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New research in quantum entanglement could vastly improve disease detection, such as for cancer and Alzheimer’s disease.

A quantum experiment revealed two observers can experience different, coexisting realities.

Our understanding of reality is often shaped by biases—our senses, cultures, and knowledge influence how we see the world. But even science, often regarded as a path to objective truth, may not always offer a single, consistent version of reality. A recent experiment testing a 1961 thought experiment by Nobel Prize winner Eugen Wigner highlights this issue, showing that two versions of reality can coexist in the quantum world.

Wigner’s Friend: The Thought Experiment Wigner’s thought experiment, known as “Wigner’s Friend,” explores a scenario in quantum mechanics where two observers can experience contradictory realities. The setup involves a quantum system, such as a photon with two possible polarizations (horizontal or vertical), that exists in a state of superposition, meaning both states exist at the same time until measured.

Now in Quantum: by Yifan Hong, David T. Stephen, and Aaron J. Friedman https://doi.org/10.22331/q-2024-10-10-1499

Yifan Hong, David T. Stephen, and Aaron J. Friedman, Quantum 8, 1499 (2024). We constrain a broad class of teleportation protocols using insights from locality. In the “standard” teleportation protocols we consider, all outcome-dependent unitaries are Pauli operators conditioned on linear functions of the measurement outcomes. We find that all such protocols involve preparing a “resource state” exhibiting symmetry-protected topological (SPT) order with Abelian protecting symmetry $\mathcal{G}_{k}= (\mathbb{Z}_2 \times \mathbb{Z}_2)^k$. The $k$ logical states are teleported between the edges of the chain by measuring the corresponding $2k$ string order parameters in the bulk and applying outcome-dependent Paulis. Hence, this single class of nontrivial SPT states is both necessary and sufficient for the standard teleportation of $k$ qubits. We illustrate this result with several examples, including the cluster state, variants thereof, and a nonstabilizer hypergraph state.

Discover how qubits, the building blocks of quantum computing, are revolutionizing fields like medicine and cryptography. Learn why they’re the future.

The platform-agnostic algorithm ignores information related to noise in quantum computers to prevent compounding errors.

Research on superconductivity has taken a significant leap with Princeton Universitys exploration of edge supercurrents in topological superconductors like molybdenum telluride.

Initially elusive, these supercurrents have been observed and enhanced through experiments with niobium, leading to intriguing phenomena such as stochastic switching and anti-hysteresis, altering the understanding of electron behavior in superconductors.

Superconductivity and Topological Materials.

Researchers at Freie Universität Berlin, University of Maryland and NIST, Google AI, and Abu Dhabi set out to robustly estimate the free Hamiltonian parameters of bosonic excitations in a superconducting quantum simulator. The protocols they developed, outlined in a paper pre-published on arXiv, could contribute to the realization of highly precise quantum simulations that reach beyond the limits of classical computers.

Before I begin, I would like to state that the topics discussed here in reference to Quantum Mechanics represent my own understanding of the science. These ideas may or may not fall in with those who have achieved accreditation for their own understanding of the subject matter. The observations of the author are derived from extensive study of the science from a variety of materials, including audio and visual lectures. It is my hope that the understanding presented here will offer a medium of sorts for those concerned with preservation of personality.

Now in Quantum: by Antonio deMarti iOlius, Patricio Fuentes, Román Orús, Pedro M. Crespo, and Josu Etxezarreta Martinez https://doi.org/10.22331/q-2024-10-10-1498

Antonio deMarti iOlius¹, Patricio Fuentes², Román Orús^3,4,5, Pedro M. Crespo¹, and Josu Etxezarreta Martinez¹

¹Department of Basic Sciences, Tecnun — University of Navarra, 20,018 San Sebastian, Spain. ² Photonic Inc., Vancouver, British Columbia, Canada. ³ Multiverse Computing, Pio Baroja 37, 20008 San Sebastián, Spain ⁴ Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018 San Sebastián, Spain ⁵ IKERBASQUE, Basque Foundation for Science, Plaza Euskadi 5, 48009 Bilbao, Spain.

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