Wolfgang Alt

Group members

Dr. Wolfgang Alt

Contact

Last position
in our group:

Senior scientist

Field of research
in our group:

Few-atom quantum systems
Fibre cavity QED
Digital quantum simulators

Publications(up to 2022)

2022

F. G. Winkelmann, C. A. Weidner, G. Ramola, W. Alt, D. Meschede and A. Alberti
Direct measurement of the Wigner function of atoms in an optical trap, Phys. B: At. Mol. Opt. Phys. 55, 194004 (2022)arXiv BibTeX

C. Robens, I. Arrazola, W. Alt, D. Meschede, L. Lamata, E. Solano and A. Alberti
Boson Sampling with Ultracold Atoms, arXiv:2208.12253 [quant-ph], (2022)arXiv BibTeX

E. Uruñuela, M. Ammenwerth, P. Malik, L. Ahlheit, H. Pfeifer, W. Alt and D. Meschede
Raman imaging of atoms inside a high-bandwidth cavity, Phys. Rev. A 105, 043321 (2022)arXiv BibTeX

H. Pfeifer, L. Ratschbacher, J. Gallego, C. Saavedra, A. Faßbender, A. v. Haaren, W. Alt, S. Hofferberth, M. Köhl, S. Linden and D. Meschede
Achievements and perspectives of optical fiber Fabry–Perot cavities, App. Phys. B 128, 29 (2022)arXiv BibTeX

C. Saavedra, D. Pandey, W. Alt, D. Meschede and H. Pfeifer
A fiber Fabry-Perot cavity based spectroscopic gas sensor, arXiv:2205.06835, (2022)arXiv BibTeX

2021

G. Ness, M. R. Lam, W. Alt, D. Meschede, Y. Sagi and A. Alberti
Observing crossover between quantum speed limits, Sci. Adv. 7, abj9119 (2021)arXiv BibTeX

G. Ramola, R. Winkelmann, K. Chandrashekara, W. Alt, X. Peng, D. Meschede and A. Alberti
Ramsey imaging of optical traps, Phys. Rev. Appl. 16, 024041 (2021)arXiv BibTeX

M. R. Lam, N. Peter, T. Groh, W. Alt, C. Robens, D. Meschede, A. Negretti, S. Montangero, T. Calarco and A. Alberti
Demonstration of quantum brachistochrones between distant states of an atom, Phys. Rev. X (Featured in Physics) 11, 011035 (2021)arXiv BibTeX

C. Saavedra, D. Pandey, W. Alt, H. Pfeifer and D. Meschede
Tunable fiber Fabry-Perot cavities with high passive stability, Optics Express 29, 974 (2021)arXiv BibTeX

2020

P. v. Loock, W. Alt, C. Becher, O. Benson, H. Boche, C. Deppe, J. Eschner, S. Höfling, D. Meschede, P. Michler, F. Schmidt and H. Weinfurter
Extending Quantum Links: Modules for Fiber- and Memory-Based Quantum Repeaters, Adv. Quantum Technol., 1900141 (2020)arXiv BibTeX

E. Uruñuela, W. Alt, E. Keiler, D. Meschede, D. Pandey, H. Pfeifer and T. Macha
Ground-State Cooling of a Single Atom in a High-Bandwidth Cavity, Phys. Rev. A 101, 023415 (2020)arXiv BibTeX

T. Macha, E. Uruñuela, W. Alt, M. Ammenwerth, D. Pandey, H. Pfeifer and D. Meschede
Non-adiabatic Storage of Short Light Pulses in an Atom-Cavity System, Phys. Rev. A 101, 053406 (2020)arXiv BibTeX

2018

M. Zopf, T. Macha, R. Keil, E. Uruñuela, Y. Chen, W. Alt, L. Ratschbacher, F. Ding, D. Meschede and O. G. Schmidt
Frequency feedback for two-photon interference from separate quantum dots, Phys. Rev. B 98, 161302(R) (2018)arXiv BibTeX

J. Gallego, W. Alt, T. Macha, M. Martinez-Dorantes, D. Pandey and D. Meschede
Strong Purcell effect on a neutral atom trapped in an open fiber cavity, Phys. Rev. Lett. 121, 17360 (2018)arXiv BibTeX

C. Robens, S. Brakhane, W. Alt, D. Meschede, J. Zopes and A. Alberti
Fast, high-precision optical polarization synthesizer for ultracold-atom experiments, Phys. Rev. Applied 9, 034016 (2018)arXiv BibTeX

M. Martinez-Dorantes, W. Alt, J. Gallego, S. Ghosh, L. Ratschbacher and D. Meschede
State-dependent fluorescence of neutral atoms in optical potentials, Phys. Rev. A 97, 023410 (2018)arXiv BibTeX

