78 citations · 307 across the 13 of their papers we have counts for
13 papers
Extensive characterization of a family of efficient three-qubit gates at the coherence limit
Christopher W. Warren, Jorge Fernández-Pendás, Shahnawaz Ahmed +13
While all quantum algorithms can be expressed in terms of single-qubit and two-qubit gates, more expressive gate sets can help reduce the algorithmic depth. This is important in th…
Random-access quantum memory using chirped pulse phase encoding
James O'Sullivan, Oscar W. Kennedy, Kamanasish Debnath +9
As in conventional computing, key attributes of quantum memories are high storage density and, crucially, random access, or the ability to read from or write to an arbitrarily chos…
Ancilla mediated qubit readout and heralded entanglement between rare-earth dopant ions in crystals
Kamanasish Debnath, Alexander Holm Kiilerich, Klaus Mølmer
Owing to their long excited state lifetimes, rare-earth ions in crystals are widely used in quantum applications. To allow optical readout of the qubit state of individual ions, we…
Self-stimulated pulse echo trains from inhomogeneously broadened spin ensembles
Kamanasish Debnath, Gavin Dold, John J. L. Morton +1
We show experimentally and describe theoretically how a conventional magnetic resonance Hahn echo sequence can lead to a self-stimulated pulse echo train when an inhomogeneously br…
Collective dynamics of inhomogeneously broadened emitters coupled to an optical cavity with narrow linewidth
Kamanasish Debnath, Yuan Zhang, Klaus Mølmer
We study collective effects in an inhomogeneously broadened ensemble of two-level emitters coupled to an optical cavity with narrow linewidth. Using second order mean field theory…
Coherent spectral hole burning and qubit isolation by stimulated Raman adiabatic passage
Kamanasish Debnath, Alexander Holm Kiilerich, Albert Benseny +1
We describe how stimulated Raman adiabatic passage (STIRAP) can be applied to create spectral holes in an inhomogeneously broadened system. Due to the robustness of STIRAP, our pro…
Lasing in the superradiant crossover regime
Kamanasish Debnath, Yuan Zhang, Klaus Mølmer
A new class of laser, which harnesses coherence in both light and atoms, is possible with the use of ultra-cold alkaline earth atoms trapped in an optical lattice inside an optical…
Nonequilibrium photonic transport and phase transition in an array of optical cavities
Kamanasish Debnath, Eduardo Mascarenhas, Vincenzo Savona
We characterize photonic transport in a boundary driven array of nonlinear optical cavities. We find that the output field suddenly drops when the chain length is increased beyond…
Amplified opto-mechanical transduction of virtual radiation pressure
Mauro Cirio, Kamanasish Debnath, Neill Lambert +1
Here we describe how, utilizing a time-dependent opto-mechanical interaction, a mechanical probe can provide an amplified measurement of the virtual photons dressing the quantum gr…
Leggett--Garg inequality violations with a large ensemble of qubits
Neill Lambert, Kamanasish Debnath, Anton Frisk Kockum +3
We investigate how discrete internal degrees of freedom in a quasi-macroscopic system affect the violation of the Leggett--Garg inequality, a test of macroscopic-realism based on t…
Cavity quantum electrodynamics of ultracold atoms in optical and optomechanical cavities
Kamanasish Debnath, Aranya B. Bhattacherjee
In this review article, we present the recent theoretical developments and some breakthrough experiments in cavity QED systems (optical and optomechanical systems) and also focus o…
Non equilibrium dynamics of an optomechanical Dicke model
Kamanasish Debnath, Aranya B. Bhattacherjee
Motivated by the experimental realization of Dicke model in optical cavities, we model an optomechanical system consisting of a two level BEC with transverse pumping. We investigat…
Selective entanglement in a two-mode optomechanical system
Neha Aggarwal, Kamanasish Debnath, Sonam Mahajan +2
We analyze an optomechanical system formed by a mechanical mode and the two optical modes of an optomechanical cavity for the realization of a strongly quantum correlated three-mod…