Institute of Advanced Studies (IAS)
Recent Submissions

Stabilizing Rabi oscillation of a charge qubit via the atomic clock technique
(2018)We propose a superconducting circuitatom hybrid, where the Rabi oscillation of single excess Cooper pair in the island is stabilized via the common atomic clock technique. The noise in the superconducting circuit is mapped ... 
Squeezing Enhances Quantum Synchronization
(2018)It is desirable to observe synchronization of quantum systems in the quantum regime, defined by the low number of excitations and a highly nonclassical steady state of the selfsustained oscillator. Several existing proposals ... 
Focus on atomtronicsenabled quantum technologies
(2017)Atomtronics is an emerging field in quantum technology that promises to realize ‘atomic circuit’ architectures exploiting ultracold atoms manipulated in versatile microoptical circuits generated by laser fields of different ... 
Theoretical description of a micromaser in the ultrastrongcoupling regime
(2017)We theoretically investigate an ultrastrongcoupled micromaser based on Rydberg atoms interacting with a superconducting LC resonator, where the common rotatingwave approximation and slowly varying envelope approximation ... 
Separability criteria with angular and Hilbert space averages
(2016)The practically useful criteria of separable states ρ=∑k wkρk in d=2×2 are discussed. The equality G(a,b)=4[〈ψP(a)⊗P(b)ψ〉−〈ψP(a)⊗1ψ〉〈ψ1⊗P(b)ψ〉]=0 for any two projection operators P(a) and P(b) provides a necessary ... 
Fast nonAbelian geometric gates via transitionless quantum driving
(20151221)A practical quantum computer must be capable of performing high fidelity quantum gates on a set of quantum bits (qubits). In the presence of noise, the realization of such gates poses daunting challenges. Geometric phases, ... 
GdN thin film: Chern insulating state on square lattice
(20151110)Using firstprinciples calculations, we predict a Chern insulating phase in thin films of the ferromagnetic semimetal GdN. In contrast to previously proposed Chern insulator candidates, which mostly rely on honeycomb ... 
Electronic structure of the antiferromagnetic topological insulator candidate GdBiPt
(20150615)We studied the electronic structures of antiferromagnetic (AFM) GdBiPt with propagating vectors Q1⃗ =(0,0,π) (Atype) and Q2⃗ =(π,π,π) (Gtype) by performing firstprinciples calculation based on densityfunctional theory ... 
Simulation and detection of photonic Chern insulators in a onedimensional circuitQED lattice
(20151012)We introduce a conceptually simple and experimentally feasible method to realize and detect photonic topological Chern insulators with a onedimensional circuit quantum electrodynamics lattice. By periodically modulating ... 
Halfskyrmion and vortexantivortex pairs in spinor condensates
(20150917)We propose a simple experimental scheme to generate spin textures in the ground state of interacting ultracold bosonic atoms loaded in a twodimensional harmonic trap. Our scheme is based on two copropagating LaguerreGauss ... 
Triangular and honeycomb lattices of cold atoms in optical cavities
(20151008)We consider a twodimensional homogeneous ensemble of cold bosonic atoms loaded inside two optical cavities and pumped by a fardetuned external laser field. We examine the conditions for these atoms to selforganize into ... 
Electronic Properties of Fluoride and Half–fluoride Superlattices KZnF3/KAgF3 and SrTiO3/KAgF3
(20151030)We present the formation of cupratelike electronic structures in KAgF3–related superlattices resulted from the confinement together with structural chemical modification by using the generalized gradient approximation ... 
Orbitaldependent ElectronHole Interaction in Graphene and Associated MultiLayer Structures
(20151127)We develop an orbitaldependent potential to describe electronhole interaction in materials with structural 2D character, i.e. quasi2D materials. The modulated orbitaldependent potentials are also constructed with ... 
Characterization of a novel endoglucanase from Ganoderma lucidum
(2015)We evaluated the production and characterization of endoglucanase from Ganoderma lucidum using different lignocellulose biomasses. We purified a novel carboxymethyl cellulose (CMC) hydrolyzing endoglucanase from the whiterot ... 
Beyond Gisin’s theorem and its applications : violation of local realism by twoparty EinsteinPodolskyRosen steering
(2015)We demonstrate here that for a given mixed multiqubit state if there are at least two observers for whom mutual EinsteinPodolskyRosen steering is possible, i.e. each observer is able to steer the other qubits into two ... 
Coherent superposition of current flows in an atomtronic quantum interference device
(2015)We consider a correlated Bose gas tightly confined into a ring shaped lattice, in the presence of an artificial gauge potential inducing a persistent current through it. A weak link painted on the ring acts as a source of ... 
Scalable quantum memory in the ultrastrong coupling regime
(2015)Circuit quantum electrodynamics, consisting of superconducting artificial atoms coupled to onchip resonators, represents a prime candidate to implement the scalable quantum computing architecture because of the presence ... 
Contribution of radicals and ions in catalyzed growth of singlewalled carbon nanotubes from lowtemperature plasmas
(2015)The growth kinetics of singlewalled carbon nanotubes (SWCNTs) in a lowtemperature, lowpressure reactive plasma is investigated using a multiscale numerical simulation, including the plasma sheath and surface diffusion ... 
Creation of quantum error correcting codes in the ultrastrong coupling regime
(2015)We propose to construct large quantum graph codes by means of superconducting circuits working at the ultrastrong coupling regime. In this physical scenario, we are able to create a cluster state between any pair of qubits ... 
Z2 quantum memory implemented on circuit quantum electrodynamics
(2014)We present a technique to store and retrieve single and twoqubit states into a parityprotected quantum memory implemented on a stateoftheart superconducting circuit architecture. Our proposal relies upon a specific ...