We discuss in detail how to consistently impose boundary conditions in quantum string cosmology. Since a classical time parameter is absent in quantum gravity, such conditions must be imposed with respect to intrinsic variables. Constructing wave packets for minisuperspace models from different tree-level string effective actions, we explain in particular the meaning of a transition between “pr...

If one replaces the constraints of Ashtekar-Barbero $SU(2)$ gauge theory formulation Euclidean gravity by their $U(1)^3$ version, arrives at a consistent model which captures significant structure its version. In particular, it displays non trivial realisation hypersurface deformation algebra makes an interesting testing ground for (Euclidean) quantum as has been emphasised in recent series pap...

in this work, some of the lattice plasmon quantum features are examined. Initially, the interaction of the far-field photonic mode and the nanoparticle plasmon mode is investigated. We probe the optical properties of the array plasmon that are dramatically affected by the array geometry. It is notable to mention that the original goal of this work is to examine the quantum feature of the array ...

Stochastic quantisation is applied to the problem of calculating real-time evolution on a Minkowskian space-time lattice. We employ optimized updating using reweighting, or gauge fixing, respectively. These procedures do not affect the underlying theory, but strongly improve the stability properties of the stochastic dynamics.

The Symplectic Projector Method is applied to discuss quantisation aspects of an extended Abelian model with a pair of gauge potentials coupled by means of a mixed Chern-Simons term. We focuss on a field content that spans an N=2-D=3 supersymmetric theory whenever scalar and fermionic matter is suitably coupled to the family of gauge potentials.

The Symplectic Projector Method is applied to discuss quantisation aspects of an extended Abelian model with a pair of gauge potentials coupled by means of a mixed Chern-Simons term. We focuss on a field content that spans an N=2-D=3 supersymmetric theory whenever scalar and fermionic matter is suitably coupled to the family of gauge potentials.

The Symplectic Projector Method is applied to discuss quantisation aspects of an extended Abelian model with a mixed Chern-Simons term. We focus on a field content that spans an N=2-D=3 supersymmetric theory whenever fermions are suitably coupled to the family of gauge potentials.

One approach to defining dynamics for quantum gravity in a naturally timeless setting is select suitable matter degree of freedom as 'clock' before quantisation. This idea deparametrisation was recently introduced group field theory leading Hamiltonian formulation which states or operators evolve with respect the clock given by free massless scalar field, similar what happens deparametrised mod...