DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Detecting Weak Coupling of Quantum Systems with a Nonequilibrium Fano Resonance

Abstract

A critical aspect of quantum mechanics is the nonlocal nature of the wavefunction, a characteristic that may yield unexpected coupling of nominally-isolated systems. The capacity to detect this coupling can be vital in many situations, especially those in which its strength is weak. In this work we address this problem in the context of mesoscopic physics, by implementing an electron-wave realization of a Fano interferometer using pairs of coupled quantum point contacts (QPCs). Within this scheme, the discrete level required for a Fano resonance is provided by pinching off one of the QPCs, thereby inducing the formation of a quasi-bound state at the center of its self-consistent potential barrier. Using this system, we demonstrate a form of $$\textit{nonequilibrium}$$ Fano resonance (NEFR), in which nonlinear electrical biasing of the interferometer gives rise to pronounced distortions of its Fano resonance. Our experimental results are captured well by a quantitative theoretical model, which considers a system in which a standard two-path Fano interferometer is coupled to an additional, $$\textit{intruder}$$, continuum. According to this theory, the observed distortions in the Fano resonance arise $$\textit{only}$$ in the presence of coupling to the intruder, indicating that the NEFR provides a sensitive means to infer the presence of weak coupling between mesoscopic systems.

Authors:
 [1];  [1];  [1];  [2];  [3];  [3];  [4];  [5]
  1. Univ. at Buffalo, the State Univ. of New York, Buffalo, NY (United States)
  2. Univ. at Buffalo, the State Univ. of New York, Buffalo, NY (United States); Chiba Univ., Chiba (Japan)
  3. Chiba Univ., Chiba (Japan)
  4. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  5. Uppsala Univ., Uppsala (Sweden)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1512879
Alternate Identifier(s):
OSTI ID: 1249724
Report Number(s):
SAND-2015-9047J
Journal ID: ISSN 2469-9950; PRBMDO; 664884
Grant/Contract Number:  
AC04-94AL85000; FG02-04ER46180
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 93; Journal Issue: 16; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Xiao, S., Yoon, Y., Lee, Y. -H., Bird, J. P., Ochiai, Y., Aoki, N., Reno, John L., and Fraansson, J. Detecting Weak Coupling of Quantum Systems with a Nonequilibrium Fano Resonance. United States: N. p., 2016. Web. doi:10.1103/PhysRevB.93.165435.
Xiao, S., Yoon, Y., Lee, Y. -H., Bird, J. P., Ochiai, Y., Aoki, N., Reno, John L., & Fraansson, J. Detecting Weak Coupling of Quantum Systems with a Nonequilibrium Fano Resonance. United States. https://doi.org/10.1103/PhysRevB.93.165435
Xiao, S., Yoon, Y., Lee, Y. -H., Bird, J. P., Ochiai, Y., Aoki, N., Reno, John L., and Fraansson, J. Mon . "Detecting Weak Coupling of Quantum Systems with a Nonequilibrium Fano Resonance". United States. https://doi.org/10.1103/PhysRevB.93.165435. https://www.osti.gov/servlets/purl/1512879.
@article{osti_1512879,
title = {Detecting Weak Coupling of Quantum Systems with a Nonequilibrium Fano Resonance},
author = {Xiao, S. and Yoon, Y. and Lee, Y. -H. and Bird, J. P. and Ochiai, Y. and Aoki, N. and Reno, John L. and Fraansson, J.},
abstractNote = {A critical aspect of quantum mechanics is the nonlocal nature of the wavefunction, a characteristic that may yield unexpected coupling of nominally-isolated systems. The capacity to detect this coupling can be vital in many situations, especially those in which its strength is weak. In this work we address this problem in the context of mesoscopic physics, by implementing an electron-wave realization of a Fano interferometer using pairs of coupled quantum point contacts (QPCs). Within this scheme, the discrete level required for a Fano resonance is provided by pinching off one of the QPCs, thereby inducing the formation of a quasi-bound state at the center of its self-consistent potential barrier. Using this system, we demonstrate a form of $\textit{nonequilibrium}$ Fano resonance (NEFR), in which nonlinear electrical biasing of the interferometer gives rise to pronounced distortions of its Fano resonance. Our experimental results are captured well by a quantitative theoretical model, which considers a system in which a standard two-path Fano interferometer is coupled to an additional, $\textit{intruder}$, continuum. According to this theory, the observed distortions in the Fano resonance arise $\textit{only}$ in the presence of coupling to the intruder, indicating that the NEFR provides a sensitive means to infer the presence of weak coupling between mesoscopic systems.},
doi = {10.1103/PhysRevB.93.165435},
journal = {Physical Review B},
number = 16,
volume = 93,
place = {United States},
year = {Mon Apr 25 00:00:00 EDT 2016},
month = {Mon Apr 25 00:00:00 EDT 2016}
}

