Closer to Teleportation, Atoms can be in Two Places at the Same Time

Closer to Teleportation, Atoms can be in Two Places at the Same Time

Researchers of the University of Bonn have shown that Caesium atoms do not follow well-defined paths

Can a penalty kick simultaneously score a goal and miss?

For very small objects, at least, this is possible: according to the predictions of quantum mechanics, microscopic objects can take different paths at the same time. The world of macroscopic objects follows other rules: the football always moves in a definite direction.

But is this always correct?

Physicists of the University of Bonn have constructed an experiment designed to possibly falsify this thesis. Their first experiment shows that Caesium atoms can indeed take two paths at the same time.

Almost 100 years ago physicists Werner Heisenberg, Max Born und Erwin Schrödinger created a new field of physics: quantum mechanics. Objects of the quantum world – according to quantum theory – no longer move along a single well-defined path.

Rather, they can simultaneously take different paths and end up at different places at once. Physicists speak of quantum superposition of different paths.

At the level of atoms, it looks as if objects indeed obey quantum mechanical laws. Over the years, many experiments have confirmed quantum mechanical predictions. In our macroscopic daily experience, however, we witness a football flying along exactly one path; it never strikes the goal and misses at the same time.

Why is that so?

“There are two different interpretations,” says Dr. Andrea Alberti of the Institute of Applied Physics of the University of Bonn.

“Quantum mechanics allows superposition states of large, macroscopic objects. But these states are very fragile, even following the football with our eyes is enough to destroy the superposition and makes it follow a definite trajectory.”

Do “large” objects play by different rules?

But it could also be that footballs obey completely different rules than those applying for single atoms. “Let us talk about the macro-realistic view of the world,” Alberti explains. “According to this interpretation, the ball always moves on a specific trajectory, independent of our observation, and in contrast to the atom.”

But which of the two interpretations is correct?

Do “large” objects move differently from small ones?

In collaboration with Dr. Clive Emary of the University of Hull in the U.K., the Bonn team has come up with an experimental scheme that may help to answer this question. “The challenge was to develop a measurement scheme of the atoms’ positions which allows one to falsify macro-realistic theories,” adds Alberti.

The physicists describe their research in the journal “Physical Review X”: With two optical tweezers they grabbed a single Caesium atom and pulled it in two opposing directions. In the macro-realist’s world the atom would then be at only one of the two final locations. Quantum-mechanically, the atom would instead occupy a superposition of the two positions.

See also: Scientists Report Teleportation of Physical Objects From One Location To Another

“We have now used indirect measurements to determine the final position of the atom in the most gentle way possible,” says the PhD student Carsten Robens. Even such an indirect measurement (see figure) significantly modified the result of the experiments.

Atoms can be in Two Places at the Same Time
Click to enlarge image | © Andrea Alberti / www.warrenphotographic.co.uk

This observation excludes – falsifies, as Karl Popper would say more precisely – the possibility that Caesium atoms follow a macro-realistic theory.

Instead, the experimental findings of the Bonn team fit well with an interpretation based on superposition states that get destroyed when the indirect measurement occurs.

All that we can do is to accept that the atom has indeed taken different paths at the same time.

“This is not yet a proof that quantum mechanics hold for large objects,” cautions Alberti.

“The next step is to separate the Caesium atom’s two positions by several millimetres. Should we still find the superposition in our experiment, the macro-realistic theory would suffer another setback.”

Image caption: The Bonn team has developed a measurement scheme that indirectly measures the position of an atom. In essence, one looks where the Caesium atom is not. The image clarifies this procedure. Let us assume that two containers are in front of us and a cat is hidden under one of them (a). However, we do not know under which one. We tentatively lift the right jar (b) and we find it empty. We, thus, conclude that the cat must be in the left jar and yet we have not disturbed it. Had we have lifted the left jar instead, we would have disturbed the cat (c), and the measurement must be discarded. In the macro-realist’s world, this measurement scheme would have absolutely no influence on the cat’s state, which remains undisturbed all the time. In the quantum world, however, a negative measurement that reveals the cat’s position, like in (b), is already sufficient to destroy the quantum superposition and to influence the result of the experiment. The Bonn physicists have exactly observed this effect.

Find us here

Get news from the CSGLOBE in your inbox each weekday morning

The views and opinions expressed in this article are those of the authors/source and do not necessarily reflect the position of CSGLOBE or its staff.

Paid content

Scientists Discover A Second Brain In Human Body, And It’s Located In The Butt

It turns out those gut feelings or pits in your stomach may actually come from your second...

The 10 Biggest Dangers Posed By Future Technology

It’s not easy predicting the future of technology. In the fifties it seemed a pretty much foregone conclusion that by 2015 we would all...

If You’re Alive in 30 Years, it’s Likely You Will be Alive in 1000 Years

Life extension is no joke. It's being pursued, avidly, by the chief engineer at Google, Ray Kurzweil, and is increasingly popular, with some scientists...

What's New Today

Georgia House Votes To Allow Citizens To Abolish Police Departments In The State

The Georgia House backed an effort on Friday to dissolve the Glynn County Police Department and any...

Leaked CDC document contradicts Pence claim that U.S. coronavirus cases ‘have stabilized’

Even as Vice President Mike Pence wrote in a Wall Street Journal op-ed published Tuesday that coronavirus...

Five bombshells about Trump from Bolton ‘s book

Excerpts from former national security adviser John Bolton ’s book about his time in the Trump administration...

Don’t Listen to Fox. Here’s What’s Really Going On in Seattle’s Protest Zone.

It seems I live in a city undergoing a “totalitarian takeover” that will lead to “fascist outcomes”...

MOST READ

What Is Agenda 21? Depopulation of 95% of the World By 2030

Most people are unaware that one of the greatest threats to their freedom may be a United Nations program which plans to depopulate 95%...

Five bombshells about Trump from Bolton ‘s book

Excerpts from former national security adviser John Bolton ’s book about his time in the Trump administration...

Don’t Listen to Fox. Here’s What’s Really Going On in Seattle’s Protest Zone.

It seems I live in a city undergoing a “totalitarian takeover” that will lead to “fascist outcomes”...

Scientists Discover A Second Brain In Human Body, And It’s Located In The Butt

It turns out those gut feelings or pits in your stomach may actually come from your second...

Back screens on trucks may pave way for safer overtaking

The Korean tech-giant Samsung has created a ‘Safety Truck’ which aims to reduce crashes when drivers attempt to overtake long vehicles on one-way roads....

This is What Americans Will Look like by 2050

The Changing Face of America We've become a country where race is no longer so black or white. It's no secret that interracial relationships are trending...

Wireless, Chemtrails And You

Next time you’re on a cellphone looking up at those long lingering plumes spreading across the sky, you might decide to end that call....

Water fluoridation DEFEATED in Portland

Citizens overwhelmingly reject dumping toxic fluoride chemicals into the water supply Voters in Portland, Oregon solidly defeated a city-wide water fluoridation measure yesterday, with 60%...

Scientists Have No Idea Why 120,000 Antelope Just Died

More than 120,000 saiga antelope — nearly 50 percent of the population worldwide — have died in Kazakhstan, and scientists still don’t know why. Kazakhstan’s...

10 Methods of Mind Control

The more one researches mind control, the more one will come to the conclusion that there is a coordinated script that has been in...

Drug company reveals $1 pill after Turing jacks prices 5,000%

The company that hiked the price of its AIDS and cancer drug by 5,000 percent is facing something that could be even more damaging...