Zaki Leghtas

Last update: Nov 4th 2024

Contact

  • Address: Laboratoire de physique, Ecole Normale Supérieure, 24 rue Lhomond 75005 Paris.
  • