14 citations · 14 across the 11 of their papers we have counts for
11 papers
Self-Gravitating Magnetic Monopoles and Dyons in String-Inspired Models: Structure and Stability
Nick E. Mavromatos, Sarben Sarkar, Dionysios P. Theodosopoulos
We present classical magnetic--monopole (MM) and dyon solutions induced by global monopoles in string-inspired gravitational models. Although several ingredients of the constructio…
The -Effect from a Multimode Squeezed Graviton State
Nick E. Mavromatos, Sarben Sarkar
The -effect in entangled neutral-meson systems provides a sensitive probe of CPT violation induced by quantum-gravitational environments. In open quantum systems, interactions w…
How Much Can Gravitons Be Squeezed?
Panagiotis Dorlis, Nick E. Mavromatos, Sarben Sarkar +1
Quantum Gravity remains elusive, largely because its observable effects are suppressed by powers of the Planck scale. Direct detection of single gravitons is widely believed to be…
On the stability of Born-Infeld-regularised electroweak monopoles
N E Mavromatos, Sarben Sarkar
The Cho-Maison monopole provides a monopole solution of the electroweak field equations, but possesses an infinite classical energy due to the Maxwell form of the hypercharge secto…
The axion coupling accelerates the Universe through PT-symmetric phases
Leqian Chen, Nick E. Mavromatos, Sarben Sarkar
The conjecture by two of the authors (N.E.M. and S.S.) that a \cPT-symmetric phase plays a role in understanding singular renormalisation group (RG) flows for a Chern-Simons (CS) g…
Photon-Mediated Hybridization and Dissipative Transport in a Cavity-QED Ring-Acceptor Architecture
Stephon Alexander, Roger Andrews, Oliver Fox +1
We investigate excitation transfer in an engineered cavity QED transport architecture consisting of an N-site donor ring coupled coherently to a central acceptor and driven by a si…
Quantum Excitation Transfer in an Artificial Photosynthetic Light-Harvesting System
Stephon Alexander, Roger Andrews, Oliver Fox +1
We analytically derive transfer probabilities and efficiencies for an artificial light-harvesting photosynthetic system, which consists of a ring coupled to a central acceptor. For…
Phases of quartic scalar theories and PT symmetry
Leqian Chen, Sarben Sarkar
For quantum mechanical anharmonic oscillator-type Hamiltonians, it is shown that there is a relation between the energy eigenvalues of parity symmetric and PT-symmetric phases for…
PT symmetric fermionic particle oscillations in even dimensional representations
Leqian Chen, Sarben Sarkar
We describe a novel class of quantum mechanical particle oscillations in both relativistic and non-relativistic systems based on symmetry and (relevant for fermions),…
Piecewise linear potentials for false vacuum decay and negative modes
Wen-Yuan Ai, Jean Alexandre, Sarben Sarkar
We study bounce solutions and associated negative modes in the class of piecewise linear triangular-shaped potentials that may be viewed as approximations of smooth potentials. In…
False vacuum decay rates, more precisely
Wen-Yuan Ai, Jean Alexandre, Sarben Sarkar
We develop a method for accurately calculating vacuum decay rates beyond the thin-wall regime in a pure scalar field theory at the one-loop level of the effective action. It accoun…