Journal Article:

Citation Metrics:
Cited by: 5 works
Citation information provided by
Web of Science

Save / Share:

Works referenced in this record:

Quantum Computation and Quantum Information
book, January 2011


Effects of Configuration Interaction on Intensities and Phase Shifts
journal, December 1961


Fano resonances in nanoscale structures
journal, August 2010

  • Miroshnichenko, Andrey E.; Flach, Sergej; Kivshar, Yuri S.
  • Reviews of Modern Physics, Vol. 82, Issue 3
  • DOI: 10.1103/RevModPhys.82.2257

The Fano resonance in plasmonic nanostructures and metamaterials
journal, August 2010

  • Luk'yanchuk, Boris; Zheludev, Nikolay I.; Maier, Stefan A.
  • Nature Materials, Vol. 9, Issue 9
  • DOI: 10.1038/nmat2810

Coherence and spin effects in quantum dots
journal, May 2007


Fano resonances in electronic transport through a single-electron transistor
journal, July 2000


Tuning of the Fano Effect through a Quantum Dot in an Aharonov-Bohm Interferometer
journal, June 2002


Fano resonances in open quantum dots and their application as spin filters
journal, June 2003

  • Song, J. F.; Ochiai, Y.; Bird, J. P.
  • Applied Physics Letters, Vol. 82, Issue 25
  • DOI: 10.1063/1.1586788

Symmetry Breaking in Plasmonic Nanocavities: Subradiant LSPR Sensing and a Tunable Fano Resonance
journal, November 2008

  • Hao, Feng; Sonnefraud, Yannick; Dorpe, Pol Van
  • Nano Letters, Vol. 8, Issue 11
  • DOI: 10.1021/nl802509r

Fano Resonances in Individual Coherent Plasmonic Nanocavities
journal, April 2009

  • Verellen, Niels; Sonnefraud, Yannick; Sobhani, Heidar
  • Nano Letters, Vol. 9, Issue 4
  • DOI: 10.1021/nl9001876

Intrinsic Fano Interference of Localized Plasmons in Pd Nanoparticles
journal, February 2009

  • Pakizeh, Tavakol; Langhammer, Christoph; Zorić, Igor
  • Nano Letters, Vol. 9, Issue 2
  • DOI: 10.1021/nl803794h

Planar Metamaterial Analogue of Electromagnetically Induced Transparency for Plasmonic Sensing
journal, April 2010

  • Liu, Na; Weiss, Thomas; Mesch, Martin
  • Nano Letters, Vol. 10, Issue 4
  • DOI: 10.1021/nl902621d

Metamaterials: Optical Activity without Chirality
journal, March 2009


Metamaterial with polarization and direction insensitive resonant transmission response mimicking electromagnetically induced transparency
journal, May 2009

  • Papasimakis, N.; Fu, Y. H.; Fedotov, V. A.
  • Applied Physics Letters, Vol. 94, Issue 21
  • DOI: 10.1063/1.3138868

Fano-resonant asymmetric metamaterials for ultrasensitive spectroscopy and identification of molecular monolayers
journal, November 2011

  • Wu, Chihhui; Khanikaev, Alexander B.; Adato, Ronen
  • Nature Materials, Vol. 11, Issue 1, p. 69-75
  • DOI: 10.1038/nmat3161

