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It does not say how much he was taking. It was my understanding people can take under 10 mg per week and get no side effects.


In an ironic twist of fate, biohacker Bryan Johnson discovers that the drug he used to freeze time was possibly fast-forwarding it.

Symmetry plays a crucial role in understanding fundamental phenomena such as conservation laws, the classification of phases of matter, and their transitions. Recently, researchers have been exploring ways to manipulate symmetries in quantum many-body systems with time-dependent driving protocols and, in particular, engineering new symmetries that do not naturally occur. This significantly enriches the toolbox for quantum simulation and computation, and has led to many exciting discoveries of nonequilibrium phases such as discrete time crystals. However, controlling multiple symmetries—especially in a simple and experimentally friendly way—has remained a challenge. In this work, we propose a novel method to engineer hierarchical symmetries by time-dependent protocols.

By carefully controlling how symmetry-indicating observables evolve over time, we show how to create a sequence of symmetries that emerge one after another, each with distinct properties. Our method relies on a recursive construction that hierarchically minimizes the effects of symmetry-breaking processes. This leads to a corresponding sequence of prethermal steady states with controllable lifetimes, each exhibiting a lower symmetry than the preceding one. We illustrate this protocol with several examples, demonstrating how different types of order can emerge through hierarchical symmetry breaking.

This toolbox of hierarchical symmetries opens a new path to stabilizing quantum states and controlling unwanted symmetry-breaking effects, which can be particularly useful in quantum computing and quantum simulation. The construction applies to classical and quantum, fermionic and bosonic, interacting and noninteracting systems. The underlying mechanism generalizes state-of-the-art dynamical decoupling techniques and is implementable on present-day quantum simulation platforms.

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That was quite the scare for one US woman who was told she needed to have hers removed, despite having had them removed 40 years earlier.

Katy Golden told CNN: “I knew that there was some sort of little flap or something that’s been there for years, but I didn’t realize what it was. I just thought, ‘I’m not a doctor myself. I don’t know much about mouth structure. That’s just how it is’.”

A $7 billion all-electric light rail project is underway in the Capital City. The Austin Light Rail now has a team in place to build the city’s first light rail system, set to shakeup the city’s public transportation in the near future.

Last month, the Austin Transit Partnership selected AECOM, a Dallas-based infrastructure consulting firm, to bring the first phase of the approximately 10-mile light rail to life in Austin, according to a release. Now AECOM is preparing to offer more updates to public on the project’s progress as the organization continues to implement the plan.