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Quantum coherence, quantum statistics, and superconductivity in mesoscopic systems

English title Quantum coherence, quantum statistics, and superconductivity in mesoscopic systems
Applicant Bruder Christoph
Number 137551
Funding scheme Project funding (Div. I-III)
Research institution Departement Physik Universität Basel
Institution of higher education University of Basel - BS
Main discipline Theoretical Physics
Start/End 01.10.2011 - 30.09.2014
Approved amount 441'344.00
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Keywords (10)

condensed-matter theory; quantum coherence; quantum computing; quantum control; nanomechanics; entanglement; superconductivity; quantum transport; optomechanics; ultracold atoms

Lay Summary (English)

Lead
Lay summary
The physics of mesoscopic systems, i.e., electronic structures in the
nanometer range, is one of the most active research areas of
condensed-matter physics. These systems allow us to study fundamental
physics questions, and their understanding is a necessary prerequisite
for possible future electronic device applications.  The goal of our
research is to exploit and analyze quantum interference effects in
such electronic circuits. In the last couple of years, new exciting
areas have opened up, like nanomechanics, or the interface of
ultracold atoms and condensed-matter systems.

In particular, our group (about 3 PhD students and 3 Postdocs) plans
to study the interplay of electric currents through nanostructures
with mechanical degrees of freedom (nanomechanics).  We are also
interested in fluctuation and noise phenomena: electrical currents are
not exactly constant but fluctuate, and these fluctuations contain a
great deal of information about the quantum nature of the electrons
that carry the current. We will also investigate ultracold atoms which
can be used to study quantum coherence and quantum many-body
phenomena. Cold atoms can be trapped in so-called optical lattices and
show similarities to electrons in a crystal lattice. The great
advantage of cold atoms is that the properties of the lattice can be
controlled much more easily than in the case of a crystal
lattice. Finally, we are also interested in the foundations of quantum
mechanics (entanglement, weak measurements in solid-state systems).
Direct link to Lay Summary Last update: 21.02.2013