Graphene-Antenna Sandwich Photodetector
journal, June 2012

  • Fang, Zheyu; Liu, Zheng; Wang, Yumin
  • Nano Letters, Vol. 12, Issue 7
  • DOI: 10.1021/nl301774e

Biochemical sensors based on polymer microrings with sharp asymmetrical resonance
journal, August 2003

  • Chao, Chung-Yen; Guo, L. Jay
  • Applied Physics Letters, Vol. 83, Issue 8
  • DOI: 10.1063/1.1605261

The nonlinear Fano effect
journal, January 2008


Robust quantum coherence above the Fermi sea
journal, January 2016


Tuning the Fano Resonance with an Intruder Continuum
journal, January 2014

  • Fransson, J.; Kang, M. -G.; Yoon, Y.
  • Nano Letters, Vol. 14, Issue 2
  • DOI: 10.1021/nl404133d

Local Moment Formation in Quantum Point Contacts
journal, January 2003


Magnetic impurity formation in quantum point contacts
journal, August 2006


Localization in an inhomogeneous quantum wire
journal, November 2009


Ferromagnetically Coupled Magnetic Impurities in a Quantum Point Contact
journal, February 2011


Localization of electrons and formation of two-dimensional Wigner spin lattices in a special cylindrical semiconductor stripe
journal, August 2010


Low-Temperature Fate of the 0.7 Structure in a Point Contact: A Kondo-like Correlated State in an Open System
journal, May 2002


Zero-bias anomaly of quantum point contacts in the low-conductance limit
journal, July 2010


Observation of the Kondo Effect in a Spin- 3 2 Hole Quantum Dot
journal, August 2011


Evidence for the formation of quasibound states in an asymmetrical quantum point contact
journal, February 2012


Odd and even Kondo effects from emergent localization in quantum point contacts
journal, August 2013


PHYSICS: Electron Spin Polarization in Nanoscale Constrictions
journal, March 2004


Probing the Microscopic Structure of Bound States in Quantum Point Contacts
journal, September 2007


Detector backaction on the self-consistent bound state in quantum point contacts
journal, March 2009


Coupling Quantum States through a Continuum: A Mesoscopic Multistate Fano Resonance
journal, April 2012


Detection of Local-Moment Formation Using the Resonant Interaction between Coupled Quantum Wires
journal, March 2004


Experimental Test of the Quantum Shot Noise Reduction Theory
journal, April 1996


Experimental Test of the High-Frequency Quantum Shot Noise Theory in a Quantum Point Contact
journal, December 2007


Current-voltage spectroscopy of the subband structure of strongly pinched-off quantum point contacts
journal, December 2009

  • Song, J.; Mikalopas, J.; Aizin, G. R.
  • Applied Physics Letters, Vol. 95, Issue 23
  • DOI: 10.1063/1.3272677

Fano resonance in a quantum wire with a side-coupled quantum dot
journal, July 2004


A Gate-Controlled Bidirectional Spin Filter Using Quantum Coherence
journal, January 2003


Tunneling spectroscopy of a ballistic quantum wire
journal, July 2008


Quantum theory of the nonlinear Fano effect in hybrid metal-semiconductor nanostructures: The case of strong nonlinearity
journal, August 2011


Optical Realization of Double-Continuum Fano Interference and Coherent Control in Plasmonic Metasurfaces
journal, June 2015


Fano-Liouville Spectral Signatures in Open Quantum Systems
journal, September 2015


Electronic Magnetization of a Quantum Point Contact Measured by Nuclear Magnetic Resonance
journal, July 2015


Universal formalism of Fano resonance
journal, January 2015

  • Huang, Liang; Lai, Ying-Cheng; Luo, Hong-Gang
  • AIP Advances, Vol. 5, Issue 1
  • DOI: 10.1063/1.4906797

Works referencing / citing this record:

Fano resonance in a subwavelength Mie-based metamolecule with split ring resonator
journal, June 2017

  • Wang, Xiaobo; Zhou, Ji
  • Applied Physics Letters, Vol. 110, Issue 25
  • DOI: 10.1063/1.4989527

Resonances in open quantum systems
journal, February 2017


Ubiquity of Beutler-Fano profiles: From scattering to dissipative processes
journal, February 2018