, quantum computers can evaluate many possible solutions simultaneously. This parallelism increases computational power for certain types of problems.

Interference

Quantum systems use third parties as interference for correct answers and cancel out incorrect ones. This helps in obtaining accurate results from complex computations.

High Speed

Quantum computers are not universally faster than classical computers but for complex problems, such as factorization and optimization, they can offer high speed improvements.

Conclusion

Quantum computers show a turning advancement in technology. It holds strong potential in solving complex issues to get a right solution. With ongoing research and investment by leading technology companies, quantum computing is expected to play a major role in shaping the future of science, industry and global innovation.

[i-hls]

2-In-1 Drone Capable of Vertical Lift-Off

  A German UAV company that specializes in vertical takeoff UAVs has just presented their new 2-in-1 vertical lift off drone. Quantum Systems has just shown off their Vector and Scorpion UAVs. The two seperate UAVs are both part of the same system. With a few simple steps, you can easily

https://i-hls.com/archives/92155

[i-hls]

מערכת שני כטב"מים באחד מסוגלת להמריא בצורה אנכית

מערכת שני כטב"מים באחד מסוגלת להמריא בצורה אנכית   חברה גרמנית לפיתוח וייצור כטב"מים המתמחה בהמראה אנכית, הציגה לאחרונה את מערכת הכטב"מים "שניים באחד" החדשה שלה. Quantum Systems הציגו את ה-Vector וה-Scorpion, כטב"מ ורחפן ששניהם חלק מאותה מערכת בלתי מאוישת. אפשר בקלות להפוך את ה-Scorpion,

https://i-hls.com/he/archives/92159

[fadelikeaflower]

Quantum memory, a step forward Quantum computers

Bright lasers

There is an article on nature.com about "Coherent storage and manipulation of broadband photons via dynamically controlled Autler-Townes splitting" and I am sure that to most of us that is just science fiction or "words that grow-ups use so we, the kids, do not understand their booty calls" :)

Photonic quantum information technologies rely on quantum memory for long-lived storage and coherent manipulation of short pulses of non-classical light. The optical quantum memories explored over the past two decades are based on various coherent light-matter interaction schemes, but despite impressive progress, practical memories featuring efficient, broadband and long-lived operation remain elusive, due to the technical demands and inherent limitations of the established schemes. Here, we introduce a technique for high-speed quantum memory and manipulation that overcomes these obstacles. This scheme relies on dynamically controlled absorption of light via the ‘Autler–Townes effect’, which mediates reversible transfer between photonic coherence and the collective ground-state coherence of the storage medium. We experimentally demonstrate proof-of-concept storage and signal processing capabilities of our protocol in a laser-cooled gas of rubidium atoms, including storage of nanoseconds-long single-photon-level laser pulses for up to a microsecond. This approach opens up new avenues in quantum optics, with immediate applications on atomic and solid-state platforms.

As I said. This is the "easy" part of the article and it has about 60 references :)

You will say, ok but what does it mean? Well, it means something on the line of "Really bright lasers that open up the atoms/atomic gas? which will then be used to store qubits"

So, using a bright laser. As someone else put it. Use a bigger hammer to fit stuff :)

In the quantum world and quantum computers, the quantum information (qubits) are transported using light (one photon = one qubit). The problem is STORING said qubit (photon) which, as you might know, are moving very very fast. So far they tried storing said photon in a very very cold gas which would do the trick but then you will need the photon (qubit) later you will have to take it out from there. So, we have slowly and carefully stored a qubit vs hammer it there with a laser.

One atom in the gas can have three states: - ground state, basically the natural state where the atom chills with his friends having a good beer (Carlsberg maybe?) - storage state basically is where the atom ends up after having the "drink" (absorbed the qubit) - transfer state, In this state the atom receives high energy necessary for qubit via a laser which stores the qubit and then changes the state from transfer to storage state. If the laser continues to shine on a stored atom it will change the state again from Storage to Transfer and the qubit is emitted as a photon again. Thus, the write/read is achieved.

By contrast, if you turn the laser off the qubit get stuck in storage state until you turn the laser back on. This works really well but it has some problems. Qubit has to have the same wavelength and the pulse of light has to be very long. Making the memory slow and, oh well, delicate.

The hammer way

Same states but this time very bright laser. If you change the power output of the laser the atom itself changes. It gives a good shake to the atom making contract and stretches making the transfer state split into two different states with a slightly different energy. This might mean that the photon will NOT be ideal for this BUT we only need the photon to overlap a bit with the wavelengths. If that is achieved then the Storage qubit state is reached. Researchers managed to prove exactly that. The researchers also have shown that their storage system is flexible because of the ability to change qubit properties. Imagine that in order to store an upcoming photon we just turn the power up on the laser and we zap it enough to absorb the photo. How about if we need the photon to come out with a specific energy? Make use of the laser control at low power to emit the qubit.

