wave-particle duality

The Tale of Joey Quantum

By Trevor Teasdel

November 29, 2015

He was an enigma they couldn't fathom but they had begun to ask questions and that was a start!

SPLITTING THE RADISH

By Jeffrey Willett

November 21, 2015

The collected letters of Einstein and Bohr on a simple model of salad

Link Between Photons

By Autumn Smith

November 14, 2015

Link realises there's only one way to fight this quantum wizard. He turns off the Triforce

THERE IS NO SPACE, TIME, CHANGE, OR CAUSATION IN THIS REALM

By Mary (Mariev) Finnegan

November 11, 2015

After the bus hits, Mary becomes aware of the light...

THE QUANTUM TRAIL

By JOYCE LONDON

November 7, 2015

The mean hombre from Particle City is heading for Shrodinger, and he's up to no good

Thor's Doll

By Travis Smith

November 4, 2015

The water of the fjord has become the curse of Grete's family, and now she must face it again

The Current

By Jennifer Blair

October 30, 2015

We sail until the whole of that ocean of shimmering gold either fuses together or breaks apart

Collider

By Gabriella Brand

October 29, 2015

Tom Perelli is flirting with the laws of quantum physics

Maya, the Persistence of Illusion

By Rakshin Nepolini

October 28, 2015

In this universe, Vishal is seeking revenge for the murder of his wife

Jam in a Quantum Tunnel

By Barry Rosenberg

October 26, 2015

Freaking fractals, the two professors have merged into one!

Quantum Theory: A to Z

H is for ... Hawking Radiation

In 1975, Stephen Hawking showed that the principles of quantum mechanics would mean that a black hole emits a slow stream of particles and would eventually evaporate.

B is for ... Bell's Theorem

In 1964, John Bell came up with a way of testing whether quantum theory was a true reflection of reality. In 1982, the results came in â€“ and the world has never been the same since!

M is for ... Multiverse

Our most successful theories of cosmology suggest that our universe is one of many universes that bubble off from one another. Itâ€™s not clear whether it will ever be possible to detect these other universes.

Q is for ... Quantum biology

A new and growing field that explores whether many biological processes depend on uniquely quantum processes to work. Under particular scrutiny at the moment are photosynthesis, smell and the navigation of migratory birds.

A is for ... Act of observation

Some people believe this changes everything in the quantum world, even bringing things into existence.

T is for ... Teleportation

Quantum tricks allow a particle to be transported from one location to another without passing through the intervening space â€“ or thatâ€™s how it appears. The reality is that the process is more like faxing, where the information held by one particle is written onto a distant particle.

J is for ... Josephson Junction

This is a narrow constriction in a ring of superconductor. Current can only move around the ring because of quantum laws; the apparatus provides a neat way to investigate the properties of quantum mechanics.

H is for ... Hidden Variables

One school of thought says that the strangeness of quantum theory can be put down to a lack of information; if we could find the â€œhidden variablesâ€ the mysteries would all go away.

C is for ... Computing

The rules of the quantum world mean that we can process information much faster than is possible using the computers we use now.

O is for ... Objective reality

Niels Bohr, one of the founding fathers of quantum physics, said there is no such thing as objective reality. All we can talk about, he said, is the results of measurements we make.

P is for ... Probability

Quantum mechanics is a probabilistic theory: it does not give definite answers, but only the probability that an experiment will come up with a particular answer. This was the source of Einsteinâ€™s objection that God â€œdoes not play diceâ€ with the universe.

T is for ... Tunnelling

This happens when quantum objects â€œborrowâ€ energy in order to bypass an obstacle such as a gap in an electrical circuit. It is possible thanks to the uncertainty principle, and enables quantum particles to do things other particles canâ€™t.

L is for ... Large Hadron Collider (LHC)

At CERN in Geneva, Switzerland, this machine is smashing apart particles in order to discover their constituent parts and the quantum laws that govern their behaviour.

F is for ... Free Will

Ideas at the heart of quantum theory, to do with randomness and the character of the molecules that make up the physical matter of our brains, lead some researchers to suggest humans canâ€™t have free will.

N is for ... Nonlocality

When two quantum particles are entangled, it can also be said they are â€œnonlocalâ€: their physical proximity does not affect the way their quantum states are linked.

A is for ... Alice and Bob

In quantum experiments, these are the names traditionally given to the people transmitting and receiving information. In quantum cryptography, an eavesdropper called Eve tries to intercept the information.

A is for ... Atom

This is the basic building block of matter that creates the world of chemical elements â€“ although it is made up of more fundamental particles.

D is for ... Dice

Albert Einstein decided quantum theory couldnâ€™t be right because its reliance on probability means everything is a result of chance. â€œGod doesnâ€™t play dice with the world,â€ he said.

