Interesting read:


Future Quantum Networks

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rOZZ
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Alas,

I have finished my course in Quantum Mechanics from the Teaching Company and am underwhelmed. I did learn that the underlying logic is in fact Boolean (two state) and that a Qubit and an entangled bit gives you two binary bits of information. All of the rest was repetition of the hype that I was trying to get to the bottom of.

The claim is that a quantum computer can try all possible calculations at once to solve compute intensive problems such as factoring 500 digit numbers and so on. No explanation given for the logic, program or hardware as to how this might work.

Also as stated earlier "superposition comes" about by multiplying a state vector by a complex conjugate vector.

So, I will next try to take the lectures from Berkley to unravel some of this.

No explanation given for the logic, program or hardware as to how this might work.

You may read this.
Quantum logic
https://en.wikipedia.org/wiki/Quantum_gate
Quantum programming.
https://en.wikipedia.org/wiki/Quantum_programming
Quantum hardware.
Entangled electrons.
http://spectrum.ieee.org/tech-talk/computing/hardware/silicon-quantum-computers-look-to-scale-up
http://spectrum.ieee.org/semiconductors/materials/will-silicon-save-quantum-computing
Entangled photons.
http://motherboard.vice.com/read/single-photon-quantum-computer-chips-are-scaling-up

Alas,

I have finished my course in Quantum Mechanics from the Teaching Company and am underwhelmed. I did learn that the underlying logic is in fact Boolean (two state) and that a Qubit and an entangled bit gives you two binary bits of information. All of the rest was repetition of the hype that I was trying to get to the bottom of.

The claim is that a quantum computer can try all possible calculations at once to solve compute intensive problems such as factoring 500 digit numbers and so on. No explanation given for the logic, program or hardware as to how this might work.

Also as stated earlier "superposition comes" about by multiplying a state vector by a complex conjugate vector.

So, I will next try to take the lectures from Berkley to unravel some of this.

I have the same course, and was left with similar questions.

Steve

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Warning, addicted to SETI crunching!
Crunching as a member of GPU Users Group.
GPUUG Website

Alas,

I have finished my course in Quantum Mechanics from the Teaching Company and am underwhelmed. I did learn that the underlying logic is in fact Boolean (two state) and that a Qubit and an entangled bit gives you two binary bits of information. All of the rest was repetition of the hype that I was trying to get to the bottom of.

The claim is that a quantum computer can try all possible calculations at once to solve compute intensive problems such as factoring 500 digit numbers and so on. No explanation given for the logic, program or hardware as to how this might work.

Also as stated earlier "superposition comes" about by multiplying a state vector by a complex conjugate vector.

So, I will next try to take the lectures from Berkley to unravel some of this.

I have the same course, and was left with similar questions.

Steve

Maybe it's because, in the end, they don't really know much more than you do.

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Bob DeWoody

My motto: Never do today what you can put off until tomorrow as it may not be required. This no longer applies in light of current events.

Alas,
I have finished my course in Quantum Mechanics from the Teaching Company and am underwhelmed. I did learn that the underlying logic is in fact Boolean (two state) and that a Qubit and an entangled bit gives you two binary bits of information. All of the rest was repetition of the hype that I was trying to get to the bottom of.
The claim is that a quantum computer can try all possible calculations at once to solve compute intensive problems such as factoring 500 digit numbers and so on. No explanation given for the logic, program or hardware as to how this might work.
Also as stated earlier "superposition comes" about by multiplying a state vector by a complex conjugate vector.
So, I will next try to take the lectures from Berkley to unravel some of this.

I have the same course, and was left with similar questions.
Steve

Maybe it's because, in the end, they don't really know much more than you do.

It's a difference to know that something works and understand why it works.
In QM scientists are often told to "shut up and calculate".
Never the less QM works and we have already applications using QM effects.
https://en.wikipedia.org/wiki/Quantum_tunnelling#Applications

BTW
Many physicists believe that entanglement is the essence of quantum weirdness — and some now suspect that it may also be the essence of space-time geometry.
http://www.nature.com/news/the-quantum-source-of-space-time-1.18797

... Gravitational waves stretch the very fabric of our universe...

[...]

Will not the laser beams themselves be stretched/compressed as a gravity passes through? And in exactly to the same degree as the surrounding support structure?

Yes as I understand.

Hence should we not expect to see a null result?...


Another Michelson-Moreley null result?

No because the light travels a much further distance than the length of the interferometer, to quote

And because the role of these beam splitters is to transmit and reflect part of the light, so it means that the light which goes through-- which is transmitted through this beam splitter-- goes to the mirror, is reflected. Some of it goes through, but another part is reflected, and so some of the light will go back and forth for quite a while, and similarly on the other side.

Thanks, good answer...

The "the light travels a much further distance than the length of the interferometer" and time-of-flight with the light-speed light and the light-speed passing of a gravitational wave makes for quite a mind bender!


Which comes to a connected question:

Do the LIGO/VIRGO/GEO detectors detect the gravitational influence of our sun and moon over a 24 hour period?... (In a similar way to sensing the change for a gravity wave?...)


Keep searchin',
Martin

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Do the LIGO/VIRGO/GEO detectors detect the gravitational influence of our sun and moon over a 24 hour period?... (In a similar way to sensing the change for a gravity wave?...)

AFAIK the LIGO is not sensitive enough to detect something as small as our moon and our relationship to the sun is not dynamic enough to give us any. The current idea as I have seen it is that it takes something real dynamic such as a pair of neutron stars rapidly rotating around each other or possibly a supernova to create gravity waves. Neither our moon or even the sun have enough mass to create waves.

