Quantum Fisher information in a strange metal
Strange metal behaviour refers to a linear temperature dependence of the electrical resistivity at low temperatures instead of…
New tachyon theory could unlock the secrets of time travel and causality
Faster-than-light particles have spent decades in physics as both temptation and warning. They offered a way to test…
One of the Largest Physics Surveys Ever Finds No One Agrees on Anything
Last summer, Nature conducted a survey asking physicists about some quantum hot takes. That venture revealed significantly disparate…
The strange connection between falling balls and quantum weirdness
A ball tossed into the air follows a path that classical physics can track with confidence. Shrink that…
Scientists Claim Universe Has Seven Hidden Dimensions That Solve Black Holes’ Biggest Mystery
Black holes might not erase information after all—they could shrink into microscopic remnants that preserve every bit of…
A universal scheme to self-test any quantum state or measurement
Bell, J. S. On the Einstein-Podolsky-Rosen paradox. Phys. Phys. Fiz. 1, 195 (1964). MathSciNet Google Scholar Bell, J.…
Detecting genuine multipartite entanglement in multi-qubit devices with restricted measurements
Background and notation Let us first state some definitions from graph theory that are relevant for this paper.…
A Century Later, Ramanujan’s Pi Equations Are Helping Physicists Unlock the Secrets of Nature
In 1914, Indian mathematician Srinivasa Ramanujan published a short paper detailing several unusual formulas for calculating the value…
‘Zombie Stars’ Might Be a Beacon in Our Search for Dark Matter
As physicist Cumrun Vafa once told me, puzzles in science often come in pairs, each serving as the…
That Plate You Just Dropped Followed a Weirdly Predictable Rule You’ve Never Heard Of
One innate (perhaps underappreciated) function of physics is to explain and generalize how stuff works in the real…
Learning quantum states of continuous-variable systems
Trace distance The trace distance between two quantum states ρ1 and ρ2 is defined as $${d}_{{\rm{tr}}}(\;{\rho }_{1},{\rho }_{2}):=\frac{1}{2}\|{\rho…
Fermi polarons under strain-induced pseudomagnetic fields
Pseudospin in strained TMDs The spatial symmetry of TMDs dictates that a linearly polarized photon in a state…