40 citations · 163 across the 14 of their papers we have counts for
14 papers
Traversable Morris-Thorne-Buchdahl wormholes in quadratic gravity
Hoang Ky Nguyen, Mustapha Azreg-Aïnou
The special Buchdahl-inspired metric obtained in a recent paper [Phys. Rev. D 107, 104008 (2023)] describes asymptotically flat spacetimes in pure gravity. The me…
Buchdahl-inspired spacetimes and wormholes: Unearthing Hans Buchdahl's other 'hidden' treasure trove
Hoang Ky Nguyen
Circa 1962 Hans A. Buchdahl pioneered a program -- and made significant progress -- seeking vacuo configurations in pure gravity [H. A. Buchdahl, Nuovo Cimento 23…
Emerging Newtonian potential in pure gravity on a de Sitter background
Hoang Ky Nguyen
In Fortsch. Phys. , 176 (2016), Alvarez-Gaume et al established that pure theory propagates spin-2 graviton on a de Sitter (dS) background bu…
Revisiting Weak Energy Condition and wormholes in Brans-Dicke gravity
Hoang Ky Nguyen, Mustapha Azreg-Aïnou
It is known that the formation of a wormhole typically involves a violation of the Weak Energy Condition (WEC), but the reverse is not necessarily true. In the context of Brans-Dic…
Beyond Schwarzschild-de Sitter spacetimes: I. A new exhaustive class of metrics inspired by Buchdahl for pure gravity in a compact form
Hoang Ky Nguyen
Some sixty years ago Buchdahl pioneered a program in search of static spherically symmetric vacua for pure gravity (Nuovo Cimento, Vol 23, No 1, pp 141-157 (1962); [https:/…
Beyond Schwarzschild-de Sitter spacetimes: III. A perturbative vacuum with non-constant scalar curvature in gravity
Hoang Ky Nguyen
In violation of the generalized Lichnerowicz theorem advocated by Nelson and others, quadratic gravity admits vacua with non-constant scalar curvature. In a recent publication [Phy…