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    Schrödinger’s Cat with 20 Qubits

    August 15, 2019, Categories  Physics, Technology/Electronics

    Experimental sketch: Rubidium atoms are captured by laser beams (red). Another additional laser (blue) excites about half of the atoms to such an extent that their atomic shells merge with the adjacent atoms.
    Copyright: Forschungszentrum Jülich / Tobias Schlößer

    New record with entangled quantum bits. Dead or alive, left-spinning or right-spinning – in the quantum world particles such as the famous analogy of Schrödinger’s cat can be all these things at the same time. An international team, together with experts from Forschungszentrum Jülich, have now succeeded in transforming 20 entangled quantum bits into such a state of superposition. The generation of such atomic Schrödinger cat states is regarded as an important step in the development of quantum computers.

    Since the ea...

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    Can Entangled qubits be used to Probe Black Holes?

    March 7, 2019, Categories  Physics, Astronomy/Space

    This is a schematic of the black hole information paradox. Alice drops a qubit into a black hole and asks whether Bob can reconstruct the qubit using only the outgoing Hawking radiation.
    Credit: Norman Yao, UC Berkeley

    Demonstration of scrambling in quantum computer shows how to resurrect ‘lost’ information. Physicists have used a seven-qubit quantum computer to simulate the scrambling of information inside a black hole, heralding a future in which entangled quantum bits might be used to probe the mysterious interiors of these bizarre objects.

    Scrambling is what happens when matter disappears inside a black hole...

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