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Prof. Dr. Fabian Hassler

Prof. Dr. Fabian Hassler
Institute for Quantum Information
Physikzentrum, Modulbau 2, room 110
Sommerfeldstrasse 26
52056 Aachen

Phone: +49-241-80 27012
Fax: +49-241-80 22188
E-Mail:  hassler(at)physik.rwth-aachen.de

 

Research Interests:

Mesoscopic physics

  • Majorana fermions for topological quantum computation applications
  • Superconducting qubits as quantum-information or measurement devices
  • Classification of topological insulator via transport properties
  • Shot noise and full counting statistics of charge transport

Atomic, molecular, and optical physics

  • Excitations in atomic strongly-correlated Fermi systems
  • Light emission from proximity-coupled semiconducting p-n junctions

Publications and Presentations:

Publications

S. Spilla, F. Hassler, and J. Splettstoesser,
"Measurement and dephasing of a flux qubit due to heat currents",
arXiv:1311.7561.

Ch. Ohm and F. Hassler,
"Majorana fermions coupled to electromagnetic radiation",
New J. Phys. 16, 015009 (2014), (arXiv:1309.7314).

F. Konschelle and F. Hassler,
"Effects of non-equilibrium noise on a quantum memory encoded in Majorana zero modes",
Phys. Rev. B 88, 075431 (2013), (arXiv:1306.2519).

D. Pekker, C.-Y. Hou, D. L. Bergman, S. Goldberg, İ. Adagideli, and F. Hassler,
"Suppression of 2π phase-slip due to hidden zero modes in one dimensional topological superconductors",
Phys. Rev. B 87, 064506 (2013), (arXiv:1209.2161).

F. Hassler and D. Schuricht,
"Strongly interacting Majorana modes in an array of Josephson junctions",
New J. Phys. 14, 125018 (2012), (arXiv:1206.2134).

F. Domínguez, F. Hassler, and G. Platero,
"Dynamical detection of Majorana fermions in current-biased nanowires",
Phys. Rev. B 86, 140503(R) (2012), (arXiv:1202.0642).

B. M. Terhal, F. Hassler, and D. P. DiVincenzo,
"From Majorana Fermions to Topological Order",
Phys. Rev. Lett. 108, 260504 (2012), (arXiv:1201.3757).

C. Padurariu, F. Hassler, and Yu. V. Nazarov,
"Statistics of radiation at Josephson parametric resonance",
Phys. Rev. B 86, 054514 (2012), (arXiv:1112.4159).

B. van Heck, A. R. Akhmerov, F. Hassler, M. Burrello, and C. W. J. Beenakker,
"Coulomb-assisted braiding of Majorana fermions in a Josephson junction array",
New J. Phys. 14, 035019 (2012), (arXiv:1111.6001).

I. C. Fulga, F. Hassler, A. R. Akhmerov, and C. W. J. Beenakker,
"Topological quantum number and critical exponent from conductance fluctuations at the quantum Hall plateau transition",
Phys. Rev. B 84, 245447 (2011), (arXiv:1110.4280).

B. van Heck, F. Hassler, A. R. Akhmerov, and C. W. J. Beenakker,
"Coulomb stability of the 4π-periodic Josephson effect of Majorana fermions",
Phys. Rev. B 84, 180502(R) (2011), (arXiv:1108.1095).

I. C. Fulga, F. Hassler, and A. R. Akhmerov,
"Scattering theory of topological insulators and superconductors",
Phys. Rev. B 85, 165409 (2012), (arXiv:1106.6351).

F. Hassler, A. R. Akhmerov, and C. W. J. Beenakker,
"Top-transmon: hybrid superconducting qubit for parity-protected quantum computation",
New J. Phys. 13, 095004 (2011), (arXiv:1105.0315).

I. C. Fulga, F. Hassler, A. R. Akhmerov, and C. W. J. Beenakker,
"Scattering formula for the topological quantum number of a disordered multi-mode wire",
Phys. Rev. B 83, 155429 (2011), (arXiv:1101.1749).

C.-Y. Hou, F. Hassler, A. R. Akhmerov, and J. Nilsson,
"Probing Majorana edge states with a flux qubit",
Phys. Rev. B 84, 054538 (2011), (arXiv:1101.0604).

