Igor Boettcher

Group

• Igor Boettcher (head of group)
   
  
• Anffany Chen (Avadh Bhatia postdoctoral fellow)
   
  
• Canon Sun (postdoctoral fellow)
   
  
• Albion Arifi (PhD student)
   
  
• Adil Attar (MSc student)
   
  
• Current and past group members

Teaching

• PHYS 310 Thermodynamics and Kinetic Theory (Fall 2022)
   
  
• PHYS 530 Statistical Mechanics (Fall 2022)
   
  
• Lecture notes
   
  
• Current and past teaching

Condensed Matter Physics Research Seminar

• Schedule

Publications

1. "Hyperbolic matter in electrical circuits with tunable complex phases"
   Chen, Brand, Helbig, Hofmann, Imhof, Fritzsche, Kießling, Stegmaier, Upreti, Neupert, Bzdušek, Greiter, Thomale, Boettcher
   Nature Communications 14, 622 (2023), [arXiv:2205.05106]
    
   
2. "Hyperbolic Topological Band Insulators"
   Urwyler, Lenggenhager, Boettcher, Thomale, Neupert, Bzdušek
   Phys. Rev. Lett. 129, 246402 (2022), [arXiv:2203.07292]
    
   
3. "Selberg trace formula in hyperbolic band theory"
   Attar, Boettcher
   Phys. Rev. E 106, 034114 (2022), [arXiv:2201.06587]
    
   
4. "Universality of Hofstadter butterflies on hyperbolic lattices"
   Stegmaier, Upreti, Thomale, Boettcher
   Phys. Rev. Lett. 128, 166402 (2022), [arXiv:2111.05779]
    
   
5. "Simulating hyperbolic space on a circuit board"
   Lenggenhager, Stegmaier, Upreti, Hofmann, Helbig, Vollhardt, Greiter, Lee, Imhof, Brand, Kießling, Boettcher, Neupert, Thomale, Bzdušek
   Nature Communications 13, 4373 (2022), [arXiv:2109.01148]
    
   
6. "Circuit Quantum Electrodynamics in Hyperbolic Space: From Photon Bound States to Frustrated Spin Models"
   Bienias, Boettcher, Belyansky, Kollár, Gorshkov
   Phys. Rev. Lett. 128, 013601 (2022), [arXiv:2105.06490]
   Press release JQI News
    
   
7. "Crystallography of hyperbolic lattices"
   Boettcher, Gorshkov, Kollár, Maciejko, Rayan, Thomale
   Phys. Rev. B 105, 125118 (2022), [arXiv:2105.01087]
   Editors' Suggestion
    
   
8. "Protocols for estimating multiple functions with quantum sensor networks: geometry and performance"
   Bringewatt, Boettcher, Niroula, Bienias, Gorshkov
   Phys. Rev. Research 3, 033011 (2021), [arXiv:2104.09540]
    
   
9. "Topological defect engineering and PT-symmetry in non-Hermitian electrical circuits"
   Stegmaier, Imhof, Helbig, Hofmann, Lee, Kremer, Fritzsche, Feichtner, Klembt, Hoefling, Boettcher, Fulga, Schmidt, Greiter, Kiessling, Szameit, Thomale
   Phys. Rev. Lett. 126, 215302 (2021), [arXiv:2011.14836]
    
   
10. "Optimal Measurement of Field Properties with Quantum Sensor Networks"
    Qian, Bringewatt, Boettcher, Bienias, Gorshkov
    Phys. Rev. A 103, L030601 (2021), [arXiv:2011.01259]
    Letter
     
    
11. "Infrared fixed points of higher-spin fermions in topological semimetals"
    Boettcher
    Phys. Rev. B 102, 155104 (2020), [arXiv:2007.03740]
     
    
12. "Critical theory for the breakdown of photon blockade"
    Curtis, Boettcher, Young, Maghrebi, Carmichael, Gorshkov, Foss-Feig
    Phys. Rev. Research 3, 023062 (2021), [arXiv:2006.05593]
     
    
13. "d-wave superconductivity and Bogoliubov-Fermi surfaces in Rarita-Schwinger-Weyl semimetals"
    Link, Boettcher, Herbut
    Phys. Rev. B 101, 184503 (2020), [arXiv:2001.09224]
    Editors' Suggestion
     
    
14. "Quantum Simulation of Hyperbolic Space with Circuit Quantum Electrodynamics: From Graphs to Geometry"
    Boettcher, Bienias, Belyanksy, Kollár, Gorshkov
    Phys. Rev. A 102, 032208 (2020), [arXiv:1910.12318]
    Editors' Suggestion
    Featured in Physics, Press release JQI News
     
    
15. "Interplay of topology and electron-electron interactions in Rarita-Schwinger-Weyl semimetals"
    Boettcher
    Phys. Rev. Lett. 124, 127602 (2020), [arXiv:1907.05354]
    On the Cover
    Press release JQI News
     
    
16. "Ground state of the three-dimensional BCS d-wave superconductor"
    Herbut, Boettcher, Mandal
    Phys. Rev. B 100, 104503 (2019), [arXiv:1907.05015]
     
    
17. "Optical response of Luttinger semimetals in the normal and superconducting states"
    Boettcher
    Phys. Rev. B 99, 125146 (2019), [arXiv:1812.07555]
     
