Memory, or the ability to store information in a readily accessible way, is an essential operation in computers and human brains. A key difference is that while brain information processing involves performing computations directly on stored data, computers shuttle data back and forth between a memory unit and a central processing unit (CPU). This inefficient separation (the von Neumann bottleneck) contributes to the rising energy cost of computers.
Year 2023 đđ
Famed musician and former Elon Musk boo Claire âGrimesâ Boucher wanted a brain-computer interface (BCI) for her birthday â and one of Neuralinkâs apparent competitors was happy to comply.
After Grimes tweeted about getting a ânon invasive brain computer interfaceâ for her birthday, AJ Keller, the CEO of the startup Neurosity, confirmed in an interview with Insider that his firm had indeed made a custom brain gadget for the âKill V. Maimâ singer.
While a tech company sending a nerdy sci-fi celebrity fan a gadget wouldnât really be news on its own, the fact that Grimes is the mother to two of Muskâs children and is seemingly on pretty acrimonious terms with the Canadian-South African billionaire, who owns perhaps the most famous and one of the most controversial BCI companies in the world, makes this story incredibly juicy.
Researchers at Osaka Universityâs Institute of Scientific and Industrial Research (SANKEN) used the shortcuts to the adiabaticity (STA) method to greatly speed-up the adiabatic evolution of spin qubits. The spin flip fidelity after pulse optimization can be as high as 97.8% in GaAs quantum dots. This work may be applicable to other adiabatic passage and will be useful for fast and high-fidelity quantum control.
A quantum computer uses the superposition of â0â and â1â states to perform information processing, which is completely different from classical computing, thus allowing for the solution of certain problems at a much faster rate.
High-fidelity quantum state operation in large enough programmable qubit spaces is required to achieve the âquantum advantage.â The conventional method for changing quantum states uses pulse control, which is sensitive to noises and control errors.
Posted in computing, quantum physics
Fermatâs last theorem puzzled mathematicians for centuries until it was finally proven in 1993. Now, researchers want to create a version of the proof that can be formally checked by a computer for any errors in logic.
By Alex Wilkins
Yin et al. realize a FeFET based compute-in-memory annealer as an efficient combinatorial optimization solver through algorithm-hardware co-design with a FeFET chip, matrix lossless compression, and a multi-epoch simulated annealing algorithm.
Authors: Tianyi Liang, Dong Wu, Xiaochuan Ning, Lianqiang Shan, Zongqiang Yuan, Hongbo Cai, Zhengmao Sheng, and Xiantu He. Discover more in PRE:
The National Ignition Facility has recently achieved successful burning plasma and ignition using the inertial confinement fusion (ICF) approach. However, there are still many fundamental physics phenomena that are not well understood, including the kinetic processes in the hohlraum. Shan et al. [Phys. Rev. Lett. 120, 195001 (2018)] utilized the energy spectra of neutrons to investigate the kinetic colliding plasma in a hohlraum of indirect drive ICF. However, due to the typical large spatial-temporal scales, this experiment could not be well simulated by using available codes at that time. Utilizing our advanced high-order implicit PIC code, LAPINS, we were able to successfully reproduce the experiment on a large scale of both spatial and temporal dimensions, in which the original computational scale was increased by approximately seven to eight orders of magnitude.
A soft brain implant that unfurls under the skull could give doctors a less invasive way to monitor patientsâ brain activity â and maybe allow people to directly control technology with their minds.
The challenge: Placing an electrode array on the surface of the brain allows scientists to see neural activity in far more detail than is possible with electrodes outside of the skull.
Known as âelectrocorticography,â this technology was initially developed to treat people with epilepsy, but itâs also been used in research for other types of neurological disorders and in the development of brain-computer interfaces.
Congratulations, your captain has retired and left you in charge of his galactic shipping business! Now itâs time to make some upgrades as you embark on a journey to reconstruct a quantum computer developed by an ancient race.
Entanglion is a cooperative board game designed for two players. Learn about quantum computing as you work together with your teammate to navigate the three galaxies of the quantum universe, avoid detection by the defense mechanisms left behind by the ancients, and rebuild the quantum computer.
Think youâre up for the challenge?
An MIT team precisely controlled an ultrathin magnet at room temperature, which could enable faster, more efficient processors and computer memories.
Experimental computer memories and processors built from magnetic materials use far less energy than traditional silicon-based devices. Two-dimensional magnetic materials, composed of layers that are only a few atoms thick, have incredible properties that could allow magnetic-based devices to achieve unprecedented speed, efficiency, and scalability.
While many hurdles must be overcome until these so-called van der Waals magnetic materials can be integrated into functioning computers, MIT researchers took an important step in this direction by demonstrating precise control of a van der Waals magnet at room temperature.