F. Godschalk, F. Hassler, and Yu. V. Nazarov,
"Proposal for an optical laser producing light at half the Josephson frequency",
Phys. Rev. Lett. 107, 073901 (2011), (arXiv:1010.5960).

A. R. Akhmerov, J. P. Dahlhaus, F. Hassler, M. Wimmer, and C. W. J. Beenakker,
"Quantized conductance at the Majorana phase transition in a disordered superconducting wire",
Phys. Rev. Lett. 106, 057001 (2011), (arXiv:1009.5542).

B. Küng, S. Gustavsson, T. Choi, I. Shorubalko, O. Pfäffli, F. Hassler, G. Blatter, M. Reinwald, W. Wegscheider, S. Schön, T. Ihn, and and K. Ensslin,
"Measurement Back-Action in Quantum Point-Contact Charge Sensing",
Entropy 12, 1721 (2010), (pdf).

F. Hassler, A. R. Akhmerov, and C. W. J. Beenakker,
"Flat-lens focusing of electrons on the surface of a topological insulator",
Phys. Rev. B 82, 125423 (2010), (arXiv:1005.5093).

F. Hassler, A. R. Akhmerov, C.-Y. Hou, and C. W. J. Beenakker,
"Anyonic interferometry without anyons: How a flux qubit can read out a topological qubit",
New J. Phys. 12, 125002 (2010), (arXiv:1005.3423).

F. Hassler, A. Rüegg, M. Sigrist, and G. Blatter,
"Dynamical Unbinding Transition in a Periodically Driven Mott Insulator",
Phys. Rev. Lett. 104, 220402 (2010), (arXiv:1002.3085).

I. C. Fulga, F. Hassler, and C. W. J. Beenakker,
"Nonzero temperature effects on antibunched photons emitted by a quantum point contact out of equilibrium",
Phys. Rev. B 81, 115331 (2010), (arXiv:1001.4389).

F. Hassler, G. B. Lesovik, and G. Blatter,
"Influence of a Random Telegraph Process on the Transport through a Point Contact",
Eur. Phys. J. B 83, 349 (2011), (arXiv:1001.0578).

F. Hassler, Yu. V. Nazarov, and L. P. Kouwenhoven,
"Quantum manipulation in a Josephson LED",
Nanotechnology 21, 274004 (2010), (arXiv:0911.5100).

B. Küng, S. Gustavsson, T. Choi, I. Shorubalko, T. Ihn, S. Schön, F. Hassler, G. Blatter, and K. Ensslin,
"Noise-induced spectral shift measured in a Double Quantum Dot",
Phys. Rev. B 80, 115315 (2009), (arXiv:0904.3656).

F. Hassler, B. Küng, G. B. Lesovik, and G. Blatter,
"Single-Particle Excitations Generated by Voltage Pulses",
AIP Conf. Proc. 1134, 113 (2009), (arXiv:1110.0441).

F. Hassler and S. D. Huber,
"Coherent pumping of a Mott insulator: Fermi golden rule versus Rabi oscillations",
Phys. Rev. A 79, 021607(R) (2009), (arXiv:0812.0532).

F. Hassler, M. V. Suslov, G. M. Graf, M. V. Lebedev, G. B. Lesovik, and G. Blatter,
"Wave-packet Formalism of Full Counting Statistics",
Phys. Rev. B 78, 165330 (2008), (arXiv:0802.0143).

F. Hassler, G. B. Lesovik, and G. Blatter,
"Effects of Exchange Symmetry on Full Counting Statistics",
Phys. Rev. Lett. 99, 076804 (2007), (cond-mat/0612693).

G. B. Lesovik, F. Hassler, and G. Blatter,
"Using Qubits to Measure Fidelity in Mesoscopic Systems",
Phys. Rev. Lett. 96, 106801 (2006), (cond-mat/0507200).

Theses

F. Hassler, "Wave-Packet Approach to Full Counting Statistics",
Ph.D. Thesis, ETH Zürich, Switzerland (January 28, 2009).

F. Hassler, "Dissipation in Superconducting Tetrahedral Quantum Bits",
Diploma Thesis, ETH Zürich, Switzerland (March 18, 2005).

