Publications de Marc-André Dupertuis

Bell Diagonal and Werner State Generation: Entanglement, Non-Locality, Steering and Discord on the IBM Quantum Computer

Marc-André Dupertuis, Nicolas Macris, Nicolas Schwaller, Chun Lam Chan, Frédéric Gessler, Su Yeon Chang, Samuel Bosch

We propose the first correct special-purpose quantum circuits for preparation of Bell diagonal states (BDS), and implement them on the IBM Quantum computer, characterizing and testing complex aspects of their quantum correlations in the full parameter spac ...

2021

Evidence of the entanglement constraint on wave-particle duality using the IBM Q quantum computer

Marc-André Dupertuis, Clément Christian Javerzac-Galy, Nicolas Schwaller

We experimentally verify the link existing between entanglement and the amount of wave-particle duality in a bipartite quantum system with superconducting qubits in the IBM Q quantum computer. We consider both pure and mixed states, and study the influence ...

AMER PHYSICAL SOC2021

Efficient Quantum Algorithms for GHZ and W States, and Implementation on the IBM Quantum Computer

Marc-André Dupertuis, Nicolas Macris, Clément Christian Javerzac-Galy, Kenichi Komagata, Fabien Gremion, Chun Lam Chan, Jarla Thiesbrummel, Romain Fournier

Efficient deterministic algorithms are proposed with logarithmic step complexities for the generation of entangled GHZ(N) and W-N states useful for quantum networks, and an implementation on the IBM quantum computer up to N = 16 is demonstrated. Improved q ...

WILEY2019

Symmetries and optical transitions of hexagonal quantum dots in GaAs/AlGaAs nanowires

Marc-André Dupertuis

We investigate the properties of electronic states and optical transitions in hexagonal GaAs quantum dots within Al0.3Ga0.7As nanowires, grown in axial direction [111]. Such dots are particularly interesting due to their high degree of symmetry. A streamli ...

Amer Physical Soc2015

Spectral signatures of high-symmetry quantum dots and effects of symmetry breaking

Marc-André Dupertuis, Elyahou Kapon, Daniel Oberli, Alok Rudra, Valentina Troncale

High symmetry epitaxial quantum dots (QDs) with three or more symmetry planes provide a very promising route for the generation of entangled photons for quantum information applications. The great challenge to fabricate nanoscopic high symmetry QDs is furt ...

Iop Publishing Ltd2015

Nanostructure Symmetry: Relevance for Physics and Computing

Marc-André Dupertuis, Daniel Oberli, Sascha Dalessi, Benjamin Gallinet

We review the research done in recent years in our group on the effects of nanostructure symmetry, and outline its relevance both for nanostructure physics and for computations of their electronic and optical properties. The exemples of C3v and C2v quantum ...

Amer Inst Physics2014

Symmetries and the Polarized Optical Spectra of Exciton Complexes in Quantum Dots

Marc-André Dupertuis, Elyahou Kapon, Daniel Oberli, Alok Rudra

A systematic and simple theoretical approach is proposed to analyze true degeneracies and polarized decay patterns of exciton complexes in semiconductor quantum dots. The results provide reliable spectral signatures for efficient symmetry characterization, ...

2011

Symmetry Elevation and Symmetry Breaking: Keys to Describe and Explain Excitonic Complexes in Semiconductor Quantum Dots

Marc-André Dupertuis, Elyahou Kapon, Daniel Oberli, Alok Rudra

The results of a group theoretical analysis of the excitonic fine structure are presented and compared with spectroscopic data on single quantum dots. The spectral features reveal the signatures of a symmetry higher than the crystal symmetry (C-3v). A cons ...

Amer Inst Physics, 2 Huntington Quadrangle, Ste 1No1 D, Melville, Ny 11747-4501 Usa2011

Fine structure of exciton complexes in high-symmetry quantum dots: Effects of symmetry breaking and symmetry elevation

Marc-André Dupertuis, Elyahou Kapon, Daniel Oberli, Alok Rudra

Quantum dots (QDs) of high symmetry (e.g., C3v) have degenerate bright exciton states, unlike QDs of C2v symmetry, making them intrinsically suitable for the generation of entangled photon pairs. Deviations from C3v symmetry are detected in real QDs by pol ...

