First Object Teleported from Earth to Orbit [China leaves West in the dust]

[Suppressed]

First Object Teleported from Earth to Orbit
Researchers in China have teleported a photon from the ground to a satellite orbiting more than 500 kilometers above.
by Emerging Technology from the arXiv  July 10, 2017

Last year, a Long March 2D rocket took off from the Jiuquan Satellite Launch Centre in the Gobi Desert carrying a satellite called Micius, named after an ancient Chinese philosopher who died in 391 B.C. The rocket placed Micius in a Sun-synchronous orbit so that it passes over the same point on Earth at the same time each day.

Micius is a highly sensitive photon receiver that can detect the quantum states of single photons fired from the ground. That’s important because it should allow scientists to test the technological building blocks for various quantum feats such as entanglement, cryptography, and teleportation.

Today, the Micius team announced the results of its first experiments. The team created the first satellite-to-ground quantum network, in the process smashing the record for the longest distance over which entanglement has been measured. And they’ve used this quantum network to teleport the first object from the ground to orbit.

Teleportation has become a standard operation in quantum optics labs around the world. The technique relies on the strange phenomenon of entanglement. This occurs when two quantum objects, such as photons, form at the same instant and point in space and so share the same existence. In technical terms, they are described by the same wave function.



The curious thing about entanglement is that this shared existence continues even when the photons are separated by vast distances. So a measurement on one immediately influences the state of the other, regardless of the distance between them.

Back in the 1990s, scientists realized they could use this link to transmit quantum information from one point in the universe to another. The idea is to “download” all the information associated with one photon in one place and transmit it over an entangled link to another photon in another place.

This second photon then takes on the identity of the first. To all intents and purposes, it becomes the first photon. That’s the nature of teleportation and it has been performed many times in labs on Earth.

Teleportation is a building block for a wide range of technologies. “Long-distance teleportation has been recognized as a fundamental element in protocols such as large-scale quantum networks and distributed quantum computation,” says the Chinese team.

...

It also shows China’s obvious dominance and lead in a field that, until recently, was led by Europe and the U.S.—Micius would surely have been impressed. But an important question now is how the West will respond.

Ref: arxiv.org/abs/1707.00934: Ground-to-satellite quantum teleportation

Excerpt.  Read more at https://www.technologyreview.com/s/608252/first-object-teleported-from-earth-to-orbit/

[driftdiver]

This article was probably paid for by china.

[GtHawk]

http://www.youtube.com/watch?v=nW-NiGp1gys

[Suppressed]

This article was probably paid for by china.

Could be, but it's correct.  This is a very important advance for future technology.

[kevindavis007]

http://www.youtube.com/watch?v=tQ9VIswgcU4





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[DB]

Entanglement seems like one of the strangest properties in physics, especially when distance doesn't seem to matter.

Faster than light communications?

[Smokin Joe]

Over 32 days, they sent millions of photons and found positive results in 911 cases. “We report the first quantum teleportation of independent single-photon qubits from a ground observatory to a low Earth orbit satellite—through an up-link channel— with a distance up to 1400 km,” says the Chinese team.

911 successes of millions of photons? Okay, neat, but I'll take the bus...

[Oceander]

Entanglement seems like one of the strangest properties in physics, especially when distance doesn't seem to matter.

Faster than light communications?

Generally, no.  Trying to embody information in the entangled particles breaks the entanglement. 

[Snarknado]

What's the difference between sun-synchronous and geosynchronous?

[Joe Wooten]

What's the difference between sun-synchronous and geosynchronous?

A Sun-synchronous orbit is a near polar orbit around Earth in which the satellite passes over any given point of the planet's surface at the same local solar time. A geo synchronous orbit is an equatorial orbit where the satellite is hanging over the same spot on earth all the time.

[Snarknado]

A Sun-synchronous orbit is a near polar orbit around Earth in which the satellite passes over any given point of the planet's surface at the same local solar time. A geo synchronous orbit is an equatorial orbit where the satellite is hanging over the same spot on earth all the time.

I thought the latter was geostationary? Aren't GPS satellites considered geosynchronous?

[Joe Wooten]

I thought the latter was geostationary? Aren't GPS satellites considered geosynchronous?

No, GPS satellites are low earth orbit satellites. They work because there is a huge constellation of them in orbit so that at least three are overhead on any one spot on earth at any time.


OK, I stand corrected. I always assumed that geosynchronous orbits and geostationary orbits were one and the same.

Geosynchronous - An orbit around Earth whose orbital period is equal to a sidereal day (23 hours, 56 minutes), irrespective of its inclination.

- A person on a point on Earth, will see a satellite in this orbit in the same place in the sky at the same time of the day, everyday.

Geostationary - A geosynchronous orbit around Earth at 35,786 km above the equator, so that it remains stationary as seen from Earth.

- A person on any point on Earth, will see a satellite in this orbit stationary w.r.t his position, just like a star in the sky.


Every geostationary orbit is a geosynchronous orbit but not the other way around.

[Snarknado]

No, GPS satellites are low earth orbit satellites. They work because there is a huge constellation of them in orbit so that at least three are overhead on any one spot on earth at any time.


OK, I stand corrected. I always assumed that geosynchronous orbits and geostationary orbits were one and the same.

Geosynchronous - An orbit around Earth whose orbital period is equal to a sidereal day (23 hours, 56 minutes), irrespective of its inclination.

- A person on a point on Earth, will see a satellite in this orbit in the same place in the sky at the same time of the day, everyday.

Geostationary - A geosynchronous orbit around Earth at 35,786 km above the equator, so that it remains stationary as seen from Earth.

- A person on any point on Earth, will see a satellite in this orbit stationary w.r.t his position, just like a star in the sky.


Every geostationary orbit is a geosynchronous orbit but not the other way around.

Interesting - GPS are termed semi-synchronous, and sun-synchronous precesses to maintain fixed alignment with the sun...

Edit> When they say "near-polar" I'm guessing they mean perpendicular to the earth-orbit plane rather than tilted with earth's axis...

[Joe Wooten]

Edit> When they say "near-polar" I'm guessing they mean perpendicular to the earth-orbit plane rather than tilted with earth's axis...

yes

[GourmetDan]

Entanglement seems like one of the strangest properties in physics, especially when distance doesn't seem to matter.

Faster than light communications?

Entanglement points to the existence of dimensions in addition to the 4 that we normally experience... higher dimensions make possible that which is impossible in lower dimensions...