Seminars and Colloquia

RWTH Aachen, Germany (April 28, 2011),
"Braiding Majorana fermions and superconducting vortices: hybrid structures for topological quantum computation".

CEA Saclay, France (April 20, 2011),
"Quantum manipulation in a Josephson light emitting diode".

University of Würzburg, Germany (February 22, 2011),
"How flux qubits can be used to measure Majorana fermions".

FU Berlin, Germany (January 19, 2011),
"Interaction between Majorana fermions and flux qubits".

ETH Zürich, Switzerland (November 12, 2010),
"Majorana bound states in nanowires".

AMP Colloquium, ETH Zürich, Switzerland (April 23, 2009),
"Transport of Two Noninteracting Electrons: Measuring the Spin by Looking at the Charge".

Weizmann Institute, Rehovot, Israel (February 12, 2009),
"Single Electrons in Quantum Wires: Generation, Propagation, and Detection".

CNRS Grenoble, Grenoble, France (December 12, 2008),
"Wave-Packet Formalism of Full Counting Statistics".

ETH Zürich (QSIT seminar), Zürich, Switzerland (October 2, 2008),
"A First-Quantized Way to Tackle Constant Voltage in Quantum Transport".

Leiden University, Leiden, Netherlands (March 4, 2008),
"Full Counting Statistics: from Few to Many Particles".

Talks

Quantum Mesoscopic Physics, Moriond 2011,
La Thuile, Italy (March 17, 2011),
"Anyonic interferometry without anyons: How a flux qubit can read out a topological qubit".

Correlated Phenomena in Low-Dimensional Systems,
MPIPKS Dresden, Germany (July 6, 2010),
"From Fermi's golden rule to Rabi oscillations: Dynamical unbinding transition in a Mott insulator."

QSIT Junior Meeting,
Ausserferrera, Switzerland (June 10, 2008),
"Signature of Exchange Statistics in the Measurement of the Average Current".

QSIT Start Meeting,
Arosa, Switzerland (January 24, 2008),
"Full Counting Statistics of Mesoscopic Transport".

Trends in future electronics,
Bordeaux, France (May 10, 2006),
"Stability and Noise in Tetrahedral Qubits".

Meeting on Quantum Systems for Information Technology,
Engelberg, Switzerland (March 22, 2006),
"Superconducting Tetrahedral Qubit with Broken Symmetry".

QSIT Workshop, Arosa, Switzerland (January 21, 2006),
"Using Qubits for Measuring Full Counting Statistics".

Posters

Time-dependent dynamics and non-equilibrium quantum systems,
Budapest, Hungary (May 2010),
"Dynamical unbinding transition in a periodically driven Mott insulator".

Physics@FOM,
Veldhoven, Netherlands (January 2010),
"A driven Mott insulator: from Fermi's golden rule to Rabi oscillations".

International Conference on Quantum Engineering,
Monte Verità, Switzerland (June 2009),
"Full Counting Statistics: from Few to Many Particles".

Annual meeting of the Swiss Physical Society 2008,
Geneva, Switzerland (March 2008),
"Two Particle Processes in the Transport of Fermions".

Quantum Transport and Nanophysics, Moriond 2008,
La Thuile, Italy (March 2008),
"Wave-Packet Formalism of Full Counting Statistics".

Windsor Summer School 'Quantum Transport and Dynamics in Nanostructures',
Windsor, UK (August 2007),
"Nonlinear Response due to Exchange Effects".

Annual meeting of the Swiss Physical Society 2006,
Lausanne, Switzerland (February 2006),
"Relation between Sensitivity and Partitioning in Mesoscopic Systems".

International Conference on Nanoelectronics 2006,
Lancaster University, UK (January 2006),
"Using Qubits for Measuring Fidelity in Mesoscopic Systems".

Swiss Workshop on Materials with Novel Electronic Properties,
Les Diablerets, Switzerland (September 2005),
"Using Qubits for Measuring Fidelity in Mesoscopic Systems".

Control and Manipulation of Quantum Systems,
Monte Verità, Switzerland (July 2005),
"Current-Phase Relation of Tetrahedral Superconducting Cluster".

Abschlußinformationen