entanglement

Visualization of locating the optimal generator on a Bloch sphere. The color represents the QFI for the given generator. CreditSteven Burrows/Holland groupResearchers have revolutionized quantum sensing with an algorithm that simplifies the assessment of Quantum Fisher Information, thereby enhancing the precision and utility of quantum sensors in capturing minute phenomena.Quantum sensors help physicists understand the world better by measuring time passage, gravity fluctuations, and other effects at the tiniest scales.…

A photo of the atomic clock setup complete with the bisecting cavity. CreditJILA/Ye GroupJILA’s breakthrough in optical atomic clocks uses quantum entanglement to surpass fundamental precision limits, setting a new standard in timekeeping and opening avenues for scientific discovery.Historically, JILA (a joint institute established by the National Institute of Standards and Technology (NIST) and the University of Colorado Boulder) has been a world leader in precision timekeeping using optical atomic clocks. These clocks…

Researchers from São Paulo State University have developed a new method to quantify quantum entanglement, challenging traditional theories and potentially advancing quantum computing. This study emphasizes the importance of entanglement in enhancing processing power and offers insights into the limitations of classical computing, highlighting the rapid progress of quantum technology led by companies like Google and IBM.Entanglement is a fundamental principle in quantum physics and a critical factor for the effectiveness…

Scientists have demonstrated that protons are maximally entangled at a quantum level in collisions with high-energy photons, extending these findings to include pomeron-involved scenarios. Credit: SciTechDaily.comWhen a high-energy photon strikes a proton, secondary particles diverge in a way that indicates that the inside of the proton is maximally entangled. An international team of physicists with the participation of the Institute of Nuclear Physics of the Polish Academy of Sciences in Cracow has just demonstrated…

Two groundbreaking studies have developed a method for controlling quantum entanglement in molecules, specifically calcium fluoride (CaF), using an optical tweezer array to create highly entangled Bell states. This advancement opens new avenues in quantum computing and sensing technologies.Advancements in quantum entanglement with calcium fluoride molecules pave the way for new developments in quantum computing and sensing, utilizing controlled Bell state creation.Quantum Entanglement in MoleculesQuantum entanglement with…

The group of Prof. Xiao-Song Ma at Nanjing University has demonstrated the faithful storage of quantum-entangled photons at telecom wavelengths for a record-long time of almost 2 μs. Key elements for this achievement were the combination of efficient generation of entangled photons (blue spheres) with an integrated microring resonator (bottom right) and long storage time in an ensemble of 167Er3+ ions doped in a Y2SiO5 crystal (cube) using atomic frequency combs (lower-left). Credit: Group of Prof. Xiao-Song Ma at…

Artistic rendering of the experimental device with the beam optical photons (red) entering and leaving the electro-optic crystal and resonating within its circular portion as well as the generated microwave photons (blue) leaving the device. Credit: Eli Krantz, Krantz NanoArtFor the very first time, researchers at ISTA entangled microwave and optical photons.Quantum computing holds the potential to tackle complex issues in fields like material science and cryptography, problems that will remain out of reach even for the…

A group of Meta shareholders, which includes activist Mari Mennel-Bell, is seeking action from the social media company on allegations of its “political entanglement and content management biases” in India. The shareholders’ resolution will come up for voting at Meta’s annual shareholder and board meeting scheduled for Tuesday, May 31, according to people in the know of the matter.Global non-profit advocacy and proxy advisory firm SumOfUs, now known as Eko, is the proponent of Mennel-Bell’s resolution, which was placed…

Researchers at Caltech have utilized quantum entanglement to double the resolution of light microscopes. The new technique, called quantum microscopy by coincidence, involves the entanglement of photons, which act as biphotons with double the momentum of a single photon. This results in a shorter wavelength, allowing the microscope to achieve greater resolution without damaging the specimens being observed, such as living cells. The team built an optical apparatus that used a special crystal to convert photons into…

Quantum entanglement is a phenomenon in quantum mechanics where two or more particles can become correlated in such a way that the state of one particle is dependent on the state of the other particle, even when separated by great distances. This means that a change in the state of one particle can instantaneously affect the state of the other particle, regardless of the distance between them. This seemingly paradoxical and counterintuitive behavior has been confirmed in numerous experiments and is considered one of the…