Category: Physics and Astronomy
Curvature shapes chiral transport and entanglement in fermions
What the study found The study found that spacetime curvature in AdS2 and AdS2 black hole backgrounds can produce strongly asymmetric, or chiral, wave propagation for Dirac fermions. The authors report that this propagation is confined within an inhomogeneous Lieb-Robinson cone, a bound on how fast information spreads in a system. Why the authors say…
Artificial satellite arrays improve axionlike dark matter sensitivity
What the study found A proposed Artificial Pulsar Polarization Array (APPA) — a satellite network with multiple pulsed signal transmitters and one receiver satellite — was simulated to test sensitivity to axionlike dark matter. The simulations indicated that APPA could give a tighter upper limit on the axion-photon coupling parameter, g_aγ, than conventional ground-based observations…
New quantum bit thread prescriptions match holographic entropy formula
What the study found The authors derive several new quantum bit thread prescriptions for holographic entanglement entropy. They report that these prescriptions are equivalent, for static states, to the quantum extremal surface formula. Why the authors say this matters The study suggests that these prescriptions provide new ways to describe holographic entanglement entropy. The authors…
Finite environments limit objectivity in quantum Brownian motion
What the study found The study revisits objectivity in the quantum Brownian motion model under the recoilless, or Born-Oppenheimer, limit. It finds that complete objectivity cannot be achieved when the environment has only a finite number of oscillators, and that objectivity depends on timescales. Why the authors say this matters The authors say the work…
Hardware-efficient Mølmer–Sørensen gate performs comparably on superconducting hardware
What the study found A hardware-efficient implementation of the Mølmer–Sørensen gate was tested on superconducting quantum hardware and showed performance close to the device’s native controlled-NOT (CX) gate. The gate also produced the target Bell state from the |00⟩ input with a reported success probability of 94.2%. Why the authors say this matters The authors…
2D Abelian gauge theories show rich phase structure
What the study found Abelian gauge theories in 1+1 dimensions can have a surprisingly rich phase structure as masses are varied. The abstract says these systems include critical lines or points with central charge c = 1 and c = 1/2, and it also points to 2D chiral gauge theories as a setting for symmetric…
Non-Gaussian redshift-space Minkowski tensors show qualified perturbation-theory success
What the study found The study found that perturbation-theory predictions for Minkowski tensors in redshift space are a qualified success when compared with dark matter simulation measurements. It also found that nonperturbative Finger-of-God effects remain significant at relatively large scales, especially in components parallel to the line of sight. Why the authors say this matters…
Machine learning helped identify viable dark matter regions in 2HDM2S
What the study found The study reports that a machine learning-based exploration, using Evolutionary Strategies, was able to efficiently search for regions with a viable dark matter candidate in the 2HDM2S model, a two real scalar singlet extension of the two Higgs doublet model. Why the authors say this matters The authors present this as…
Collinear-limit OPEs preserve translation symmetry with sub-leading terms
What the study found The authors find that the leading term in the operator algebra of light-transformed operators is fixed only when sub-leading terms are taken into account. They also derive a scaling dimension and an OPE coefficient for the leading term, and begin a similar study for shadow-transformed graviton correlators. Why the authors say…
Hybrid scaling explains overlapping Yang-Lee critical regions
What the study found The study found that, in the overlapping critical region between classical and quantum Yang-Lee edge singularities, scaling behavior can be described by a hybrid scaling mechanism. This means scaling functions from both critical regimes apply at the same time and obey a constraint relation. Why the authors say this matters The…