    
18. "Critical phenomena at the complex tensor ordering phase transition"
    Boettcher, Herbut
    Phys. Rev. B 97, 064504 (2018), [arXiv:1712.03981]
     
    
19. "Unconventional Superconductivity in Luttinger Semimetals: Theory of Complex Tensor Order and the Emergence of the Uniaxial Nematic State"
    Boettcher, Herbut
    Phys. Rev. Lett. 120, 057002 (2018), [arXiv:1707.03444]
    Press release Simon Fraser University
     
    
20. "High temperature pairing in a strongly interacting two-dimensional Fermi gas"
    Murthy, Neidig, Klemt, Bayha, Boettcher, Enss, Holten, Zürn, Preiss, Jochim
    Science 359, 452 (2018), [arXiv:1705.10577]
    Press release Heidelberg University
     
    
21. "Anisotropy induces non-Fermi-liquid behavior and nematic magnetic order in three-dimensional Luttinger semimetals"
    Boettcher, Herbut
    Phys. Rev. B 95, 075149 (2017), [arXiv:1611.05904]
    Editors' Suggestion
     
    
22. "Quasi-long-range order in trapped two-dimensional Bose gases"
    Boettcher, Holzmann
    Phys. Rev. A 94, 011602(R) (2016), [arXiv:1605.00597]
    Rapid Communication
     
    
23. "Dimensional crossover of nonrelativistic bosons"
    Lammers, Boettcher, Wetterich
    Phys. Rev. A 93, 063631 (2016), [arXiv:1603.02409]
     
    
24. "Superconducting quantum criticality in three-dimensional Luttinger semimetals"
    Boettcher, Herbut
    Phys. Rev. B 93, 205138 (2016), [arXiv:1603.00031]
     
    
25. "Equation of State of Ultracold Fermions in the 2D BEC-BCS Crossover Region"
    Boettcher, Bayha, Kedar, Murthy, Neidig, Ries, Wenz, Zürn, Jochim, Enss
    Phys. Rev. Lett. 116, 045303 (2016), [arXiv:1509.03610]
    Editors' Suggestion
    Featured in Physics, Press release Heidelberg University
     
    
26. "Observation of the Berezinskii-Kosterlitz-Thouless Phase Transition in an Ultracold Fermi Gas"
    Murthy, Boettcher, Bayha, Holzmann, Kedar, Neidig, Ries, Wenz, Zürn, Jochim
    Phys. Rev. Lett. 115, 010401 (2015), [arXiv:1505.02123]
    Editors' Suggestion
     
    
27. "Scaling relations and multicritical phenomena from Functional Renormalization"
    Boettcher
    Phys. Rev. E 91, 062112 (2015), [arXiv:1503.07817]
     
    
28. "Observation of Pair Condensation in the Quasi-2D BEC-BCS Crossover"
    Ries, Wenz, Zürn, Bayha, Boettcher, Kedar, Murthy, Neidig, Lompe, Jochim
    Phys. Rev. Lett. 114, 230401 (2015), [arXiv:1409.5373]
    Editors' Suggestion
    Featured in Physics, Press release Heidelberg University
     
    
29. "Sarma phase in relativistic and non-relativistic systems "
    Boettcher, Herbst, Pawlowski, Strodthoff, von Smekal, Wetterich
    Phys. Lett. B 742, 86 (2015), [arXiv:1409.5232]
     
    
30. "Phase structure of spin-imbalanced unitary Fermi gases"
    Boettcher, Braun, Herbst, Pawlowski, Roscher, Wetterich
    Phys. Rev. A 91, 013610 (2015), [arXiv:1409.5070]
     
    
31. "Critical temperature and superfluid gap of the Unitary Fermi Gas from Functional Renormalization"
    Boettcher, Pawlowski, Wetterich
    Phys. Rev. A 89, 053630 (2014), [arXiv:1312.0505]
     
    
32. "Error estimates and specification parameters for functional renormalization"
    Schnoerr, Boettcher, Pawlowski, Wetterich
    Annals Phys. 334 (2013) 83-99, [arXiv:1301.4169]
     
    
33. "Tan contact and universal high momentum behavior of the fermion propagator in the BCS-BEC crossover"
    Boettcher, Diehl, Pawlowski, Wetterich
    Phys. Rev. A 87, 023606 (2013), [arXiv:1209.5641]
     
    
34. "Ultracold atoms and the Functional Renormalization Group"
    Boettcher, Pawlowski, Diehl
    Nucl. Phys. B (Proc. Suppl.) 228 (2012) 63-135, [arXiv:1204.4394]
     
    
35. "Hydrodynamic collective modes for cold trapped gases"
    Boettcher, Floerchinger, Wetterich
    J. Phys. B: At. Mol. Opt. Phys. 44 (2011) 235301, [arXiv:1103.5342]
     
    

summaries of selected articles for non-scientists

Theses

• Doctoral thesis "Dimensional BCS-BEC crossover in ultracold Fermi gases" (Heidelberg University, 2014) under the supervision of C. Wetterich
   
  
• Diploma thesis "Precision observables for ultracold quantum gases" (Heidelberg University, 2011) under the supervision of C. Wetterich

Honors

• Otto-Haxel-Prize 2011 for the diploma thesis "Precision observables for ultracold quantum gases", awarded by the Faculty of Physics and Astronomy, Heidelberg University