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Archive for the ‘time travel’ category: Page 2

Jun 29, 2024

Measuring Qubits with “Time Travel” Protocol

Posted by in categories: quantum physics, time travel

Quantum sensing can outperform classical sensing by placing the sensor in an initial state that optimally measures the target. However, choosing this optimal state requires having some preknowledge, such as knowing the orientation of a magnetic field in order to measure its strength. A new experiment overcomes this limitation using two entangled quantum bits (qubits), which are manipulated in a way that is equivalent to a qubit traveling back in time [1]. Through this “time travel,” the qubits can be placed in an optimal state without any preknowledge.

“Our work addresses a specific kind of problem that plagues many sensing setups: you have to know which direction to point the sensor,” explains Kater Murch from Washington University in St. Louis. When measuring a magnetic field with a spin qubit, for example, the spin’s rotation will return information about the field strength only if you point it in the optimal direction. Point it in a nonoptimal direction and you’ll get zero information about the field, wasting the measurement.

Murch and his colleagues have devised a protocol in which the probe qubit is entangled with a second qubit, called the ancilla. Following previous work, they show that the entanglement is mathematically equivalent to the ancilla traveling back in time to place the probe in an optimal state [2]. They further show that measuring the ancilla and the probe in a particular sequence can recover information about the field strength in all cases—so no measurement data are wasted as they can be in other protocols. The researchers foresee using this entanglement scheme in situations where a field—or another observable—is changing over time.

Jun 26, 2024

The Strange Case of Quantum Time Loops And Testing Backward Time Travel

Posted by in categories: quantum physics, time travel

An exploration of The Strange Case of Quantum Time Loops And Testing Backward Time Travel. My Patreon Page: https://www.patreon.com/johnmichaelgodierMy Event H…

Jun 26, 2024

The mathematician who worked out how to time travel

Posted by in categories: mathematics, time travel

Mathematics suggested that time travel is physically possible – and Kurt Gödel proved it. Mathematician Karl Sigmund explains how the polymath did it.

By Karl Sigmund

May 30, 2024

Quantum time travel: The experiment to ‘send a particle into the past’

Posted by in categories: particle physics, quantum physics, time travel

Time loops have long been the stuff of science fiction. Now, using the rules of quantum mechanics, we have a way to effectively transport a particle back in time – here’s how.

By Miriam Frankel

May 28, 2024

Are the percentages of dark matter and dark energy stable?

Posted by in categories: cosmology, physics, time travel

Are dark matter and dark energy stable and constant? Since we don’t understand their true physical nature, we can’t be sure. But astronomers can see if they vary depending on which direction in space they look. This is a test of whether the universe is lopsided or the same everywhere (the physics term for this is isotropic). It turns out that the amount of dark matter surrounding galaxies is the same in every direction, and the strength of dark energy is also the same in every direction.

To see whether the influence of dark matter and dark energy has changed over cosmic time, astronomers look deep into space. Distant light is old light, so telescopes act as time machines, probing billions of years into the past. By measuring the redshift and brightness of distant objects, astronomers map out the expansion history of the universe. Dark matter dominated for most of that history since the Big Bang. That’s because when the universe was smaller, the gravity exerted by dark matter was stronger, while the force exerted by dark energy has stayed the same. Now is the only time in the entire history of the universe when the two entities’ influences are about equal. In the future, the effects of dark energy will increasingly dominate, and the universe will accelerate forever.

May 25, 2024

What If We Accessed The 10th Dimension?

Posted by in categories: augmented reality, bioengineering, business, genetics, robotics/AI, time travel, transhumanism

This video explores the 4th to the 10th dimensions of time. Watch this next video about the 10 stages of AI: • The 10 Stages of Artificial Intelligence.
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May 15, 2024

How Does Multiverse Theory Relate to Time Travel?

Posted by in categories: cosmology, physics, time travel

The theoretical physics and paradoxes of time travel often brush up against multiverse theory and the idea of alternate universes.

Apr 17, 2024

Unraveling Dark Energy and Cosmic Expansion With an 11-Ton Time Machine

Posted by in categories: cosmology, mapping, time travel

I found this on NewsBreak: Unraveling Dark Energy and Cosmic Expansion With an 11-Ton Time Machine.

Mar 31, 2024

Max More — Do you Like Living? Try Medical Time Travel — Cryopreservation

Posted by in categories: biotech/medical, cryonics, life extension, time travel

Talks about Medical Time Travel and Cryopreservation.

Mar 26, 2024

Time Travel for Tomorrow: Using Future Perspectives To Shape Today’s Tech

Posted by in categories: energy, sustainability, time travel

Researchers at Osaka University have discovered that considering sustainability issues through the lens of “imaginary future generations” provides valuable perspectives on technological advancements and trends in society.

The world stands on the brink of a crucial environmental threshold; the choices we make today about energy, resources, and the environment will have profound consequences for the future. Despite this, most sustainable thought tends to be limited to the viewpoint of current generations.

In a study published in Technological Forecasting and Social Change, researchers from Osaka University have revealed that adopting the perspective of “imaginary future generations” (IFGs) can yield fascinating insights into long-term social and technological trends.

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