Bigourd, Damien, Chatel, Béatrice, Schleich, Wolfgang P., Girard, Bertrand
We report on the successful operation of an analogue computer designed to factor numbers. Our device relies solely on the interference of classical light and brings together the field of ultrashort...
Chirping a two-photon transition in a multi-state ladder (2007)
Merkel, Wolfgang, Mack, Holger, Schleich, Wolfgang P., Lutz, Eric, Paulus, Gerhard G., Girard, Bertrand
We consider a two-photon transition in a specific ladder system driven by a chirped laser pulse. In the weak field limit, we find that the excited state probability amplitude arises due to...
Ground state cooling in a bad cavity (2006)
Zippilli, Stefano, Morigi, Giovanna, Schleich, Wolfgang P.
We study the mechanical effects of light on an atom trapped in a harmonic potential when an atomic dipole transition is driven by a laser and it is strongly coupled to a mode of an optical resonator....
Extracting Atoms on Demand with Lasers (2004)
Mohring, Bernd, Bienert, Marc, Haug, Florian, Morigi, Giovanna, Schleich, Wolfgang P., Raizen, Mark G.
We propose a scheme that allows to coherently extract cold atoms from a reservoir in a deterministic way. The transfer is achieved by means of radiation pulses coupling two atomic states which are...
Wave Packets can Factorize Numbers (2002)
Mack, Holger, Bienert, Marc, Haug, Florian, Freyberger, Matthias, Schleich, Wolfgang P.
We draw attention to various aspects of number theory emerging in the time evolution of elementary quantum systems with quadratic phases. Such model systems can be realized in actual experiments. Our...
Wave packet dynamics and factorization of numbers (2002)
Mack, Holger, Bienert, Marc, Haug, Florian, Straub, Frank S., Freyberger, Matthias, Schleich, Wolfgang P.
We connect three phenomena of wave packet dynamics: Talbot images, revivals of a particle in a box and fractional revivals. The physical origin of these effects is deeply rooted in phase factors...
On the concepts of radial and angular kinetic energies (2001)
Dahl, Jens Peder, Schleich, Wolfgang P.
We consider a general central-field system in D dimensions and show that the division of the kinetic energy into radial and angular parts proceeds differently in the wavefunction picture and the...
Unravelling quantum carpets: a travelling wave approach (1999)
Hall, Michael J. W., Reineker, Martina S., Schleich, Wolfgang P.
Quantum carpets are generic spacetime patterns formed in the probability distributions P(x,t) of one-dimensional quantum particles, first discovered in 1995. For the case of an infinite square well...
Endoscopic Tomography and Quantum-Non-Demolition (1998)
Fortunato, Mauro, Tombesi, Paolo, Schleich, Wolfgang P.
We propose to measure the quantum state of a single mode of the radiation field in a cavity---the signal field---by coupling it via a quantum-non-demolition Hamiltonian to a meter field in a highly...
The Fermi accelerator in atom optics (1998)
Saif, Farhan, Bialynicki-Birula, Iwo, Fortunato, Mauro, Schleich, Wolfgang P.
We study the classical and quantum dynamics of a Fermi accelerator realized by an atom bouncing off a modulated atomic mirror. We find that in a window of the modulation amplitude dynamical...
Quantum-Non-Demolition Endoscopic Tomography (1998)
Fortunato, Mauro, Tombesi, Paolo, Schleich, Wolfgang P.
We present a new indirect method to measure the quantum state of a single mode of the electromagnetic field in a cavity. Our proposal combines the idea of (endoscopic) probing and that of tomography...
Fortunato, Mauro, Kurizki, Gershon, Schleich, Wolfgang P.
We propose a method which can effectively stabilize fixed points in the classical and quantum dynamics of a phase-sensitive chaotic system with feedback. It is based on feeding back a selected...
Fortunato, Mauro, Kurizki, Gershon, Schleich, Wolfgang P.
We propose a scheme which can effectively restore fixed points in the quantum dynamics of repeated Jaynes-Cummings interactions followed by atomic state measurements, when the interaction times...
Direct and indirect strategies for phase measurement (1997)
Fontenelle, Marcia T., Braunstein, Samuel L., Schleich, Wolfgang P., Hillery, Mark
Recently, Torgerson and Mandel [Phys. Rev. Lett. 76, 3939 (1996)] have reported a disagreement between two schemes for measuring the phase difference of a pair of optical fields. We analyze these...
Fractional Talbot effect in phase space: A compact summation formula (1997)
Banaszek, Konrad, Wodkiewicz, Krzysztof, Schleich, Wolfgang P.
A phase space description of the fractional Talbot effect, occurring in a one-dimensional Fresnel diffraction from a periodic grating, is presented. Using the phase space formalism a compact...