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Archive for the ‘quantum physics’ category: Page 384

Sep 7, 2021

Quantum Machines plans to expand quantum orchestration platform with $50M investment

Posted by in categories: computing, quantum physics

Quantum Machines, an Israeli startup that is building the classical hardware and software infrastructure to help run quantum machines, announced a $50 million Series B investment today.

Today’s round was led by Red Dot Capital Partners with help from Exor, Claridge Israel, Samsung NEXT, Valor Equity Partners, Atreides Management, LP, as well as TLV Partners, Battery Ventures, 2i Ventures and other existing investors. The company has now raised approximately $83 million, according to Crunchbase data.

While quantum computing in general is in its early days, Quantum Machines has developed a nice niche by building a hardware and software system, what they call The Quantum Orchestration Platform, that helps run the burgeoning quantum machines, leaving it plenty of room to grow as the industry develops.

Sep 7, 2021

Black hole made in the lab shows signs of quantum entanglement

Posted by in categories: cosmology, quantum physics

Circa 2020


Efforts to study black holes in the lab with versions that trap sound instead of light may have revealed a key prediction made by Stephen Hawking.

Sep 7, 2021

Photon quantum entanglement in the MeV regime and its application in PET imaging

Posted by in category: quantum physics

Gamma photons used in positron emission tomography are predicted to be produced in an entangled state. Here, the authors simulate the effects of entanglement and test them through comparison with experimental data from a PET demonstrator apparatus, showing the potential gains in background suppression.

Sep 7, 2021

Quantum teleportation of physical qubits into logical code spaces

Posted by in categories: computing, quantum physics

Quantum computers in regular logical computers.


Quantum teleportation and quantum error correction play crucial roles in fault-tolerant quantum computing. Here, we implemented error-correctable quantum teleportation to manipulate a logical qubit and observed the protection of quantum information. Our work presents a useful technology for scalable quantum computing and can serve as a quantum simulator for holographic quantum gravity.

Quantum error correction is an essential tool for reliably performing tasks for processing quantum information on a large scale. However, integration into quantum circuits to achieve these tasks is problematic when one realizes that nontransverse operations, which are essential for universal quantum computation, lead to the spread of errors. Quantum gate teleportation has been proposed as an elegant solution for this. Here, one replaces these fragile, nontransverse inline gates with the generation of specific, highly entangled offline resource states that can be teleported into the circuit to implement the nontransverse gate. As the first important step, we create a maximally entangled state between a physical and an error-correctable logical qubit and use it as a teleportation resource. We then demonstrate the teleportation of quantum information encoded on the physical qubit into the error-corrected logical qubit with fidelities up to 0.786.

Sep 7, 2021

Quantum Computing Breakthrough: Entanglement of Three Spin Qubits Achieved in Silicon

Posted by in categories: computing, information science, quantum physics

A three-qubit entangled state has been realized in a fully controllable array of spin qubits in silicon.

An all-RIKEN team has increased the number of silicon-based spin qubits that can be entangled from two to three, highlighting the potential of spin qubits for realizing multi-qubit quantum algorithms.

Quantum computers have the potential to leave conventional computers in the dust when performing certain types of calculations. They are based on quantum bits, or qubits, the quantum equivalent of the bits that conventional computers use.

Sep 6, 2021

Unexpected Peaks in Spectrum Upset Conventional Models of Exotic Quantum Material

Posted by in categories: materials, quantum physics

Mott Insulator Exhibits a Sharp Response to Electron Injection In a finding that will give theorists plenty to ponder, an all-RIKEN team has observed an unexpected response in an exotic material known as a Mott insulator when they injected electrons into it. This observation promises to give physicists new insights into such materials, which are closely related to high-temperature superconductors.

Sep 6, 2021

Google Gets Us Closer to Error-Corrected Quantum Computing

Posted by in categories: alien life, computing, quantum physics

One of the biggest barriers standing in the way of useful quantum computers is how error-prone today’s devices are.

Why does this matter?

Because creating reliably successful quantum computers will allow us to better control the building blocks of life and the universe.

Sep 5, 2021

Large-Scale Simulations Of The Brain May Need To Wait For Quantum Computers

Posted by in categories: computing, neuroscience, quantum physics

And, we have Quantum Computers of course, and they’ll be radically more advanced by 2025.


Why quantum computers, if successfully built, might be what neuroscientists need to carry out large multi-scale simulations of the brain. In fact, it will likely be impossible to do so without them, or some computationally equivalent technology.

Sep 5, 2021

Chinese Scientists Say Quantum Radar Could End Stealth Advantage

Posted by in categories: climatology, education, engineering, quantum physics

A new quantum radar technology developed by a team of Chinese researchers would be able to detect stealth planes, the South China Morning Post is reporting.

The news service reports that the radar technology generates a mini electromagnetic storm to detect objects. Professor Zhang Chao and his team at Tsinghua University’s aerospace engineering school, reported their findings in a paper in Journal of Radars.

A quantum radar is different from traditional radars in several ways, according to the paper. While traditional radars have on a fixed or rotating dish, the quantum design features a gun-shaped instrument that accelerates electrons. The electrons pass through a winding tube of a strong magnetic fields, producing what is described as a tornado-shaped microwave vortex.

Sep 5, 2021

Quantum Computers Check Each Other’s Answers in New Error-Correction Approach

Posted by in categories: computing, quantum physics

Quantum computers may be now able to employ a “call-a-friend” tactic to make sure their answers are correct.

In a study published today in Physical Review X, a team of physicists from Vienna, Innsbruck, Oxford, and Singapore designed an error-correction method that lets quantum computers check each other’s answers. While quantum computers are advancing quickly, the devices are still extremely sensitive to outside influences — like heat and cosmic rays — that make them more prone to errors that affect their computations, according to the researchers.

“In order to take full advantage of future quantum computers for critical calculations we need a way to ensure the output is correct, even if we cannot perform the calculation in question by other means,” said Chiara Greganti, a physicist at the University of Vienna.