This method has the advantage of being faster than the current procedures. The control pulse is short and powerful and it stores qubits in the form of short pulses. It has the added value that we do not need to know the wavelength of the upcoming qubit. If it is the expected range we can interact with it. It can also use its adaptiveness in the case of two quantum systems. One requiring specific qubit wavelength while the other has a short duration. This read/write can convert.

Quantum computers and quantum systems are mindblowing if you think about them. Microwave systems for computation, photonic systems for transport and atomic states for memory. What an interesting and sometimes (I guess) frustrating field to be in.

Love, Dya!

[kickair8p]

Economics is Quantum

January 3rd 2018  “It certainly seems to be the case in science that, just before a field is completely disrupted by a major discovery, someone has to make a statement that sums up the field’s complacency for future historians. For years in the future, people can look at it and think, they had no idea what was about to hit them . . . in 1894, this task fell to the American physicist Albert Michelson, later Nobel laureate, when he announced that ‘it seems probable that most of the grand underlying principles have been firmly established, and that further advances are to be sought chiefly in the rigorous application of these principles’. A few years later, those principles were hit by the discovery that, at the subatomic scale at least, nature moves in sudden quantum leaps and jumps.

A century on, at the 2003 Presidential Address of the American Economic Association, the job fell to the Nobel laureate, economist Robert E Lucas Jr, who told his audience: ‘My thesis in this lecture is that macroeconomics in this original sense has succeeded: its central problem of depression-prevention has been solved, for all practical purposes, and has in fact been solved for many decades.’ A few years later, that conclusion was shattered by the discovery that the economy had suddenly leaped off a cliff.”

--- David Orrell, Has the time come for a quantum revolution in economics?

[nuadox]

Time crystals powering quantum computers

- By Dom Galeon , Futurism -

In Brief: Now that researchers have created time crystals, the next step is to understand more about this bizarre material. A team of researchers from Harvard University are doing just that in order to explore potential applications of time crystals.

Understanding the bizarre 

Time crystals can exist — it’s already been proven. Previously, two teams of researchers created their own time crystals that bend the laws of space and time. One of these, from the University of Maryland, used a chain of charged particles called ytterbium ions. Meanwhile, the other team from Harvard University created an artificial lattice using synthetic diamond.

Both setups demonstrated the quantum system behind such an object, and both produced new materials that work as time crystals.

Since it was first conceptualized in 2012 by physicist and Nobel laureate Frank Wilczek, time crystals have made its way out of the theoretical and into the real world. It took — you guessed it — time, because time crystals are essentially impossibilities. Simply put, a time crystal is like conventional crystals, but with an added twist. Instead of just lattices repeating in space, it also repeats in time by breaking what’s called a time-translation symmetry.

Because of this unique quality, time crystals exhibit movement while remaining in its lowest energy or ground state. This bizarre phenomenon is the first example of non-equilibrium phases of matter.

Applications in quantum technologies

Now, the Harvard researchers, led by physics professors Mikhail Lukin and Eugene Demler, want to understand more about this new kind of material. Its physics has been proven, yes, but a lot more remains to be uncovered about it. “There is now broad, ongoing work to understand the physics of non-equilibrium quantum systems,” Lukin explained in an interview for a Harvard press release.

Indeed, research into materials like time crystals are helping us understand the physics of both the quantum world and our own. Such scientific anomalies often lead to knowledge that allows us to transform these worlds. In this case, the time crystals have provided Lukin and the other researchers with an avenue to develop new technology — such as precision measurement tools, quantum sensors, and even atomic clocks.

A particularly interesting potential application of time crystals is in quantum computing. Quantum computers are going to be the next generation of computing machines, as these will be more powerful, more precise, and more efficient than existing computers. Its use of quantum bits (or qubits) to process data and information is the key. Instead of relying on bits of 0s and 1s, quantum computers use qubits that can be both a 0 and 1 at the same time because of a quantum phenomenon called “superposition.” Time crystals can, perhaps, help develop these into workable models.

“This is an area that is of interest for many quantum technologies,” Lukin said, “because a quantum computer is basically a quantum system that’s far away from equilibrium. It’s very much at the frontier of research…and we are really just scratching the surface.”

Once realized, quantum computers could revolutionize the way we do research by solving the most complex problems in a flash.

References: Phys.org, Harvard University, Nature

This article was originally published on futurism.com as “The First Quantum Computer You Own Could Be Powered by a Time Crystal”. The title has been changed to reflect Nuadox style considerations.

+Credits:

Author: Dom Galeon

Editor: Christianna Reedy

Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)

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[talesofdrunkennessandcruelty]

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