科学与环境
Quantum 'birthmarks' hold lasting traces of a system's past
来源: Phys.org - latest science and technology news stories · 发布于
Some classical physical systems can explore many configurations over time until their long-term behavior no longer reveals their starting conditions. The sampling of available configurations according to the appropriate statistical distribution is a property called ergodicity.
Some classical physical systems can explore many configurations over time until their long-term behavior no longer reveals their starting conditions. The sampling of available configurations according to the appropriate statistical distribution is a property called ergodicity.
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New stability rules distinguish quantum phases of matter that an older method wrongly groups together
Most of us recognize basic phases of matter and their properties: solids maintain their shape, liquids flow freely with constant volume, and gases expand to fill their container. Quantum phases, on the other hand, are much harder to categorize, overturning traditional notions of
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Why some young ants start hunting and caring for others early
Some insects, including honeybees and ants, live in highly organized colonies where individuals take on specific roles. In many ant societies, young adult workers typically care for developing young inside the nest before beginning to forage, or search for food, outside it. Some
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Ultraviolet laser pulses engineer diamond defects selectively, leaving quantum qubits intact
When we think about a diamond, we often think about a material whose value comes from its perfection. In my research, however, I am interested in something almost opposite: the tiny imperfections inside diamonds. These atomic-scale defects can give diamonds new optical and electr
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Against the odds: Why some ecosystems thrive
From coral reefs in Papua New Guinea to chimpanzees in West Africa, grizzly bears in Canada and albatross colonies off Tasmania, some ecosystems are thriving despite climate change, habitat loss and other environmental pressures.
Phys.org - latest science and technology news stories ·
Hybrid quantum computer observes foundational quantum effect in a new setting
Physicists in the Department of Physics at the University of Oxford have used a hybrid quantum computer, made up of qubits and quantum oscillators, to observe the Aharonov–Bohm effect in a quantum simulation. The effect is a quantum phenomenon in which a particle can acquire a me
Phys.org - latest science and technology news stories ·