Responsible applicant and co-applicants

Employees

Publications

Publication
Adiabatic quantum pumping of chiral Majorana fermions
Alos-Palop M., Tiwari Rakesh P., Blaauboer M. (2014), Adiabatic quantum pumping of chiral Majorana fermions, in PHYSICAL REVIEW B, 89(4), 045307.
Josephson effect in normal and ferromagnetic topological-insulator junctions: Planar, step, and edge geometries
Nussbaum Jennifer, Schmidt Thomas L., Bruder Christoph, Tiwari Rakesh P. (2014), Josephson effect in normal and ferromagnetic topological-insulator junctions: Planar, step, and edge geometries, in PHYSICAL REVIEW B, 90(4), 045413.
Quantum charge pumping through fractional fermions in charge density modulated quantum wires and Rashba nanowires
Saha Arijit, Rainis Diego, Tiwari Rakesh P., Loss Daniel (2014), Quantum charge pumping through fractional fermions in charge density modulated quantum wires and Rashba nanowires, in PHYSICAL REVIEW B, 90(3), 035422.
Quantum transport signatures of chiral edge states in Sr2RuO4
Tiwari Rakesh P., Belzig W., Sigrist Manfred, Bruder C. (2014), Quantum transport signatures of chiral edge states in Sr2RuO4, in PHYSICAL REVIEW B, 89(18), 184512.
Signatures of tunable Majorana-fermion edge states
Tiwari Rakesh P., Zuelicke U., Bruder C. (2014), Signatures of tunable Majorana-fermion edge states, in NEW JOURNAL OF PHYSICS, 16, 025004.
Equivalence between an optomechanical system and a Kerr medium
Aldana Samuel, Bruder Christoph, Nunnenkamp Andreas (2013), Equivalence between an optomechanical system and a Kerr medium, in PHYSICAL REVIEW A, 88(4), 043826.
Majorana Fermions from Landau Quantization in a Superconductor and Topological-Insulator Hybrid Structure
Tiwari Rakesh P., Zuelicke U., Bruder C. (2013), Majorana Fermions from Landau Quantization in a Superconductor and Topological-Insulator Hybrid Structure, in PHYSICAL REVIEW LETTERS, 110(18), 186805.
Majorana Qubit Rotations in Microwave Cavities
Schmidt Thomas L., Nunnenkamp Andreas, Bruder Christoph (2013), Majorana Qubit Rotations in Microwave Cavities, in PHYSICAL REVIEW LETTERS, 110(10), 107006.
Measuring Ultrasmall Time Delays of Light by Joint Weak Measurements
Struebi Gregory, Bruder C. (2013), Measuring Ultrasmall Time Delays of Light by Joint Weak Measurements, in PHYSICAL REVIEW LETTERS, 110(8), 083605.
Microwave-controlled coupling of Majorana bound states
Schmidt Thomas L., Nunnenkamp Andreas, Bruder Christoph (2013), Microwave-controlled coupling of Majorana bound states, in NEW JOURNAL OF PHYSICS, 15, 025043.
Nonsymmetrized Correlations in Quantum Noninvasive Measurements
Bednorz Adam, Bruder Christoph, Reulet Bertrand, Belzig Wolfgang (2013), Nonsymmetrized Correlations in Quantum Noninvasive Measurements, in PHYSICAL REVIEW LETTERS, 110(25), 250404.
Point contacts and localization in generic helical liquids
Orth Christoph P., Strübi Grégory, Schmidt Thomas L. (2013), Point contacts and localization in generic helical liquids, in Phys. Rev. B, 88, 165315-165315.
Quantum limit of laser cooling in dispersively and dissipatively coupled optomechanical systems
Weiss Talitha, Nunnenkamp Andreas (2013), Quantum limit of laser cooling in dispersively and dissipatively coupled optomechanical systems, in PHYSICAL REVIEW A, 88(2), 023850.
Strategy for implementing stabilizer-based codes on solid-state qubits
Tanamoto Tetsufumi, Stojanovic Vladimir M., Bruder Christoph, Becker Daniel (2013), Strategy for implementing stabilizer-based codes on solid-state qubits, in PHYSICAL REVIEW A, 87(5), 052305.
Strong-coupling effects in dissipatively coupled optomechanical systems
Weiss Talitha, Bruder Christoph, Nunnenkamp Andreas (2013), Strong-coupling effects in dissipatively coupled optomechanical systems, in NEW JOURNAL OF PHYSICS, 15, 045017.
Suppression of conductance in a topological insulator nanostep junction
Alos-Palop M., Tiwari Rakesh P., Blaauboer M. (2013), Suppression of conductance in a topological insulator nanostep junction, in PHYSICAL REVIEW B, 87(3), 035432.
Cooling in the single-photon strong-coupling regime of cavity optomechanics
Nunnenkamp A., Borkje K., Girvin S. M. (2012), Cooling in the single-photon strong-coupling regime of cavity optomechanics, in PHYSICAL REVIEW A, 85(5), 051803-051803.
Electron-Phonon Coupling in Crystalline Organic Semiconductors: Microscopic Evidence for Nonpolaronic Charge Carriers
Vukmirovic Nenad, Bruder C., Stojanovic Vladimir M. (2012), Electron-Phonon Coupling in Crystalline Organic Semiconductors: Microscopic Evidence for Nonpolaronic Charge Carriers, in PHYSICAL REVIEW LETTERS, 109(12), 126407-126407.
Mean-field analysis of spinor bosons in optical superlattices
Wagner Andreas, Nunnenkamp Andreas, Bruder Christoph (2012), Mean-field analysis of spinor bosons in optical superlattices, in PHYSICAL REVIEW A, 86(2), 023624-023624.
Preserving universal resources for one-way quantum computing
Tanamoto Tetsufumi, Becker Daniel, Stojanovic Vladimir M., Bruder Christoph (2012), Preserving universal resources for one-way quantum computing, in PHYSICAL REVIEW A, 86(3), 032327-032327.
Quantum-control approach to realizing a Toffoli gate in circuit QED
Stojanovic Vladimir M., Fedorov A., Wallraff A., Bruder C. (2012), Quantum-control approach to realizing a Toffoli gate in circuit QED, in PHYSICAL REVIEW B, 85(5), 054504-054504.
Superfluid drag of two-species Bose-Einstein condensates in optical lattices
Hofer Patrick P., Bruder C., Stojanovic Vladimir M. (2012), Superfluid drag of two-species Bose-Einstein condensates in optical lattices, in PHYSICAL REVIEW A, 86(3), 033627-033627.
Greenberger-Horne-Zeilinger generation protocol for $N$ superconducting transmon qubits capacitively coupled to a quantum bus
Aldana Samuel, Wang Ying-Dan, Bruder C. (2011), Greenberger-Horne-Zeilinger generation protocol for $N$ superconducting transmon qubits capacitively coupled to a quantum bus, in Phys. Rev. B, 84, 134519-134519.
Spin-1 atoms in optical superlattices: Single-atom tunneling and entanglement
Wagner Andreas, Bruder Christoph, Demler Eugene (2011), Spin-1 atoms in optical superlattices: Single-atom tunneling and entanglement, in Phys. Rev. A, 84, 063636-063636.