Y is for ... Young's Double Slit Experiment

In 1801, Thomas Young proved light was a wave, and overthrew Newtonâ€™s idea that light was a â€œcorpuscleâ€.

C is for ... Cryptography

People have been hiding information in messages for millennia, but the quantum world provides a whole new way to do it.

S is for ... Superposition

Quantum objects can exist in two or more states at once: an electron in superposition, for example, can simultaneously move clockwise and anticlockwise around a ring-shaped conductor.

L is for ... Light

We used to believe light was a wave, then we discovered it had the properties of a particle that we call a photon. Now we know it, like all elementary quantum objects, is both a wave and a particle!

W is for ... Wave-particle duality

It is possible to describe an atom, an electron, or a photon as either a wave or a particle. In reality, they are both: a wave and a particle.

P is for ... Planck's Constant

This is one of the universal constants of nature, and relates the energy of a single quantum of radiation to its frequency. It is central to quantum theory and appears in many important formulae, including the SchrÃ¶dinger Equation.

G is for ... Gravity

Our best theory of gravity no longer belongs to Isaac Newton. Itâ€™s Einsteinâ€™s General Theory of Relativity. Thereâ€™s just one problem: it is incompatible with quantum theory. The effort to tie the two together provides the greatest challenge to physics in the 21st century.

R is for ... Radioactivity

The atoms of a radioactive substance break apart, emitting particles. It is impossible to predict when the next particle will be emitted as it happens at random. All we can do is give the probability that any particular atom will have decayed by a given time.

G is for ... Gluon

These elementary particles hold together the quarks that lie at the heart of matter.

R is for ... Reality

Since the predictions of quantum theory have been right in every experiment ever done, many researchers think it is the best guide we have to the nature of reality. Unfortunately, that still leaves room for plenty of ideas about what reality really is!

M is for ... Many Worlds Theory

Some researchers think the best way to explain the strange characteristics of the quantum world is to allow that each quantum event creates a new universe.

U is for ... Universe

To many researchers, the universe behaves like a gigantic quantum computer that is busy processing all the information it contains.

S is for ... SchrÃ¶dinger Equation

This is the central equation of quantum theory, and describes how any quantum system will behave, and how its observable qualities are likely to manifest in an experiment.

D is for ... Decoherence

Unless it is carefully isolated, a quantum system will â€œleakâ€ information into its surroundings. This can destroy delicate states such as superposition and entanglement.

S is for ... SchrÃ¶dingerâ€™s Cat

A hypothetical experiment in which a cat kept in a closed box can be alive and dead at the same time â€“ as long as nobody lifts the lid to take a look.

Q is for ... Qubit

One quantum bit of information is known as a qubit (pronounced Q-bit). The ability of quantum particles to exist in many different states at once means a single quantum object can represent multiple qubits at once, opening up the possibility of extremely fast information processing.

X is for ... X-ray

In 1923 Arthur Compton shone X-rays onto a block of graphite and found that they bounced off with their energy reduced exactly as would be expected if they were composed of particles colliding with electrons in the graphite. This was the first indication of radiationâ€™s particle-like nature.

B is for ... Bose-Einstein Condensate (BEC)

At extremely low temperatures, quantum rules mean that atoms can come together and behave as if they are one giant super-atom.

Z is for ... Zero-point energy

Even at absolute zero, the lowest temperature possible, nothing has zero energy. In these conditions, particles and fields are in their lowest energy state, with an energy proportional to Planckâ€™s constant.

W is for ... Wavefunction

The mathematics of quantum theory associates each quantum object with a wavefunction that appears in the SchrÃ¶dinger equation and gives the probability of finding it in any given state.

U is for ... Uncertainty Principle

One of the most famous ideas in science, this declares that it is impossible to know all the physical attributes of a quantum particle or system simultaneously.

I is for ... Information

Many researchers working in quantum theory believe that information is the most fundamental building block of reality.

E is for ... Entanglement

When two quantum objects interact, the information they contain becomes shared. This can result in a kind of link between them, where an action performed on one will affect the outcome of an action performed on the other. This â€œentanglementâ€ applies even if the two particles are half a universe apart.

R is for ... Randomness

Unpredictability lies at the heart of quantum mechanics. It bothered Einstein, but it also bothers the Dalai Lama.

V is for ... Virtual particles

Quantum theoryâ€™s uncertainty principle says that since not even empty space can have zero energy, the universe is fizzing with particle-antiparticle pairs that pop in and out of existence. These â€œvirtualâ€ particles are the source of Hawking radiation.

K is for ... Kaon

These are particles that carry a quantum property called strangeness. Some fundamental particles have the property known as charm!

I is for ... Interferometer

Some of the strangest characteristics of quantum theory can be demonstrated by firing a photon into an interferometer: the deviceâ€™s output is a pattern that can only be explained by the photon passing simultaneously through two widely-separated slits.

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