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Yesterday β€” 29 November 2023Quantum Physics News

Researchers achieve quantum storage of entangled photons at telecom wavelengths in a crystal

29 November 2023 at 16:22
Quantum technologies are currently maturing at a breath-taking pace. These technologies exploit principles of quantum mechanics in suitably engineered systems, with bright prospects such as boosting computational efficiencies or communication security well beyond what is possible with devices based on today's 'classical' technologies.

Quantum tool opens door to uncharted phenomena

29 November 2023 at 16:00
Entanglement is a quantum phenomenon where the properties of two or more particles become interconnected in such a way that one cannot assign a definite state to each individual particle anymore. Rather, we have to consider all particles at once that share a certain state. The entanglement of the particles ultimately determines the properties of a material.

Scientists propose new method to search for deviations from the Standard Model of physics

29 November 2023 at 15:26
In the search for new particles and forces in nature, physicists are on the hunt for behaviors within atoms and molecules that are forbidden by the tried-and-true Standard Model of particle physics. Any deviations from this model could indicate what physicists affectionately refer to as "new physics."

LHCb: Correlations show nuances of the particle birth process

28 November 2023 at 14:37
High-energy ion collisions at the Large Hadron Collider are capable of producing a quark-gluon plasma. But are heavy atomic nuclei really necessary for its formation? And above all: how are secondary particles later born from this plasma? Further clues in the search for answers to these questions are provided by the latest analysis of collisions between protons and protons or ions, observed in the LHCb experiment.

Before yesterdayQuantum Physics News

The formation of an excitonic Mott insulator state in a moirΓ© superlattice

27 November 2023 at 14:10
When a negatively charged electron and a positively charged hole in a pair remain bound together following excitation by light, they produce states known as excitons. These states can influence the optical properties of materials, in turn enabling their use for developing various technologies.

Limits for quantum computers: Perfect clocks are impossible, research finds

26 November 2023 at 10:20
There are different ideas about how quantum computers could be built. But they all have one thing in common: you use a quantum physical systemβ€”for example, individual atomsβ€”and change their state by exposing them to very specific forces for a specific time. However, this means that in order to be able to rely on the quantum computing operation delivering the correct result, you need a clock that is as precise as possible.

Physicists find evidence of exotic charge transport in quantum material

23 November 2023 at 19:00
True to form, a "strange metal" quantum material proved strangely quiet in recent quantum noise experiments at Rice University. Published this week in Science, the measurements of quantum charge fluctuations known as "shot noise" provide the first direct evidence that electricity seems to flow through strange metals in an unusual liquidlike form that cannot be readily explained in terms of quantized packets of charge known as quasiparticles.

A universal framework describing the scrambling of quantum information in open systems

23 November 2023 at 17:00
In recent years, physicists have been trying to better understand how quantum information spreads in systems of interacting particlesβ€”a phenomenon often referred to as "scrambling." Scrambling in closed systems, physical systems that can only exchange energy with degrees of freedom within the system, is a characteristic feature of chaotic many-body quantum dynamics.

Researchers achieve zero-knowledge proof based on device-independent quantum random number beacon

21 November 2023 at 15:17
Zero-knowledge proof (ZKP) is a cryptographic tool that allows for the verification of validity between mutually untrusted parties without disclosing additional information. Non-interactive zero-knowledge proof (NIZKP) is a variant of ZKP with the feature of not requiring multiple information exchanges. Therefore, NIZKP is widely used in the fields of digital signature, blockchain, and identity authentication.

Single ions in nano-sized particles: A new platform for quantum information processing

21 November 2023 at 14:56
Processing quantum information relies on interacting qubitsβ€”the basic building blocks of quantum informationβ€”to perform computational tasks. Scientists are searching for the optimal qubit platform that can perform operations more efficiently, accurately and as fast as possible.

Boomerang-like beams of light: Research makes progress toward observing quantum backflow in two dimensions

20 November 2023 at 17:44
Researchers at the University of Warsaw's Faculty of Physics have superposed two light beams twisted in the clockwise direction to create anti-clockwise twists in the dark regions of the resultant superposition. The results of the research have been published in Optica. This discovery has implications for the study of light-matter interactions and represents a step towards the observation of a peculiar phenomenon known as a quantum backflow.

Q&A: Professor discusses new approaches for the implementation of the quantum internet

17 November 2023 at 17:46
Researchers around the world are working on a network which could connect quantum computers with one another over long distances. Andreas Reiserer, Professor of Quantum Networks at the Technical University of Munich (TUM), explains the challenges which have to be mastered and how atoms captured in crystals can help.