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Vacuum Fluctuations

All articles tagged with #vacuum fluctuations

science1 day ago•57 min saved

Lab Visualizes Quantum Vacuum Fluctuations with Ultracold Atoms

Physicists directly imaged vacuum fluctuations in a lab-made two-dimensional Bose-Einstein condensate of potassium-39, using two internal atomic states to encode a quantum field and an amplification protocol that makes pre-existing fluctuations observable while distinguishing them from thermal or experimental noise. The measured fluctuation spectrum matches expectations for vacuum fluctuations, and the system can emulate a sine-Gordon quantum field, offering a controllable platform to explore phenomena like false-vacuum decay, particle production, and topological defects in quantum fields.

via Yahoo|

#bose-einstein-condensate #quantum-field-theory #quantum-simulation

science2 days ago•7 min saved

Lab Direct Imaging Reveals Quantum Vacuum Fluctuations in a Cold-Atom Field

Physicists used a two-dimensional Bose-Einstein condensate of potassium-39 to directly image vacuum fluctuations, amplifying pre-existing quantum jitter to distinguish it from thermal noise. The resulting measurements align with vacuum-origin fluctuations and can emulate relativistic sine-Gordon fields, offering a controllable laboratory platform for probing quantum-field phenomena and potential processes like particle production and false-vacuum decay.

via ScienceAlert|

#bose-einstein-condensate #lab-simulations #quantum-field-theory

science9 days ago•13 min saved

Vacuum-boosted superconductivity observed in NbSe2 inside a split-ring cavity

A Nature study reports that embedding NbSe2 in a split-ring cavity resonator increases its superconducting transition temperature, as well as the critical current and critical field near Tc. The results align with theory that hybridization between electronic states and fluctuating cavity modes lowers the superconducting state's energy, providing a noninvasive proof-of-principle that vacuum fluctuations can enhance superconductivity with potential implications for quantum technologies.

via Nature|

#nbse2 #quantum-materials #science

science1 month ago•2 min saved

Vanish the Mirror, Create a Multi-Photon Edge

Physicists model removing a mirror while a photon's wave packet is reflecting and find that a sharp edge cannot form in a single photon; instead, a time-dependent boundary creates a multi-photon edge via Bogoliubov transformations, pulling photons from the vacuum. Instantaneous removal would diverge the photon number, while gradual changes yield only a small finite amount.

via American Physical Society|

#bogoliubov-transformations #photon #quantum-field-theory

science1 year ago•3 min saved

Quantum Simulation Reveals Unexpected Light in Darkness

Researchers simulated how ultra-high laser pulses can generate a fourth beam of light from vacuum, confirming a long-predicted quantum effect called four-wave mixing, which could soon be tested with advanced laser facilities worldwide.

via ScienceAlert|

#extreme-light-infrastructure #laser-technology #photon-scattering

quantum-computing3 years ago•3 min saved

MIT Achieves Groundbreaking Control of Quantum Randomness

MIT researchers have achieved a breakthrough in quantum technologies by controlling quantum randomness using "vacuum fluctuations." This milestone opens up possibilities for probabilistic computing and ultra-precise field sensing. By injecting a weak laser "bias" into an optical parametric oscillator, the researchers were able to create controllable quantum randomness, allowing for the manipulation of probability distributions. This development has implications for simulating complex dynamics and optimizing systems that involve uncertainty and randomness.

via SciTechDaily|

#control #mit #probabilistic-computing