Non-Hermitian rotation-time reversal (RT)-symmetric spin models possess two distinct phases, the unbroken phase in which the entire spectrum is real and the broken phase which contains complex eigenspectral, thereby indicating…
Generating entanglement between more parties is one of the central tasks and challenges in the backdrop of building quantum technologies. I will discuss two recently proposed protocols to create genuine…
From quantum computation to communication, design of quantum devices and peripheral technology relies strongly on the interaction of light with matter. This requires not only modelling these interactions at the…
Metamaterials are artificial materials consisting of micro or nano composites which exhibit properties different from their components in sub-wavelength regime. These materials are finding applications in several areas such as…
In the classical RAM, we have the following useful property. If we have an algorithm that uses M memory cells throughout its execution, and in addition is sparse, in the…
We give a comprehensive characterization of the computational power of shallow quantum circuits combined with classical computation. Specifically, for classes of search problems, we show that the following statements hold,…
A future quantum network will allow distributing entanglement over in principle arbitrarily long distances. This topic holds importance for applications in quantum information science as well as for fundamental investigations…
Quantum Hamiltonian simulation (QHS) is one of the fundamental quantum sub-routines in quantum physics and quantum computing. QHS prepares a unitary approximately within some error bound for a given Hamiltonian.…
Optical photons are excellent quantum information carriers, but weak optical nonlinearity poses significant challenges to these systems' scalability and computational capabilities. Currently, only probabilistic methods can achieve nonlinear quantum operations…
Introduced in 2010 by Scott Aaronson and Alex Arkhipov, Boson sampling is a specific quantum task demonstrating that a quantum device, even in the presence of noise, can outperform classical…
