EPJ D Highlight - A better starting point for exploring entanglement

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Published on 25 February 2020

Updated mathematical techniques which can distinguish between two types of ‘non-Gaussian curve’ could make it easier for researchers to study the nature of quantum entanglement.

Quantum entanglement is perhaps one of the most intriguing phenomena known to physics. It describes how the fates of multiple particles can become entwined, even when separated by vast distances. Importantly, the probability distributions needed to define the quantum states of these particles deviate from the bell-shaped, or ‘Gaussian’ curves which underly many natural processes. Non-Gaussian curves don’t apply to quantum systems alone, however. They can also be composed of mixtures of regular Gaussian curves, producing difficulties for physicists studying quantum entanglement. In new research published in EPJ D, Shao-Hua Xiang and colleagues at Huaihua University in China propose a solution to this problem. They suggest an updated set of equations which allows physicists to easily check whether or not a non-Gaussian state is genuinely quantum.

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EPJ B Highlight - Stimulating resonance with two very different forces

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Published on 25 February 2020

In some specialised oscillators, two driving forces with significantly different frequencies can work together to make the whole system resonate.

Widely studied in many different fields, ‘nonlinear’ systems can display excessively dramatic responses when the forces which cause them to vibrate are changed. Some of these systems are sensitive to changes in the very parameters which define their driving forces, and can be well described using mathematical equations. These ‘parametric’ oscillators have been widely researched in the past, but so far, few studies have investigated how they will respond to multiple driving forces. In new research published in EPJ B, Dhruba Banerjee and colleagues at Jadavpur University in Kolkata explore this case in detail for the first time. They show that some parametric oscillators can be made to resonate when tuned by a high driving frequency to match a separate, far lower frequency.

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Miguel A.F. Sanjuán joins the EPJ Scientific Advisory Committee (SAC)

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Published on 19 February 2020

The Scientific Advisory Committee of EPJ is delighted to welcome Professor Miguel A.F. Sanjuán as the new representative for the Spanish Royal Physics Society.

Miguel A.F. Sanjuán is a professor of Physics at the University Rey Juan Carlos (URJC) in Madrid, Spain. He is the director of the Nonlinear Dynamics, Chaos and Complex Systems research group at the URJC. He is a member of the Spanish Royal Academy of Sciences, foreign member of the Lithuanian Academy of Sciences and member of the Academia Europaea.

He is an internationally renowned expert in Nonlinear Dynamics, Chaos and Complex Systems and currently Editor General of the Spanish Royal Physics Society.

His expertise will be highly appreciated for the review of and advice on the publishing strategy of EPJ. His membership of the committee will support the visibility of EPJ in his community.