Collaboration

Group / person Country
Types of collaboration
Prof. R. Fazio, Scuola Normale Superiore Pisa Italy (Europe)
- in-depth/constructive exchanges on approaches, methods or results
Prof. W. Belzig, Universitaet Konstanz Germany (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Prof. Uli Zuelicke, Victoria University of Wellington New Zealand (Oceania)
- in-depth/constructive exchanges on approaches, methods or results
- Publication

Scientific events

Active participation

Title Type of contribution Title of article or contribution Date Place Persons involved
EPS Condensed Matter Conference Talk given at a conference Quantum transport signatures of chiral edge states in Sr2RuO4 using Cooper pair splitters 25.08.2014 Paris, France Tiwari Rakesh;
New frontiers for Majorana fermions, from condensed to dark matter Talk given at a conference Majorana fermions from Landau quantization in a superconductor-topological-insulator hybrid structure 05.05.2014 Frascati, Italy Tiwari Rakesh;
Workshop on Frontiers of Nanomechanics Talk given at a conference Nonlinear optomechanics, dissipative coupling, and quantum synchronization, A. Nunnenkamp 10.09.2013 Trieste, Italy Bruder Christoph;
Frontiers of Nanomechanics Poster Quantum Synchronization of a driven self-sustained oscillator, S. Walter 09.09.2013 Trieste, Italy Bruder Christoph;
Workshop on Quantum Many Body Systems out of Equilibrium Talk given at a conference Super fluid drag of two-species Bose-Einstein condensates in optical lattices, C. Bruder 20.08.2013 Dresden, Germany Bruder Christoph;
Magnonics 2013 Poster Magnonic crystals as a waveguide for spin waves, R.P. Tiwari 06.08.2013 Vaarberg, Sweden Tiwari Rakesh;
Conference on Frontiers of Quantum and Mesoscopic Thermodynamics (FQMT 13) Talk given at a conference Analog quantum simulators of small-polaron physics, V. Stojanovic 01.08.2013 Prag, Czech Republic Bruder Christoph;
Research seminar Individual talk Optomechanics - Controlling mechanical motion with light and vice versa, A. Nunnenkamp 16.07.2013 Brisbane, Australia Bruder Christoph;
Workshop on Majorana Physics in Condensed Matter Poster Majorana fermions from Landau quantization in a superconductor-topological insulator hybrid structure, R.P. Tiwari 16.07.2013 Erice, Italy Tiwari Rakesh; Bruder Christoph;
Symposium on Quantum Hall Effects and Related Topics Poster Majorana fermions from Landau quantization in a superconductor-topological insulator hybrid structure, R.P. Tiwari 27.06.2013 Stuttgart, Germany Bruder Christoph; Tiwari Rakesh;
Research seminar Individual talk Optomechanics - Controlling mechanical motion with light and vice versa, A. Nunnenkamp 12.06.2013 Nottingham, Great Britain and Northern Ireland Bruder Christoph;
Research seminar Individual talk Optomechanics - Controlling mechanical motion with light and vice versa, A. Nunnenkamp 01.06.2013 Glasgow, Great Britain and Northern Ireland Bruder Christoph;
Swiss Nano Convention Poster Is an opto-mechanical system an eective Kerr medium? S. Aldana 23.05.2013 Basel, Switzerland Aldana Samuel; Bruder Christoph;
Swiss Nano Convention Poster Measuring ultrasmall time delays of light by joint weak measurements, G. Strübi 21.05.2013 Basel, Switzerland Strübi Grégory; Bruder Christoph;
Workshop Control of Complex Quantum Systems Talk given at a conference Quantum simulation of small-polaron formation with trapped ions, V. M. Stojanovic 28.03.2013 Santa Barbara, United States of America Bruder Christoph;
DPG Spring Meeting Talk given at a conference Measuring ultrasmall time delays of light by joint weak measurements, G. Strübi 13.03.2013 Regensburg, Germany Bruder Christoph; Strübi Grégory;
