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Ash @atlasrho.com · 14/01/2025

The research was conducted at CCNY’s Harlem Center for Quantum Materials and received support from the National Science Foundation. The findings were published in the journal Nature Communications. phys.org/news/2025-01...

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Ash @atlasrho.com · 14/01/2025

By using hydrogen or other light elements to adjust these materials, new platforms become available for exploring and utilizing topological phases with remarkable large-scale behaviors. This development opens the door to potentially transformative applications in future #quantum devices.

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Ash @atlasrho.com · 14/01/2025

This means the material’s electrical charges respond differently when an in-plane magnetic field is rotated in different directions, acting as a ‘chiral switch’ that can be tuned with low magnetic fields.

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Ash @atlasrho.com · 14/01/2025

One outcome of this technique is the generation of low-dissipation currents. They’re more efficient losing less energy as heat. The modified Weyl states exhibit a doubled Curie temperature—the point at which a material loses its permanent magnetic properties—and a strong angular transport chirality.

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Ash @atlasrho.com · 14/01/2025

Such control could pave the way for new quantum devices that utilize these unique properties for advanced chiral spintronics—technology that exploits electron spin and its associated magnetic moment—and potentially for robust quantum computing systems.

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Ash @atlasrho.com · 14/01/2025

By introducing hydrogen ions (H+) into the magnetic material MnSb₂Te₄, the researchers found they could adjust and enhance the chirality of electronic transport. This process involves reshaping energy features within the material, known as Weyl nodes, allowing for on-demand tuning.

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Ash @atlasrho.com · 14/01/2025

They developed a method to manipulate the electronic properties of a magnetic Weyl semimetal—a type of material where electrons behave like massless particles, Weyl fermions. These fermions have a unique characteristic called chirality, where spin & momentum are linked in a specific “handedness.”

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Ash @atlasrho.com · 14/01/2025

A team of physicists at The City College of New York, led by Professor Lia Krusin-Elbaum, has made a significant advancement in the field of quantum materials.

“Rendering of the tilting of relativistic Dirac cones in the bulk electronic bands of a quasi-two-dimensional (2D) magnetic topological semimetal achieved with insertion of hydrogen that generates tunable low-dissipation chiral charge currents.” Credit: the Krusin Lab

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Ash @atlasrho.com · 08/01/2025

This #research demonstrates that deep learning, particularly CNNs, can effectively learn and predict the complexity of #quantum states across various conditions, providing a novel approach to studying quantum complexity. arxiv.org/html/2501.02...

arxiv.org

1 Introduction

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Ash @atlasrho.com · 08/01/2025

• Time Variable Irrelevance: The study suggests that the specific time at which a quantum state is analyzed becomes less relevant, especially at late times, reinforcing that Krylov spread complexity captures essential features of the quantum state.

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Ash @atlasrho.com · 08/01/2025

• Temperature Sensitivity: The algorithm effectively distinguishes features of TFD states at different temperatures, indicating its sensitivity to temperature-dependent characteristics of quantum states.

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Ash @atlasrho.com · 08/01/2025

• Basis Dependence: The performance of the deep learning algorithm varies significantly with the choice of basis. It performs well in the energy eigenbasis and the Krylov basis but poorly in the original basis of the random Hamiltonian.

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Ash @atlasrho.com · 08/01/2025

Key findings include: • Effective Learning Across Timescales: The CNN successfully learns the complexity of quantum states not only at early times, where structures are more apparent, but also at late times, where states appear nearly random.

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Ash @atlasrho.com · 08/01/2025

These are special quantum states related to black holes in theoretical physics. They employ a convolutional neural network (CNN) to learn and predict the Krylov spread complexity of these quantum states over time.

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Ash @atlasrho.com · 08/01/2025

Krylov spread complexity measures how a quantum state evolves and spreads within a subspace during its time evolution. They use random Hamiltonians from the Gaussian unitary ensemble and start with thermofield double (TFD) states.

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Ash @atlasrho.com · 08/01/2025

The paper titled “Machine Learns Quantum Complexity?” explores how deep learning techniques can be applied to understand quantum complexity, specifically focusing on Krylov spread complexity in quantum systems.

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Ash @atlasrho.com · 03/01/2025

In essence, the UK’s development of its first quantum clock signifies a monumental leap in timekeeping, with the potential to transform various sectors and enhance national security. phys.org/news/2025-01...

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Ash @atlasrho.com · 03/01/2025

The global race in quantum technology is heating up, with significant investments from countries like the US and China. The UK’s foray into quantum clocks not only positions it at the forefront of this technological frontier but also opens new avenues in research fields such as quantum science.

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Ash @atlasrho.com · 03/01/2025

The Defense Science and Technology Laboratory aims to deploy this technology within the next five years, with future research focusing on miniaturization for use in military vehicles and aircraft.

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Ash @atlasrho.com · 03/01/2025

The implications of such precision are vast. For the military, it means enhanced intelligence and reconnaissance capabilities, reducing reliance on GPS technology that adversaries could disrupt. It could revolutionize industries, bolster the science sector, and support high-skilled jobs.

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Ash @atlasrho.com · 03/01/2025

Unlike traditional clocks, which might drift by seconds over centuries, this quantum marvel uses the principles of quantum mechanics to measure energy fluctuations within atoms, achieving unprecedented accuracy.

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Ash @atlasrho.com · 03/01/2025

In a top-secret UK laboratory, scientists are developing the nation’s first quantum clock—a timekeeping device so precise it would lose less than one second over billions of years.

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Ash @atlasrho.com · 31/12/2024

This research represents a significant step toward practical thermotronic systems that manage heat at the #quantum level, potentially transforming energy efficiency and heat management in future technologies. phys.org/news/2024-12...

phys.org

Advancing unidirectional heat flow: The next era of quantum thermal diodes

Heat management at the nanoscale has long been a cornerstone of advanced technological applications, ranging from high-performance electronics to quantum computing. Addressing this critical challenge,...

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Ash @atlasrho.com · 31/12/2024

This advancement could lead to improved cooling methods for electronics, better energy harvesting from waste heat, and more effective thermal management in various applications.

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Ash @atlasrho.com · 31/12/2024

The researchers’ work demonstrates that using higher-dimensional quantum systems, like the qubit-qutrit combination, can enhance the efficiency and scalability of thermal diodes.

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Ash @atlasrho.com · 31/12/2024

Such control over heat flow is crucial for managing heat in advanced technologies, including high-performance electronics and quantum computing systems.

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Ash @atlasrho.com · 31/12/2024

It combines a qubit (a quantum system with two levels) and a qutrit (a system with three levels) to create an asymmetric energy structure. It allows heat to move preferentially in one direction, depending on the temperature difference, while preventing it from moving in the opposite direction.

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Ash @atlasrho.com · 31/12/2024

Researchers at Monash University’s Advanced Computing and Simulation Laboratory have developed a quantum thermal diode that controls heat flow in one direction, similar to how an electrical diode controls electric current.

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Ash @atlasrho.com · 29/12/2024

Americans are being laid off in mass to hire cheaper labor. This is an actual problem. Don’t know how hard it is to compete in STEM these days? Finding a wage worth a damn is like a needle in a haystack. If an economy needs to run off “slave” labor to survive is it running well?

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Ash @atlasrho.com · 14/12/2024

In summary, Google’s Willow chip showcases remarkable progress in quantum computing but does not currently endanger modern cryptographic protocols. The transition to quantum-resistant encryption remains a proactive measure for future-proofing data security. www.theverge.com/2024/12/12/2...

theverge.com

Google says its breakthrough quantum chip can’t break modern cryptography

Come learn what a CRQC is — even if Google doesn’t have one yet.

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Ash @atlasrho.com · 14/12/2024

Organizations are encouraged to stay informed about advancements in both quantum computing and post-quantum cryptography to ensure the continued security of their information systems.

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Ash @atlasrho.com · 14/12/2024

While Willow marks a significant step forward in quantum computing, it does not alter the current timeline regarding the potential threat to cryptographic systems. The development of quantum-resistant encryption algorithms is ongoing to safeguard data against future quantum attacks.

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Ash @atlasrho.com · 14/12/2024

However, Google’s Willow chip, with its 105 qubits, is not yet capable of breaking modern cryptography. Estimates suggest that a quantum computer would need around 4 million physical qubits to break RSA encryption, a milestone that is at least a decade away.

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Ash @atlasrho.com · 14/12/2024

Quantum computers, in theory, could solve these problems more efficiently using algorithms like Shor’s algorithm, potentially compromising current cryptographic systems.

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Ash @atlasrho.com · 14/12/2024

Implications for Cryptography: Modern encryption methods, such as RSA (Rivest-Shamir-Adleman), rely on the computational difficulty of factoring large numbers—a task that classical computers find infeasible within a reasonable timeframe.

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Ash @atlasrho.com · 14/12/2024

• Improved Error Correction: The chip demonstrates exponential error reduction as more qubits are added, achieving a milestone in quantum error correction that has been pursued for nearly three decades.

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Ash @atlasrho.com · 14/12/2024

Key Features of the Willow Quantum Chip: • Enhanced Computational Power: Willow can perform certain computations in under five minutes that would take the fastest supercomputers approximately 10 septillion years—a duration vastly exceeding the age of the universe.

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Ash @atlasrho.com · 14/12/2024

#Google has unveiled its latest #quantum computing chip, named Willow, which represents a significant advancement in quantum technology. Despite its impressive capabilities, Willow does not currently pose a threat to modern cryptographic systems.

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Ash @atlasrho.com · 13/12/2024

#NASA astronauts Anne McClain, Nichole Ayers, Russia's Kirill Peskov and Japan's Takuya Onishi, SpaceX Crew-10, launch to the ISS in Feb 2025 or later.

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Ash @atlasrho.com · 13/12/2024

In summary, this breakthrough demonstrates a novel method for controlling #quantumstates in a previously unexplored energy range, paving the way for significant advancements in #quantumphysics and related technologies. phys.org/news/2024-12...

phys.org

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Ash @atlasrho.com · 13/12/2024

Potential Chemical Reaction Control: Developing methods to study or even manipulate chemical reactions with atomic precision, which could revolutionize fields like materials science and chemistry.

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Ash @atlasrho.com · 13/12/2024

• Enhanced Experimental Precision: Improving the efficiency and selectivity of experiments conducted with free electron lasers. • Advanced Quantum System Studies: Gaining insights into fundamental quantum systems that are inaccessible with visible light.

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Ash @atlasrho.com · 13/12/2024

Significance of the Research: This work marks the first direct control of transient quantum states in helium atoms using EUV light. The developed technique opens new avenues for:

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Ash @atlasrho.com · 13/12/2024

By manipulating these components, they could disperse or contract the pulse, allowing precise control over the interaction between the light and the electrons.

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Ash @atlasrho.com · 13/12/2024

Pulse Shaping Technique: To control the dressed states, researchers employed a laser pulse-shaping method that adjusts the timing of different color components within the laser pulse.

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Ash @atlasrho.com · 13/12/2024

Approach: Extreme Ultraviolet Light Pulses: The team utilized the FERMI free electron laser in Trieste, Italy, to produce highly intense EUV light pulses with wavelengths shorter than 100 nanometers. This short wavelength is crucial for interacting with the tightly bound electrons in helium atoms.

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Ash @atlasrho.com · 13/12/2024

These are referred to as “dressed states.” The interaction modifies the electron’s energy levels, effectively “dressing” them with photon characteristics.

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Ash @atlasrho.com · 13/12/2024

Understanding Dressed States: In #quantummechanics, electrons bound to an atom occupy discrete energy levels. When subjected to a strong light field, such as an intense laser, these energy levels can shift, leading to the formation of hybrid states where electrons and photons are coupled.

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Ash @atlasrho.com · 13/12/2024

An international team of scientists, led by Dr. Lukas Bruder from the University of Freiburg, has successfully generated and controlled hybrid electron-photon #quantum states—known as “dressed states”—in helium atoms using intense extreme ultraviolet (EUV) light pulses.

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