2017

M. Martinez-Dorantes, W. Alt, J. Gallego, S. Ghosh, L. Ratschbacher, Y. Völzke and D. Meschede
Fast Nondestructive Parallel Readout of Neutral Atom Registers in Optical Potentials, Phys. Rev. Lett. 119, 180503 (2017)arXiv BibTeX

C. Robens, J. Zopes, W. Alt, S. Brakhane, D. Meschede and A. Alberti
Low-entropy states of neutral atoms in polarization-synthesized optical lattices, Phys. Rev. Lett. 118, 065302 (2017)arXiv BibTeX

C. Robens, S. Brakhane, W. Alt, F. Kleißler, D. Meschede, G. Moon, G. Ramola and A. Alberti
High numerical aperture (NA = 0.92) objective lens for imaging and addressing of cold atoms, Opt. Lett. 42, 1043 (2017)arXiv BibTeX

2016

T. Groh, S. Brakhane, W. Alt, D. Meschede, J. Asbóth and A. Alberti
Robustness of topologically protected edge states in quantum walk experiments with neutral atoms, Phys. Rev. A (Editors' Suggestion) 94, 013620 (2016)arXiv BibTeX

J. Gallego, S. Ghosh, S. K. Alavi, W. Alt, M. Martinez-Dorantes, D. Meschede and L. Ratschbacher
High Finesse Fiber Fabry-Perot Cavities: Stabilization and Mode Matching Analysis, Appl. Phys. B 122, 47 (2016)arXiv BibTeX

A. Alberti, C. Robens, W. Alt, S. Brakhane, M. Karski, R. Reimann, A. Widera and D. Meschede
Super-resolution microscopy of single atoms in optical lattices, New J. Phys. 18, 053010 (2016)arXiv BibTeX

C. Robens, W. Alt, C. Emary, D. Meschede and A. Alberti
Atomic "bomb testing": the Elitzur-Vaidman experiment violates the Leggett-Garg inequality, Appl. Phys. B 123, 12 (2016)arXiv BibTeX

2015

C. Robens, W. Alt, D. Meschede, C. Emary and A. Alberti
Ideal Negative Measurements in Quantum Walks Disprove Theories Based on Classical Trajectories, Phys. Rev. X (Featured in Physics) 5, 011003 (2015)arXiv BibTeX

R. Reimann, W. Alt, T. Kampschulte, T. Macha, L. Ratschbacher, N. Thau, S. Yoon and D. Meschede
Cavity-Modified Collective Rayleigh Scattering of Two Atoms, Phys. Rev. Lett. 114, 023601 (2015)arXiv BibTeX

S. Brakhane, W. Alt, D. Meschede, C. Robens, G. Moon and A. Alberti
Ultra-low birefringence dodecagonal vacuum glass cell, Rev. Sci. Instrum. 86, 126108 (2015)arXiv BibTeX

S. Brakhane, W. Alt, D. Meschede, C. Robens and A. Alberti
Polarisationserhaltende Vakuum-Zelle zur Anwendung oder Messung elektromagnetischer Wellen im Vakuum, Patent pending, (2015)BibTeX

2014

T. Kampschulte, W. Alt, S. Manz, M. Martinez-Dorantes, R. Reimann, S. Yoon, D. Meschede, M. Bienert and G. Morigi
Electromagnetically-induced-transparency control of single-atom motion in an optical cavity, Phys. Rev. A 89, 033404 (2014)arXiv BibTeX

S. Gammelmark, W. Alt, T. Kampschulte, D. Meschede and K. Mølmer
Hidden Markov Model of atomic quantum jump dynamics in an optically probed cavity, Phys. Rev. A 89, 043839 (2014)arXiv BibTeX

A. Alberti, W. Alt, R. Werner and D. Meschede
Decoherence Models for Discrete-Time Quantum Walks and their Application to Neutral Atom Experiments, New J. Phys. 16, 123052 (2014)arXiv BibTeX

R. Reimann, W. Alt, T. Macha, D. Meschede, N. Thau, S. Yoon and L. Ratschbacher
Carrier-free Raman manipulation of trapped neutral atoms, New J. Phys. 16, 113042 (2014)arXiv BibTeX

2013

A. Steffen, W. Alt, M. Genske, D. Meschede, C. Robens and A. Alberti
In-situ measurement of vacuum window birefringence by atomic spectroscopy, Rev. Sci. Instrum. 84, 126103 (2013)arXiv BibTeX

M. Genske, W. Alt, A. Steffen, A. H. Werner, R. F. Werner, D. Meschede and A. Alberti
Electric quantum walks with individual atoms, Phys. Rev. Lett. 110, 190601 (2013)arXiv BibTeX