DPG spring meeting Talk given at a conference Majorana fermions from Landau quantization in a superconductor-topological insulator hybrid structure, R.P. Tiwari 12.03.2013 Regensburg, Germany Bruder Christoph; Tiwari Rakesh;
Workshop on Trends in Nanoscience 2013 Talk given at a conference Nano- and optomechanics, C. Bruder 27.02.2013 Irsee, Germany Bruder Christoph;
Research seminar Individual talk Optomechanics - Controlling mechanical motion with light and vice versa, A. Nunnenkamp 14.02.2013 Hamburg, Germany Bruder Christoph;
Tutorial at the workshop on Cavity Optomechanics Talk given at a conference Cavity Optomechanics, A. Nunnenkamp 11.02.2013 Diavolezza, Switzerland Bruder Christoph;
Research seminar Individual talk Cavity optomechanics in new regimes and with new devices, A. Nunnenkamp 10.01.2013 Cambridge, Great Britain and Northern Ireland Bruder Christoph;
Theoretical Physics Seminar Individual talk Polarons: from Models to Materials to Quantum Simulation, V. M. Stojanovic 11.12.2012 Geneva, Switzerland Bruder Christoph;
Research seminar at EPFL Individual talk Cavity optomechanics in new regimes and with new devices, A. Nunnenkamp 05.12.2012 Lausanne, Switzerland Bruder Christoph;
Theoretical Physics Colloquium Individual talk Polarons: from Models to Materials to Quantum Simulation, V. M. Stojanovic 26.11.2012 Konstanz, Germany Bruder Christoph;
Theoretical Physics Seminar Individual talk Polarons: from Models to Materials to Quantum Simulation, V. M. Stojanovic 15.11.2012 Cambridge, Great Britain and Northern Ireland Bruder Christoph;
Theory colloquium Individual talk Cavity optomechanics in the single-photon strong-coupling regime, A. Nunnenkamp 09.11.2012 Hannover, Germany Bruder Christoph;
Workshop on Quantum Noise and Measurement in Engineered Electronic Systems Talk given at a conference Synthetic gauge fields in Jaynes-Cummings-Hubbard ring lattices, A. Nunnenkamp 11.10.2012 Dresden, Germany Bruder Christoph;
Workshop on Quantum Noise and Measurement in Engineered Electronic Systems Talk given at a conference Interferometric and noise signatures of Majorana fermions, C. Bruder 10.10.2012 Dresden, Germany Bruder Christoph;
Quantum Noise and Measurement in Engineered Electronic Systems Poster Measuring ultrasmall time delays of light by joint weak measurements, G. Strübi 08.10.2012 Dresden, Germany Strübi Grégory; Bruder Christoph;
34th International Workshop on Condensed Matter Theories (CMT34) Talk given at a conference Quantum control of interacting qubits, invited talk C. Bruder 14.09.2012 Pohang, Korean Republic (South Korea) Bruder Christoph;
Swiss-Japanese Workshop on Current Topics in the Theory of Correlated Materials Talk given at a conference Interferometric and noise signatures of Majorana fermions, invited talk C. Bruder 12.09.2012 Wakoshi, Japan, Japan Bruder Christoph;
Summer School on Quantum and Non-Linear Optics (QNLO 2012) Talk given at a conference An introduction to cavity optomechanics, invited talk A. Nunnenkamp 29.08.2012 Sonderborg, Denmark Bruder Christoph;
Chemistry Department Seminar at Harvard University Individual talk Polarons: from models to materials to quantum simulation, talk V. M. Stojanovic 22.08.2012 Cambridge, MA, United States of America Bruder Christoph;
Workshop on Majorana Fermions in Condensed Matter Talk given at a conference Interferometric and noise signatures of Majorana fermions, invited talk C. Bruder 05.07.2012 Leiden, Netherlands Bruder Christoph;
Annual Meeting of the Swiss Physical Society 2012 Talk given at a conference Cavity optomechanics in the single-photon strong- coupling regime, invited talk A. Nunnenkamp 22.06.2012 Zürich, Switzerland Bruder Christoph;
