Working Group Theory of Quantum State Engineering and Quantum Information


Head: Prof. Dr. Alexander Shnirman

We study

  • Quantum state engineering in Josephson and spin systems
  • Microscopic decoherence sources in Josephson and spin qubits
  • Geometric phases and geometric pumping
  • Charge solitons in one-dimensional Josephson arrays

More information

 

Publications

(1)   D. S. Shapiro et al., Microwave response of a chiral Majorana interferometer, Phys. Rev. B 104 (2021) 35434
(2)   J. D. Brehm et al., Tunable Anderson localization of dark states, Phys. Rev. B 104 (2021) 174202
(3)   S. Backens et al., Current-phase relation in a topological Josephson junction: Andreev bands versus scattering states, Phys. Rev. B 103 (2021) 115423
(4)   Yu. Makhlin et al., Quantum-state engineering with Josephson-junction devices, Rev. Mod. Phys. 73 (2001) 357

 

Members (in alphabetical order)
Name Tel
+49
-721
-608 		Bld.-Room E-Mail
Piasotski, Kiryl
30.23-0
kiryl piasotskiGgn9∂kit edu
Shenoy, Varna
30.23-0
varna shenoyGgn9∂kit edu
Shnirman, Alexander 32767
30.23-10.05
alexander shnirmanGgn9∂kit edu

Recent Publications


Solomon equations for qubit and two-level systems: Insights into non-Poissonian quantum jumps
Spiecker, M.; Pavlov, A. I.; Shnirman, A.; Pop, I. M.
2024. Physical Review A, 109 (5), Article no: 052218. doi:10.1103/PhysRevA.109.052218
Qubit dephasing by spectrally diffusing quantum two-level systems
Matityahu, S.; Shnirman, A.; Schechter, M.
2024. Physical Review Applied, 21 (4), Art.-Nr.: 044055. doi:10.1103/PhysRevApplied.21.044055
Mitigating crosstalk errors by randomized compiling: Simulation of the BCS model on a superconducting quantum computer
Perrin, H.; Scoquart, T.; Shnirman, A.; Schmalian, J.; Snizhko, K.
2024. Physical Review Research, 6, Article no: 013142. doi:10.1103/PhysRevResearch.6.013142
Green’s functions of quasi-one-dimensional layered systems and their application to Josephson junctions
Piasotski, K.; Pletyukhov, M.; Shnirman, A.
2024. Physical Review B, 109 (1), Art.-Nr.: 014201. doi:10.1103/PhysRevB.109.014201
Two-level system hyperpolarization using a quantum Szilard engine
Spiecker, M.; Paluch, P.; Gosling, N.; Drucker, N.; Matityahu, S.; Gusenkova, D.; Günzler, S.; Rieger, D.; Takmakov, I.; Valenti, F.; Winkel, P.; Gebauer, R.; Sander, O.; Catelani, G.; Shnirman, A.; Ustinov, A. V.; Wernsdorfer, W.; Cohen, Y.; Pop, I. M.
2023. Nature Physics, 19, 1320–1325. doi:10.1038/s41567-023-02082-8
Magnetization dynamics and Peierls instability in topological Josephson structures
Reich, A.; Berg, E.; Schmalian, J.; Shnirman, A.
2023. Physical Review B, 107 (24), Art.-Nr.: 245411. doi:10.1103/PhysRevB.107.245411
Coulomb blockade of chiral Majorana and complex fermions far from equilibrium
Shapiro, D. S.; Mirlin, A. D.; Shnirman, A.
2023. Physical Review B, 107 (12), Art.-Nr.: 125404. doi:10.1103/PhysRevB.107.125404
Topological Josephson Junction in Transverse Magnetic Field
Backens, S.; Shnirman, A.; Makhlin, Y.
2022. JETP Letters, 116 (12), 891–895. doi:10.1134/S0021364022602561
Stabilization of Qubit Relaxation Rates by Frequency Modulation
Matityahu, S.; Shnirman, A.; Schechter, M.
2021. Physical Review Applied, 16 (4), Art. Nr.: 044036. doi:10.1103/PhysRevApplied.16.044036
Tunable Anderson localization of dark states
Brehm, J. D.; Pöpperl, P.; Mirlin, A. D.; Shnirman, A.; Stehli, A.; Rotzinger, H.; Ustinov, A. V.
2021. Physical Review B, 104 (17), Art.-Nr.: 174202. doi:10.1103/PhysRevB.104.174202
Microwave response of a chiral Majorana interferometer
Shapiro, D. S.; Mirlin, A. D.; Shnirman, A.
2021. Physical Review B, 104 (3), Art.-Nr.: 035434. doi:10.1103/PhysRevB.104.035434
Acoustic properties of metallic glasses at low temperatures: Tunneling systems and their dephasing
Meißner, A.; Voigtländer, T.; Meißner, S. M.; Kühn, U.; Schneider, S.; Shnirman, A.; Weiss, G.
2021. Physical Review B, 103 (22), 224209. doi:10.1103/PhysRevB.103.224209
Current-phase relation in a topological Josephson junction: Andreev bands versus scattering states
Backens, S.; Shnirman, A.
2021. Physical Review B, 103 (11), Art.-Nr.: 115423. doi:10.1103/PhysRevB.103.115423
Polaronic effect of a metal layer on variable range hopping
Asban, O.; Burin, A.; Shnirman, A.; Schechter, M.
2021. Physical review / B, 103 (4), Art.-Nr: 045129. doi:10.1103/PhysRevB.103.045129
Mesoscopic Stoner Instability in Open Quantum Dots: Suppression of Coleman-Weinberg Mechanism by Electron Tunneling
Burmistrov, I. S.; Gefen, Y.; Shapiro, D. S.; Shnirman, A.
2020. Physical review letters, 124 (19), Art. Nr.: 196801. doi:10.1103/PhysRevLett.124.196801