Shattered glass does not leap back into your hand. Smoke from a match does not gather itself and crawl back inside. In ...

Time travel is deterministic and locally free, a paper says —resolving an age-old paradox. This follows research observing ...

A new experiment using Google’s Sycamore quantum processor has taken a bold step toward testing ideas from quantum gravity. For the first time, researchers successfully sent quantum information ...

Cybersecurity experts often warn that a moment known as Q-Day is nearby—a day when quantum computers will become powerful enough to break all the encryption methods we currently rely on to keep our ...

Time travel has long lived in the realm of science fiction, but a growing body of physics research now argues that journeys into the past might fit inside known laws of nature without tearing ...

Using a quantum computer to simulate time travel, researchers have demonstrated that, in the quantum realm, there is no "butterfly effect." In the research, information—qubits, or quantum bits—'time ...

Physicists have coaxed particles of light into undergoing opposite transformations simultaneously, like a human turning into a werewolf as the werewolf turns into a human. In carefully engineered ...

There is a glaring gap in our knowledge of the physical world: none of our well-established theories describe gravity’s quantum nature. Yet physicists expect that this quantum nature is essential for ...