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Category: quantum physics

There is no “outside.” No other system. The universe is not on a computer. It is the computer. It is the thing performing the computation. It doesn’t need anyone watching it. It doesn’t need a server farm or a control panel. It simply is what it is: a system that processes information according to its own rules.
In other words, when we talk about the universe as a quantum computer, we’re not saying it’s pretending to be real. We’re saying this is what real is.

1:19 Reality as Code.
8:35 What Is a Quantum Computer, Anyway?
13:37 Evidence and Models That Support the Quantum Universe Idea.
20:04 What Would It Mean If the Universe Is a Quantum Computer?
26:14 Could We Simulate the Universe from Within It?
32:37 The Dark Implications.
39:53 Is This the Best Description We’ll Ever Get?

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Physicists have successfully played a mind-bending “quantum game” using a real-world quantum computer, in which lasers shuffle around ions on a chip to explore the strange behavior of qubits. By creating a special, knotted structure of entangled particles, the team demonstrated that today’s quant

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Scientists have discovered a new four-body quasi-particle, the quadruplon, in a 2D semiconductor. Using laser experiments and advanced theory, they identified unique spectral features unexplained by existing models, confirming the quadruplon’s existence. A central goal of physics is to understand

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Determining the passage of time in our world of ticking clocks and oscillating pendulums is a simple case of counting the seconds between ‘then’ and ‘now’

Down at the quantum scale of buzzing electrons, however, ‘then’ can’t always be anticipated. Worse still, ‘now’ often blurs into a haze of vagueness. A stopwatch simply isn’t going to work for some scenarios.

A potential solution could be found in the very shape of the quantum fog itself, according to a 2022 study by researchers from Uppsala University in Sweden.

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With applications ranging from experimental physics to quantum field exploration, these high-energy lasers are more than scientific curiosities — they’re becoming symbols of technological ambition and geopolitical strength.

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A research team at HZB has developed a clever technique to read quantum spin states in diamonds using electrical signals instead of light. This breakthrough could dramatically simplify quantum sensors and computing hardware.

Diamonds that contain specific optically active defects, known as color centers, can serve as highly sensitive sensors or as qubits for quantum computers, with quantum information stored in their electron spin states. Traditionally, reading these spin states requires optical methods, which are often complex and difficult to implement. Now, researchers at HZB have developed a more streamlined approach: using photovoltage to detect the spin states of individual defects. This method could pave the way for much smaller and more compact quantum sensors.

Harnessing Defects for Spin States.

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Researchers in China have achieved a major leap in quantum photonics by generating a massive 60-mode entangled cluster state directly on a chip using optical microresonators.

By leveraging a deterministic, continuous-variable approach and a multiple-laser pump technique, they overcame traditional limitations in scalability. The team confirmed high-quality entanglement using advanced detection methods, paving the way for powerful quantum technologies like chip-based computers, secure communications, and cutting-edge sensors.

Breakthrough in On-Chip Quantum Entanglement.

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