N. Belmechri, L. Förster, W. Alt, A. Widera, D. Meschede and A. Alberti
Microwave control of atomic motional states in a spin-dependent optical lattice, J. Phys. B: At. Mol. Opt. Phys. 46, 104006 (2013)arXiv BibTeX

2012

A. Steffen, A. Alberti, W. Alt, N. Belmechri, S. Hild, M. Karski, A. Widera and D. Meschede
A digital atom interferometer with single particle control on a discretized spacetime geometry, PNAS 109, 9770 (2012)arXiv BibTeX

S. Brakhane, W. Alt, T. Kampschulte, M. Martinez-Dorantes, R. Reimann, S. Yoon, A. Widera and D. Meschede
Bayesian Feedback Control of a Two-Atom Spin-State in an Atom-Cavity System, Phys. Rev. Lett. 109, 173601 (2012)arXiv BibTeX

U. Wiedemann, W. Alt and D. Meschede
Switching photochromic molecules adsorbed on optical microfibres, Opt. Express 20, 12710-12720 (2012)BibTeX

2011

M. Karski, L. Förster, J. Choi, W. Alt, A. Alberti, A. Widera and D. Meschede
Direct Observation and Analysis of Spin-Dependent Transport of Single Atoms in a 1D Optical Lattice, J. Korean Phys. Soc. 59, 2947 (2011)arXiv BibTeX

A. Widera, W. Alt and D. Meschede
Coherently Walking, Rocking and Blinding Single Neutral Atoms, J. Phys.: Conf. Ser. 264, 012021 (2011)BibTeX

R. Garcia-Fernandez, W. Alt, F. Bruse, C. Dan, K. Karapetyan, O. Rehband, A. Stiebeiner, U. Wiedemann, D. Meschede and A. Rauschenbeutel
Optical nanofibers and spectroscopy, Applied Physics B 105, 3–15 (2011)arXiv BibTeX

2010

T. Kampschulte, W. Alt, S. Brakhane, M. Eckstein, R. Reimann, A. Widera and D. Meschede
Optical control of the refractive index of a single atom, Phys. Rev. Lett. 105, 153603 (2010)arXiv BibTeX

M. Karski, L. Förster, J. Choi, A. Steffen, N. Belmechri, W. Alt, D. Meschede and A. Widera
Imprinting Patterns of Neutral Atoms in an Optical Lattice using Magnetic Resonance Techniques, New J. Phys. 12, 065027 (2010)arXiv BibTeX

S. Reick, K. Mølmer, W. Alt, M. Eckstein, T. Kampschulte, L. Kong, R. Reimann, A. Thobe, A. Widera and D. Meschede
Analyzing quantum jumps of one and two atoms strongly coupled to an optical cavity, J. Opt. Soc. Am. B 27, A152 (2010)arXiv BibTeX

U. Wiedemann, K. Karapetyan, C. Dan, D. Pritzkau, W. Alt, S. Irsen and D. Meschede
Measurement of submicrometre diameters of tapered optical fibres using harmonic generation, Opt. Express 18, 7693–7704 (2010)BibTeX

2009

M. Karski, L. Förster, J. Choi, W. Alt, A. Widera and D. Meschede
Nearest-Neighbor Detection of Atoms in a 1D Optical Lattice by Fluorescence Imaging, Phys. Rev. Lett. 102, 053001 (2009)arXiv BibTeX

L. Förster, M. Karski, J. Choi, A. Steffen, W. Alt, D. Meschede, A. Widera, E. Montano, J. H. Lee, W. Rakreungdet and P. S. Jessen
Microwave Control of Atomic Motion in Optical Lattices, Phys. Rev. Lett. 103, 233001 (2009)arXiv BibTeX

M. Karski, L. Förster, J. Choi, A. Steffen, W. Alt, D. Meschede and A. Widera
Quantum Walk in Position Space with Single Optically Trapped Atoms, Science 325, 174 (2009)arXiv BibTeX

M. Khudaverdyan, W. Alt, T. Kampschulte, S. Reick, A. Thobe, A. Widera and D. Meschede
Quantum jumps and spin dynamics of interacting atoms in a strongly coupled atom-cavity system , Phys. Rev. Lett. 103, 123006 (2009)arXiv BibTeX

2008

M. Khudaverdyan, W. Alt, I. Dotsenko, T. Kampschulte, K. Lenhard, A. Rauschenbeutel, S. Reick, K. Schörner, A. Widera and D. Meschede
Controlled insertion and retrieval of atoms coupled to a high-finesse optical resonator, New J. Phys. 10, 073023 (2008)arXiv BibTeX

2007

G. Sagué, E. Vetsch, W. Alt, D. Meschede and A. Rauschenbeutel
Cold-Atom Physics Using Ultrathin Optical Fibers: Light-Induced Dipole Forces and Surface Interactions, Phys. Rev. Lett. 99, 163602 (2007)arXiv BibTeX