American Physical Society2010

Analysis of photonic crystal defect modes by maximal symmetrization and reduction

Marc-André Dupertuis, Benjamin Gallinet

We analyze in depth the eigenmodes symmetry of the vectorial electromagnetic wave equation with discrete symmetry, using a recently developed maximal symmetrization and reduction scheme leading to an automatic technique which decomposes every mode into its ...

2010

Maximal symmetrization and reduction of fields: Application to wave functions in solid-state nanostructures

Marc-André Dupertuis, Sascha Dalessi

A general formalism for the maximal symmetrization and reduction of fields (MSRFs) is proposed and applied to wave functions in solid-state nanostructures. Its primary target is to provide an essential tool for the study and analysis of the electronic and ...

2010

Role of fermion exchanges in statistical signatures of composite bosons

Marc-André Dupertuis

We study statistical signatures of composite bosons made of two fermions by extending number states to these quantum particles. Two-particle correlations as well as the dispersion of the probability distribution are analyzed. We show that the particle comp ...

2009

Effect of fermionic components on trion-electron scattering

Marc-André Dupertuis

To test the validity of replacing a composite fermion by an elementary fermion, we calculate the transition rate from a state made of one free electron and one trion to a similar electron-trion pair, through the time evolution of such a pair induced by Cou ...

Elsevier2008

Closure relations for composite bosons: Difference between polaritons and Wannier or Frenkel excitons

Marc-André Dupertuis

We derive the closure relation for N polaritons made of three different types of excitons: bosonized excitons, Frenkel, or Wannier excitons. In the case of polaritons made of Wannier excitons, we show how this closure relation, which appears as nondiagonal ...

2008

Nonorthogonal theory of polarons and application to pyramidal quantum dots

Marc-André Dupertuis, Elyahou Kapon, Sascha Dalessi, Danail Obreschkow

We present a general theory for semiconductor polarons in the framework of the Frohlich interaction between electrons and phonons. The latter is investigated using noncommuting phonon creation/annihilation operators associated with a natural set of nonorth ...

2007

An integrated holding-beam-at-transparency (hbat) configuration for semiconductor optical amplification or emission

Benoît Marie Joseph Deveaud, Marc-André Dupertuis, Andrea Crottini

An optical device for amplifying or emitting an optical beam of given wavelength comprises an optical source (20) in combination with a primary optical device (10) which is a semiconductor optical amplifier (SOA), a gain-clamped semiconductor optical ampli ...

2006

Polarization-Resolved Optical Absorption in Single V-groove Quantum Wires

Klaus Leifer, Marc-André Dupertuis, Elyahou Kapon, Alok Rudra, Susanna Palmgren

AIP American Institute of Physics2006

Alloy Segregation, Quantum Confinement and Carrier Capture in Self-Ordered Pyramidal Quantum Wires

Klaus Leifer, Marc-André Dupertuis, Elyahou Kapon, Sascha Dalessi, Qing Zhu

2006

Optical injection of charge current in quantum wires: oscillations induced by excitonic effects

Daniel Marti, Benoît Marie Joseph Deveaud, Marc-André Dupertuis

We investigate the charge current that is optically injected by interference between one- and two-photon excitation in the presence of excitonic effects. We consider a realistic V-shaped quantum wire excited slightly below the band gap by two simultaneous ...

2005

Charged excitons in modulation-doped quantum wires

Marc-André Dupertuis, Benjamin Dwir, Elyahou Kapon, Daniel Oberli, Nicolas Moret

We report on the observation of negatively- and positively-charged excitons in the photoluminescence spectra of V-groove quantum wires. The. charged exciton binding energy increases with the strength of the quantum confinement. We demonstrate that fluctuat ...

American Institute of Physics2005