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That is true as I understand it, which is not very well. On the second thought I think the frequency of the weak wave the Earth/ Moon pair would be very high due to their small diameters vs a star which is much lower.

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Do the LIGO/VIRGO/GEO detectors detect the gravitational influence of our sun and moon over a 24 hour period?... (In a similar way to sensing the change for a gravity wave?...)

Yes/no. Which answer depends upon what you mean by detect. The tidal effects have to be removed from the data, so obviously it detects that. The waves in space time aren't detectable as the frequency is outside the range they are searching. Much of this technical limits might be better addressed at the Einstein@home project.

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What Is Li-Fi? Meet The Revolutionary Wireless Technology That Is 100 Times Faster Than Wi-Fi

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rOZZ
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Physicists have learned how to restore the entanglement of 'untangled' quantum light

Wow Julie, that is interesting.
What is a Homodyne detector?
How do you achieve Noiseless amplification?
Could you maybe explain the phenomenon, for us simpletons, in stupid talk?

Thanks!

I'm afraid I am also a layperson when it comes to the field of quantum entanglement 297902, but I thought it to be a rather interesting article to post here and read Tullio's, Janne's and other people's thoughts on it.

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rOZZ
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Interesting article on weather modification and Geo-engineering:


https://www.intellihub.com/dr-michio-kaku-admits-government-weather-control-cbs-news/

Weather modification and Geo-engineering are both taboo topics for most people, with many believing that no such programs exist. Despite the mountains of proof put forward by whistle blowers and and independent researchers, weather modification is just too crazy for some people to believe.

At the risk of sounding a tad too political, I am interested to hear people's thoughts on the above subject.

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rOZZ
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The term "Weather Modification" in this context refers to cloud seeding to encourage rain drops to form. This has been going on for decades by seeding clouds with silver iodide with some success.

The most common chemicals used for cloud seeding include silver iodide, potassium iodide and dry ice (solid carbon dioxide). Liquid propane, which expands into a gas, has also been used. This can produce ice crystals at higher temperatures than silver iodide.

Now, high powered lasers are being tried to induce the formation of ions in the cloud which encourage the formation of rain droplets.

There is nothing sinister in these efforts--mainly farmers trying to survive a drought condition.

The term "Weather Modification" in this context refers to cloud seeding to encourage rain drops to form. This has been going on for decades by seeding clouds with silver iodide with some success.

The most common chemicals used for cloud seeding include silver iodide, potassium iodide and dry ice (solid carbon dioxide). Liquid propane, which expands into a gas, has also been used. This can produce ice crystals at higher temperatures than silver iodide.

Now, high powered lasers are being tried to induce the formation of ions in the cloud which encourage the formation of rain droplets.

There is nothing sinister in these efforts--mainly farmers trying to survive a drought condition.

Thanx for your clarification, William. Found another interesting article on the matter in the meanwhile:

http://geopolitics.co/2015/06/06/us-air-force-admits-they-can-control-weather/

This is not the first time a public official has acknowledged that HAARP and weather control is not only possible, but has been and continues to be, used as a “super weapon,” as evidenced by a statement in 1997 by former U.S. Defense Secretary William Cohen, where he said “Others [terrorists] are engaging even in an eco-type of terrorism whereby they can alter the climate, set off earthquakes, volcanoes remotely through the use of electromagnetic waves… So there are plenty of ingenious minds out there that are at work finding ways in which they can wreak terror upon other nations…It’s real, and that’s the reason why we have to intensify our [counterterrorism] efforts.”

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rOZZ
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Physicists have learned how to restore the entanglement of 'untangled' quantum light

Wow Julie, that is interesting.
What is a Homodyne detector?
How do you achieve Noiseless amplification?
Could you maybe explain the phenomenon, for us simpletons, in stupid talk?
Thanks!

I'm afraid I am also a layperson when it comes to the field of quantum entanglement 297902, but I thought it to be a rather interesting article to post here and read Tullio's, Janne's and other people's thoughts on it.

I'm also a layperson.
The pic shows the apparatus to make photons entangled.
I have still to struggle with QM theories.
But I found this on the net that explain how the parts work.
Homodyne detector.
https://en.wikipedia.org/wiki/Interferometry
Noiseless amplification.
Works very much the same as amplification of light in fibers.
http://www.nature.com/nphys/journal/v9/n1/full/nphys2469.html

The term "Weather Modification" in this context refers to cloud seeding to encourage rain drops to form. This has been going on for decades by seeding clouds with silver iodide with some success.

The most common chemicals used for cloud seeding include silver iodide, potassium iodide and dry ice (solid carbon dioxide). Liquid propane, which expands into a gas, has also been used. This can produce ice crystals at higher temperatures than silver iodide.

Now, high powered lasers are being tried to induce the formation of ions in the cloud which encourage the formation of rain droplets.

There is nothing sinister in these efforts--mainly farmers trying to survive a drought condition.

I bet there's a California behind that conspiracy...& that sinister A. Schwarzenegger!
LoL :D LoL :D LoL

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I don't see how diameter of a source would affect frequency.

Picture a pond of water, toss a bb into the water and measure the distance between the ripples. Now toss a stone the size of a basketball into the water, the distance between the ripples will be much larger, hence a lower frequency.The current hypothesis posits gravity works the same way.

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Physicists confirm thermodynamic irreversibility in a quantum system

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rOZZ
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Spooky science

Tangled up

It's hard for me to understand this stuff, but I find it interesting.

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The mind is a weird and mysterious place