2006

Y. Miroshnychenko, W. Alt, I. Dotsenko, L. Förster, M. Khudaverdyan, D. Meschede, D. Schrader and A. Rauschenbeutel
An atom-sorting machine, Nature 442, 151 (2006)BibTeX

Y. Miroshnychenko, W. Alt, I. Dotsenko, L. Förster, M. Khudaverdyan, A. Rauschenbeutel and D. Meschede
Precision preparation of strings of trapped neutral atoms, New J. Phys. 8, 191 (2006)arXiv BibTeX

L. Förster, W. Alt, I. Dotsenko, M. Khudaverdyan, D. Meschede, Y. Miroshnychenko, S. Reick and A. Rauschenbeutel
Number-triggered loading and collisional redistribution of neutral atoms in a standing wave dipole trap, New J. Phys. 8, 259 (2006)BibTeX

Y. Miroshnychenko, W. Alt, I. Dotsenko, L. Förster, M. Khudaverdyan, D. Meschede, S. Reick and A. Rauschenbeutel
Inserting two atoms into a single optical micropotential, Phys. Rev. Lett. 97, 243003 (2006)arXiv BibTeX

2005

I. Dotsenko, W. Alt, M. Khudaverdyan, S. Kuhr, D. Meschede, Y. Miroshnychenko, D. Schrader and A. Rauschenbeutel
Submicrometer position control of single trapped neutral atoms, Phys. Rev. Lett. 95, 033002 (2005)arXiv BibTeX

M. Khudaverdyan, W. Alt, I. Dotsenko, L. Förster, S. Kuhr, D. Meschede, Y. Miroshnychenko, D. Schrader and A. Rauschenbeutel
Adiabatic Quantum State Manipulation of Single Trapped Atoms, Phys. Rev. A 71, 031404 (2005)arXiv BibTeX

S. Kuhr, W. Alt, D. Schrader, I. Dotsenko, Y. Miroshnychenko, A. Rauschenbeutel and D. Meschede
Analysis of dephasing mechanisms in a standing-wave dipole trap, Phys. Rev. A 72, 023406 (2005)arXiv BibTeX

2004

W. Alt
Optical control of single neutral atoms, (2004), PhD thesisBibTeX

I. Dotsenko, W. Alt, S. Kuhr, D. Schrader, M. Müller, Y. Miroshnychenko, V. Gomer, A. Rauschenbeutel and D. Meschede
Application of electro-optically generated light fields for Raman spectroscopy of trapped Cesium atoms, Appl. Phys. B 78, 711-717 (2004)BibTeX

2003

Y. Miroshnychenko, D. Schrader, S. Kuhr, W. Alt, I. Dotsenko, M. Khudaverdyan, A. Rauschenbeutel and D. Meschede
Continued imaging of the transport of a single neutral atom, Opt. Express 11, 3498-3502 (2003)BibTeX

D. Schrader, S. Kuhr, W. Alt, Y. Miroshnychenko, I. Dotsenko, W. Rosenfeld, M. Khudaverdyan, V. Gomer, A. Rauschenbeutel and D. Meschede
Controlled transport of single neutral atom qubits, Proceedings of the 16th ICOLS, (2003)BibTeX

S. Kuhr, W. Alt, D. Schrader, I. Dotsenko, Y. Miroshnychenko, W. Rosenfeld, M. Khudaverdyan, V. Gomer, A. Rauschenbeutel and D. Meschede
Coherence properties and quantum state transportation in an optical conveyor belt, Phys. Rev. Lett. 91, 213002 (2003)arXiv BibTeX

W. Alt, D. Schrader, S. Kuhr, M. Müller, V. Gomer and D. Meschede
Single atoms in a standing-wave dipole trap, Phys. Rev. A 67, 033403 (2003)arXiv BibTeX

2002

W. Alt
An objective lens for efficient fluoresence detection of single atoms, Optik 113, 142 (2002)arXiv BibTeX

2001

S. Kuhr, W. Alt, D. Schrader, M. Müller, V. Gomer and D. Meschede
Deterministic Delivery of a Single Atom, Science 293, 278 (2001)BibTeX

D. Schrader, S. Kuhr, W. Alt, M. Müller, V. Gomer and D. Meschede
An optical conveyor belt for single neutral atoms, Appl. Phys. B 73, 819 (2001)arXiv BibTeX

2000

D. Frese, B. Ueberholz, S. Kuhr, W. Alt, D. Schrader, V. Gomer and D. Meschede
Single Atoms in an Optical Dipole Trap: Towards a Deterministic Source of Cold Atoms, Phys. Rev. Lett. 85, 3777 (2000)arXiv BibTeX