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Oct 20, 2024

Who (or what) Possesses Consciousness? From Koko to AI

Posted by in categories: quantum physics, robotics/AI

What is consciousness, and is it really inherent only to humans? In this video, we explore whether consciousness is not only inherent in humans, but also in animals, artificial intelligence, and even the universe itself. We dive into the complex concepts of panpsychism and quantum consciousness, looking at Roger Penrose and Stuart Hameroff’s Orch-OR project, which claims that quantum processes in microtubules may underlie consciousness. We will analyze Giulio Tononi’s Integral Information Theory, which proposes to quantify the level of consciousness in any system.

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Oct 19, 2024

In a global first, quantum computers crack RSA and AES data encryption

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

A team of Chinese researchers, led by Wang Chao from Shanghai University, has demonstrated that D-Wave’s quantum annealing computers can crack encryption methods that safeguard sensitive global data.

This breakthrough, published in the Chinese Journal of Computers, emphasizes that quantum machines are closer than expected to threatening widely used cryptographic systems, including RSA and Advanced Encryption Standard (AES).

The research team’s experiments focused on leveraging D-Wave’s quantum technology to solve cryptographic problems. In their paper, titled “Quantum Annealing Public Key Cryptographic Attack Algorithm Based on D-Wave Advantage,” the researchers explained how quantum annealing could transform cryptographic attacks into combinatorial optimization problems, making them more manageable for quantum systems.

Oct 19, 2024

Assessing quantum advantage for ground state problems

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

How do we assess quantum advantage when exact classical solutions are not available?

A quantum advantage is a demonstration of a solution for a problem for which a quantum computer can provide a demonstrable improvement over any classical method and classical resources in terms of accuracy, runtime…


Today, algorithms designed to solve this problem mostly rely on what we call variational methods, which are algorithms guaranteed to output an energy for a target system which cannot be lower than the exact solution — or the deepest valley — up to statistical uncertainties. An ideal quality metric for the ground state problem would not only allow the user to benchmark different methods against the same problem, but also different target problems when tackled by the same method.

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Oct 19, 2024

Researchers in Taiwan develop the world’s smallest quantum computer

Posted by in categories: computing, quantum physics

A research team led by National Tsing Hua University Department of Physics and Center for Quantum Science and Technology professor Chuu Chih-sung (褚志崧) has developed Taiwan’s first and the world’s smallest quantum computer, using a single photon, the university said yesterday.

Chuu said in the…


Bringing taiwan to the world and the world to taiwan.

Oct 17, 2024

Quantum Computing with a Twist

Posted by in categories: computing, quantum physics

The prediction that twisted semiconductor bilayers can host so-called non-Abelian states without a magnetic field holds promise for fault-tolerant quantum computing.

Oct 17, 2024

New benchmark helps solve the hardest quantum problems

Posted by in categories: particle physics, quantum physics

From subatomic particles to complex molecules, quantum systems hold the key to understanding how the universe works. But there’s a catch: when you try to model these systems, that complexity quickly spirals out of control—just imagine trying to predict the behavior of a massive crowd of people where everyone is constantly influencing everyone else. Turn those people into quantum particles, and you are now facing a “quantum many-body problem.”

Oct 17, 2024

Harnessing diamond imperfections opens a new frontier in quantum sensor development

Posted by in categories: biological, quantum physics

Quantum defects have the potential to act as ultra-sensitive sensors that could offer new kinds of navigation or biological sensor technology.

Oct 17, 2024

Quantum research breakthrough uses synthetic dimensions to efficiently process quantum information

Posted by in categories: innovation, quantum physics

A new study opens the door to cutting-edge solutions that could contribute to the realization of a system capable of processing quantum information in a simple yet powerful way.

Oct 17, 2024

Novel superconducting flux qubit can operate without being surrounded by a magnetic field

Posted by in categories: computing, quantum physics

A team of computer engineers from the National Institute of Information and Communications Technology, NTT Corporation and Nagoya University have developed what they claim is the world’s first superconducting flux qubit that can operate without the need for a surrounding magnetic field.

Oct 17, 2024

Non-Abelian Transport Distinguishes Three Usually Equivalent Notions of Entropy Production

Posted by in categories: particle physics, quantum physics

Twesh Upadhyaya, William F. Braasch, Jr., Gabriel T. Landi, and Nicole Yunger Halpern PRX Quantum 5, 030355 – Published 23 September 2024 https://journals.aps.org/prxquantum/abstract/10.1103/PRXQuantum.5.


As an ice cube melts in water, the heat exchange d by the two produces disorder. Imagine measuring the heat flow while the ice melts in each of many trials. From the measurement results, one can compute the disorder generated in each trial—the stochastic entropy production (SEP). The SEP is well understood in the case of two classical systems interacting; there is one widely accepted SEP definition that can be expressed equivalently via three formulas. But the situation is far murkier for quantum analogues, such as two atoms exchanging components of spin.

Generalizing the three SEP formulas to accommodate quantum systems, we prove that quantum effects render the three SEP formulas inequivalent. Each formula reasonably quantifies entropy production and highlights a different aspect of the underlying physics. The inequivalence of the formulas stems from the inability to simultaneously measure the exchange d quantities of the quantum systems, i.e., the uncertainty principle. This quantumness leads to negative and even nonreal entropy production. Though unusual, these entropy values herald notable physical phenomena. A negative entropy production signals superposition in the thermal initial states of the quantum systems. An imaginary entropy production witnesses contextuality, a precise notion of nonclassicality.

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