Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Centre National de la Recherche ScientifiqueFR2k papers
- Vrije Universiteit BrusselBE1.8k papers
- University of Maryland, College ParkUS1.7k papers
- RWTH Aachen UniversityDE1.6k papers
- Massachusetts Institute of TechnologyUS1.6k papers
- University of Wisconsin–MadisonUS1.5k papers
- The Ohio State UniversityUS1.5k papers
- Institut National de Physique Nucléaire et de Physique des ParticulesFR1.5k papers
- University of KansasUS1.5k papers
- UCLouvainBE1.5k papers
- Sungkyunkwan UniversityKR1.5k papers
- Universität HamburgDE1.5k papers
22 papers · 2 filters
Pseudo-Hermitian versus Hermitian position-dependent-mass Hamiltonians in a perturbative framework
B. Bagchi, C. Quesne, R. Roychoudhury
We formulate a systematic algorithm for constructing a whole class of Hermitian position-dependent-mass Hamiltonians which, to lowest order of perturbation theory, allow a descript…
Overdamping by weakly coupled environments
Massimiliano Esposito, Fritz Haake
A quantum system weakly interacting with a fast environment usually undergoes a relaxation with complex frequencies whose imaginary parts are damping rates quadratic in the couplin…
Control of mixed-state quantum systems by a train of short pulses
D. Sugny, A. Keller, O. Atabek +4
A density matrix approach is developped for the control of a mixed-state quantum system using a time-dependent external field such as a train of pulses. This leads to the definitio…
Laser control for the optimal evolution of pure quantum states
D. Sugny, A. Keller, O. Atabek +4
Starting from an initial pure quantum state, we present a strategy for reaching a target state corresponding to the extremum (maximum or minimum) of a given observable. We show tha…
Information transmission via entangled quantum states in Gaussian channels with memory
Nicolas J. Cerf, Julien Clavareau, Jérémie Roland +1
Gaussian quantum channels have recently attracted a growing interest, since they may lead to a tractable approach to the generally hard problem of evaluating quantum channel capaci…
Extremal quantum cloning machines
G. Chiribella, G. M. D'Ariano, P. Perinotti +1
We investigate the problem of cloning a set of states that is invariant under the action of an irreducible group representation. We then characterize the cloners that are "extremal…
Field-free two-direction alignment alternation of linear molecules by elliptic laser pulses
D. Daems, S. Guérin, E. Hertz +3
We show that a linear molecule subjected to a short specific elliptically polarized laser field yields postpulse revivals exhibiting alignment alternatively located along the ortho…
Pseudo-Hermiticity and some consequences of a generalized quantum condition
B. Bagchi, C. Quesne, R. Roychoudhury
We exploit the hidden symmetry structure of a recently proposed non-Hermitian Hamiltonian and of its Hermitian equivalent one. This sheds new light on the pseudo-Hermitian characte…
Separating the classical and quantum information via quantum cloning
M. Ricci, F. Sciarrino, N. J. Cerf +3
An application of quantum cloning to optimally interface a quantum system with a classical observer is presented, in particular we describe a procedure to perform a minimal disturb…
An exactly solvable model of two three-dimensional harmonic oscillators interacting with the quantum electromagnetic field: the Casimir-Polder potential
F. Ciccarello, E. Karpov, R. Passante
We consider two three-dimensional isotropic harmonic oscillators interacting with the quantum electromagnetic field in the Coulomb gauge and within dipole approximation. Using a Bo…
First-order intertwining operators and position-dependent mass Schrodinger equations in d dimensions
C. Quesne
The problem of d-dimensional Schrodinger equations with a position-dependent mass is analyzed in the framework of first-order intertwining operators. With the pair (H, H_1) of inte…
PT-supersymmetric partner of a short-range square well
C. Quesne, B. Bagchi, S. Mallik +3
In a box of size , a spatially antisymmetric square-well potential of a purely imaginary strength and size is interpreted as an initial element of the SUSY hi…
Efficient and long-lived field-free orientation of molecules by a single hybrid short pulse
D. Daems, S. Guérin, D. Sugny +1
We show that a combination of a half-cycle pulse and a short nonresonant laser pulse produces a strongly enhanced postpulse orientation. Robust transients that display both efficie…
Experimental demonstration of time coding quantum key distribution
William Boucher, Thierry Debuisschert
Time coding quantum key distribution with coherent faint pulses is experimentally demonstrated. A measured 3.3 % quantum bit error rate and a relative contrast loss of 8.4 % allow…
Reduced randomness in quantum cryptography with sequences of qubits encoded in the same basis
L. -P. Lamoureux, H. Bechmann-Pasquinucci, N. J. Cerf +2
We consider the cloning of sequences of qubits prepared in the states used in the BB84 or 6-state quantum cryptography protocol, and show that the single-qubit fidelity is unaffect…
New approach to (quasi)-exactly solvable Schrodinger equations with a position-dependent effective mass
B. Bagchi, P. Gorain, C. Quesne +1
By using the point canonical transformation approach in a manner distinct from previous ones, we generate some new exactly solvable or quasi-exactly solvable potentials for the one…
Work extraction from tripartite entanglement
Vincent Viguie, Koji Maruyama, Vlatko Vedral
The work extractable from correlated bipartite quantum systems can be used to distinguish entanglement from classical correlation. A natural question is now whether it can be gener…
k-Component q-deformed charge coherent states and their nonclassical properties
X. -M. Liu, C. Quesne, F. Song
k-Component q-deformed charge coherent states are constructed, their (over)completeness proved and their generation explored. The q-deformed charge coherent states and the even (od…
Cloning quantum entanglement in arbitrary dimensions
E. Karpov, P. Navez, N. J. Cerf
We have found a quantum cloning machine that optimally duplicates the entanglement of a pair of -dimensional quantum systems. It maximizes the entanglement of formation containe…
Conditional generation of arbitrary single-mode quantum states of light by repeated photon subtractions
Jaromir Fiurasek, Raul Garcia-Patron, Nicolas J. Cerf
We propose a scheme for the conditional generation of arbitrary finite superpositions of (squeezed) Fock states in a single mode of a traveling optical field. The suggested setup r…
PT-symmetric supersymmetry in a solvable short-range model
B. Bagchi, H. Bila, V. Jakubsky +3
The simplest purely imaginary and piecewise constant -symmetric potential located inside a larger box is studied. Unless its strength exceeds a certain critical value, all…
Quantum entanglement enhances the capacity of bosonic channels with memory
Nicolas J. Cerf, Julien Clavareau, Chiara Macchiavello +1
The bosonic quantum channels have recently attracted a growing interest, motivated by the hope that they open a tractable approach to the generally hard problem of evaluating quant…