New quantum acoustic memories can make quantum computers more effective.

 

"Illustration of a silicon-vacancy center in a diamond crystal lattice. Credit: Doug Quade. The same tiny vibrations that carry quantum information across a chip could also keep that information from fading away."  (ScitechDaily, Harvard Scientists Use Tiny Sound Waves To Protect Quantum Information)

Quantum systems are very problematic tools. They are very sensitive to electromagnetic vibrations. This means. That researchers. Must find new ways to store information in quantum systems. Traditional quantum computers are hybrid systems. The binary computer controls the qubits. In. The quantum processors. And then that information is stored in the binary form. This makes those systems slow. If. The system can store information as qubits. That makes it faster. 

New types of quantum memories can store information as acoustic waves. An acoustic wave is a molecular- or atomic-scale wave. Theoretically, we could also store information directly in sound waves. If. We could freeze those sound waves in their form.

It is possible. To store those sound waves on tape. This acoustic tape means the layer. That is, in the chamber, there is gas. When a sound wave travels over that tape. The system pushes gas very fast against that tape. If. That happens fast enough. 

The pressure system can trap those sound or pressure waves on the layer. And then a laser could read the form of those atoms. 

Today. Researchers are testing phonons as tools. That can protect quantum information. Using tiny sound waves. Sound waves can travel in a diamond carbon structure. That structure. 

You see in the image above. Can turn diamonds into tiny LRAD devices. Those systems can aim sound waves with very high accuracy. And theoretically. If. Researchers could create quantum entanglement through that channel. But. Another possibility is to store information. Into. Acoustic qubits. 

Harvard scientists dressed those qubits using acoustic fields. Or they created dressed states. The system creates superposition between fields. That surround silicon vacancy states. 

“Because the protective field is mechanical, it can operate inside the same phononic cavities intended to connect stationary quantum nodes. Phonons could therefore serve two functions in one device: moving quantum information between qubits and shielding that information while it is stored.” (ScitechDaily, Harvard Scientists Use Tiny Sound Waves To Protect Quantum Information)

 Eliza Cornell, Ph.D., describes it like that. Researchers solved two problems. Shew says that. 

“We want the spin to have strong interaction with phonons, and we want the spin to have a long coherence time. Our paper demonstrates a method of extending the coherence time that is compatible with the silicon-vacancy center being in a cavity.” (ScitechDaily, Harvard Scientists Use Tiny Sound Waves To Protect Quantum Information)

“The technique extended the coherence time of the silicon-vacancy spin by roughly threefold, showing that continuous-wave mechanical noise suppression can protect quantum information in a real device. (ScitechDaily, Harvard Scientists Use Tiny Sound Waves To Protect Quantum Information)

“The researchers also achieved a Rabi frequency of 800 megahertz, enabling exceptionally fast control of the spin. Together, longer coherence and rapid operation could support high-fidelity quantum gates mediated by phonons, bringing compact on-chip quantum networks closer to practical use.” (ScitechDaily, Harvard Scientists Use Tiny Sound Waves To Protect Quantum Information)

The acoustic qubit can store an acoustic field around it. So those memories are actually phonons. Or they are phonons. Dressed with acoustic fields. 

Interaction directly with phonons is difficult to control. A useful quantum memory must preserve coherence. This means. It must retain its quantum state long enough. It can store, process, and transmit information. Environmental noise can quickly destroy that state.

Noise from the environment. It destroys the qubit. Another big problem is: How to multiply oscillations? Between phonons?  In those systems, oscillations must be precisely multiplied. 

In this case, those phonons can be in direct lines. And some laser or acoustic beam travels over them. And. That makes it possible to multiply those oscillations over those fields. The system must put those qubits in line. And then. Press. A quantum channel that allows them to transmit information directly between those qubits. 

“A dressed qubit is described as “wearing” the continuous acoustic field surrounding it. This changes how the qubit responds to its environment, making it less vulnerable to low-frequency noise that would otherwise disrupt its stored information.” (ScitechDaily, Harvard Scientists Use Tiny Sound Waves To Protect Quantum Information)

When. Information is stored in acoustic form. Into silicon vacancy centers in those diamonds. In the most exciting model, those vacancy centers could be in the nanodiamonds. Those diamonds can form quantum channels in the quantum chip. 

So, as is said in this text. 

Silicon vacancy centers could store acoustic information. This technology allows researchers to build new types of quantum information storage. In that solution, the diamond’s carbon structure prevents those vacancy centers from delivering the wave motion. 

When those vacancy centers get a signal. Silicon vacancy centers start to deliver the wave motion. They stored. During this process, silicon vacancy centers store acoustic waves in their structure. And then they deliver that wave motion when they get an impulse that triggers the information delivery. This type of mass memory can be a new way to store information in quantum systems. 

They stored. Those diamonds can also be used. To create pressure. That makes wires superconducting. This is one way to create new, smaller quantum computers. And maybe someday. Those tools. They can turn into desktop models. 

https://scitechdaily.com/harvard-scientists-use-tiny-sound-waves-to-protect-quantum-information/

Space weapons are coming.

U.S. confirmed it has weapons in space. This is the next step in the arms race. Satellites play a big role in the modern military. That's why the military wants to affect them. GPS, communication, and reconnaissance satellites are high-value targets. And. Without those systems. intelligent warfare is impossible. The next point is that satellites disturb fire-control radars. ECM satellites are used in Iran. Those systems can disrupt drone swarms. And other data communications. 

