Physical Review Letters (PRL), established in 1958, is a peer reviewed, scientific journal that is published 52 times per year by the American Physical Society. According to various measurement standards, which includes the Journal Citation Reports impact factor, Physical Review Letters is considered to be a prestigious journal in the field of physics. PRL is published as a print journal, and is in electronic format, online and CD-ROM. Its focus is rapid dissemination of significant, or notable, results of fundamental research on all topics related to all fields of physics. This is accomplished by rapid publication of short reports, called "Letters". Papers are published and available electronically one article at a time. When published in such a manner, the paper is available to be cited by other work. Three editors are listed for this journal: Jack Sandweiss, George Basbas, and Reinhardt B. Schuhmann. Physical Review Letters is an internationally read physics journal, describing a diverse readership. Advances in physics, as well as cross disciplinary developments, are disseminated weekly, via this publication. Topics covered by this journal are also the explicit titles for each

### New insight into proving math's million-dollar problem: the Riemann hypothesis (Update)

(Phys.org)—Researchers have discovered that the solutions to a famous mathematical function called the Riemann zeta function correspond to the solutions of another, different kind of function that may make it easier to ...

### Multiphoton interference observed beyond coherence time

For the first time, scientists have experimentally demonstrated how multiphoton interference with thermal light can be observed beyond the coherence time, paving the way to a possible new range of applications in high-precision ...

### Physicists guide electromagnetic waves along an infinitesimal line

(Phys.org)—Physicists have demonstrated a new mode of electromagnetic wave called a "line wave," which travels along an infinitely thin line along the interface between two adjacent surfaces with different electromagnetic ...

### Still no violation of Lorentz symmetry, despite strongest test yet

(Phys.org)—Physicists have found the strongest evidence yet for no violation of Lorentz symmetry, one of the fundamental symmetries of relativity. Lorentz symmetry states that the outcome of an experiment does not depend ...

### Friction in the vacuum?

(Phys.org)—When three physicists first discovered through their calculations that a decaying atom moving through the vacuum experiences a friction-like force, they were highly suspicious. The results seemed to go against ...

### Quantum physics offers new way to factor numbers

(Phys.org)—Any number can, in theory, be written as the product of prime numbers. For small numbers, this is easy (for example, the prime factors of 12 are 2, 2, and 3), but for large numbers, prime factorization becomes ...

### Separate experiments show no evidence of violation of Lorentz invariance

(Phys.org)—Two teams of researchers working independently of one another have conducted experiments designed to test Lorentz invariance; both report no violations. One of the teams used decades of data from lunar lasing ...

### Solving systems of linear equations with quantum mechanics

(Phys.org)—Physicists have experimentally demonstrated a purely quantum method for solving systems of linear equations that has the potential to work exponentially faster than the best classical methods. The results show ...

### CP violation or new physics?

(Phys.org)—Over the past few years, multiple neutrino experiments have detected hints for leptonic charge parity (CP) violation—a finding that could help explain why the universe is made of matter and not antimatter. ...

### The thermodynamics of learning

(Phys.org)—While investigating how efficiently the brain can learn new information, physicists have found that, at the neuronal level, learning efficiency is ultimately limited by the laws of thermodynamics—the same principles ...