3 papers
gr-qc2026
New Rotating Black Hole in Electromagnetic Fields: Cosmological Horizon without Cosmological Constant
Liang Ma, H. Lu
We obtain a new electrovacuum and related background spacetime that contains a cosmological horizon supported entirely by the electromagnetic field. The local solution belongs to t…
gr-qc2026
Global Distinctions Between New Electrovacuum and Kundt Class
Liang Ma, H. Lu
It was observed [2606.30426] that our recently constructed electrovacuum [2606.23782], supported by electromagnetic fields, can be locally transformed to a special Petrov type D so…
hep-th2025
Consistent Warped Reduction of Heterotic Supergravity
Liang Ma, H. Lu
We find a curious duality between the bosonic sector of heterotic supergravity and the noncritical bosonic string with conformal anomaly. This allows us to map the Mink$_4\times S^…