This is why every nation with space capacity develops ASAT systems. A system that threatens ECM and radar satellites can be a large version of anti-radiation missiles. 

The anti-satellite weapons might not destroy targeted satellites. They can try to jam their signals. Or slam their systems down with an EMP pulse. In those cases, the weapon can use capacitor-based systems. That sends high-power microwaves or radio waves to targeted satellites. 

"A Davy Crockett micro nuke at the Aberdeen Proving Ground, Maryland, 1961" (Wikipedia, Davy Crockett (nuclear device)

“A notional rendering of China's reusable Shenlong space plane. (Image credit: Erik Simonsen/Getty Images)” (Space.com)

The killer satellites' mission is to destroy other satellites. Or, they can be used to create high-power EMP signals using nuclear warheads. Requires a new type of reaction. The nuclear-based EMP is one of the most powerful weapons. There is a possibility that the satellite can drop nuclear weapons on targets. So-called. FOBS (Fractional Orbital Bombardment Systems). They can be miniature space shuttles. Those shuttles can hang in orbit and wait for orders to attack. In that case, those systems can be stealth shuttles that make kamikaze attacks against ground targets. There is suspicion that. The Chinese Shenlong miniature space shuttle can be a prototype for this kind of weapon. 

If. An orbiting satellite carries a nuclear weapon. It requires very fast reactions. The same way. If. The hunter-killer satellite starts to follow a friendly satellite. That requires fast counteractions. The problem with killer satellites is simple. Any satellite can act as this type of weapon. Especially microsatellites can be tools. They can destroy other satellites with kinetic energy. The miniature satellite can collide with other satellites. 

Or they can involve high-power EMP systems. One version of those tools is a micro nuke that detonates in an air tank. A 20-ton nuclear detonator can form a so-called controlled EMP pulse. Or they can involve high-power capacitors. That pushes lots of energy. To microwave- or radio-wave-based systems. Those satellites can wait in orbit. 

Things like miniature shuttles that can wait in orbit to attack require counter-actions. Those shuttles can carry internal nuclear warheads. This makes them so-called super drones. Satellites can also drop drone swarms into operational areas. Those systems are dangerous to troops and civilians. This means that drone swarms that satellites can deliver can hunt individual people on the streets. That makes those tools excellent assassination tools. And those systems require fast reactions. 

https://www.space.com/china-space-plane-depoyed-mystery-objects

https://www.twz.com/space/new-details-on-how-space-force-has-waged-electronic-warfare-against-iran

https://www.twz.com/space/u-s-admits-it-has-weapons-in-orbit

https://en.wikipedia.org/wiki/Davy_Crockett_(nuclear_device)

Fusion and its problems.

The biggest technical problem in fusion seems simple. How to control plasma. Theoretically, that requires only. That the outermost layer of the plasma belt is at a higher energy level. Than the inner plasma that travels in Tokamak reactors. The higher energy level. At the outermost layer of that plasma. Traps energy in the plasma ring. 

When fusion begins. Energy. That comes from the middle of the plasma ring. It will break the plasma. So, fusion starts in the middle of the plasma ring. That plasma ring travels in a magnetic tube. That keeps it away from the walls of the Tokamak reactors. That plasma is hotter than the Sun.  The system must increase the temperature to compensate for the Sun’s gravitational effect. 

This means the reactor compresses plasma in the middle of the magnetic tube. And that causes another problem. When. fusion starts. Ignition pushes ions, or high-temperature plasma, away from the center. This spreads the plasma all around the Tokamak reactor. That also causes the plasma to touch the reactor’s structure. When the plasma, which is at temperatures of billions of degrees, destroys the reactor. 

The solution could be. The system pushes back when fusion starts. This means. The energy level is at the outermost layer of the plasma. It should be higher than the center of the plasma ring. The idea is this. The energy level in the outermost layer of the plasma ring is higher than in its inner layers. 

That outside energy pushes the deuterium and tritium together, forming helium. Lithium deuteride, lithium hydride: normal hydrogen is replaced. Using deuterium is a good source for deuterium and tritium. But that system requires a neutron source. 

In thermonuclear weapons. The small nuclear bomb. Creates the needed energy and neutrons to start fusion. Maybe. Fusion reactors. They could use a neutron source and laser-accelerated neutrons to create conditions that can start fusion in lithium deuteride. 

The outer layer’s higher energy level helps to keep that plasma in that form. If. The energy level in the middle of the plasma ring rises higher than the outermost layer. That energy breaks the plasma ring. And fusion is impossible. The key element is to keep that plasma in one form.

If that is possible. Researchers. Are one step closer to a fusion power plant. The technical problems with this type of reactor are huge. But if that reactor can transport energy into the network. This can be the next step. To benefit renewable energy. The main problem with a hydrogen economy is how to produce hydrogen.

Hydrogen is a promising energy source. If it is produced using clean energy. Things. Like aircraft carriers. They could produce hydrogen for their air wing as fuel. Fusion reactors can offer a clean way to produce hydrogen. 

https://en.wikipedia.org/wiki/Lithium_hydride

https://en.wikipedia.org/wiki/Tokamak