AMOP Seminar Individual talk Cavity optomechanics in the single-photon strong-coupling regime, talk A. Nunnenkamp 24.05.2012 London, Great Britain and Northern Ireland Bruder Christoph;
AMOP Seminar Individual talk Cavity optomechanics in the single-photon strong-coupling regime, talk A. Nunnenkamp 22.05.2012 Cambridge, Great Britain and Northern Ireland Bruder Christoph;
Microkelvin Workshop 2012 Talk given at a conference Interferometric and noise signatures of Majorana fermions in transport experiments, invited talk C. Bruder 20.03.2012 Smolenice, Slovakia Bruder Christoph;
Gordon Conference Mechanical Systems in the Quantum Regime Talk given at a conference Strongly coupled and hybrid optomechanics, invited talk A. Nunnenkamp 08.03.2012 Galveston, TX, United States of America Bruder Christoph;
Quantum control Workshop Quantum Mechanics Talk given at a conference From Foundations to Quantum Information Science, invited talk C. Bruder 01.03.2012 Bielefeld, Germany Bruder Christoph;
2nd international SOLID workshop Talk given at a conference From quantum control to one-way quantum computing in interacting qubit arrays, invited talk V. M. Stojanovic 21.02.2012 Grenoble, France Bruder Christoph;
Special Seminar Individual talk Nonlinear optomechanics, talk A. Nunnenkamp 07.02.2012 Sheffield, Great Britain and Northern Ireland Bruder Christoph;
Special Seminar Individual talk Nonlinear optomechanics, talk A. Nunnenkamp 06.02.2012 Leeds, Great Britain and Northern Ireland Bruder Christoph;
NCCR QSIT General Meeting Poster GHZ generation protocol for superconducting qubits, (S. Aldana, Poster) 01.02.2012 Arosa, Switzerland Bruder Christoph; Aldana Samuel;
Workshop on Josephson Junction Circuits Talk given at a conference Effcient multi-qubit gates SOLID Topical, invited talk C. Bruder 17.01.2012 Delft, Netherlands Bruder Christoph;
SOLID JJ Workshop Poster GHZ generation protocol for superconducting qubits, (S. Aldana, Poster) 16.01.2012 Delft, Netherlands, Netherlands Bruder Christoph; Aldana Samuel;
Kolloquium Individual talk Quantum control of interacting qubits, invited talk C. Bruder 13.12.2011 Erlangen, Germany Bruder Christoph;
Workshop on Engineering and Control of Quantum Systems, Talk given at a conference Quantum-control approach to superconducting qubit arrays, talk V. M. Stojanovic 12.10.2011 Dresden, Germany Bruder Christoph;


Awards

Title Year
Rahel Heule received the Emilie-Louise-Frey-Award 2011 2011

Associated projects

Number Title Start Funding scheme
126637 Quantum coherence, quantum statistics, and superconductivity in mesoscopic systems 01.10.2009 Project funding (Div. I-III)
155933 Quantum coherence, quantum statistics, and superconductivity in mesoscopic systems 01.10.2014 Project funding (Div. I-III)

Abstract

We plan to investigate the possibility of generating entanglement between a nanomechanical oscillator and a quantum bit by controlling the time dependence of the current flowing through a quantum point contact coupled to both of them. We will study the possibility of realizing spin polarization effects using synthetic spin-orbit fields in an optical lattice. In addition, we will try to link abstract Kraus operators describing weak quantum measurements to physical detector models. We will study interferometric setups on topological insulators with the goal to find a direct signature of Majorana-type quasiparticles. Finally, we plan to propose realistic experimental schemes to prove the existence of entanglement at the output ports of a superconducting beam splitter.
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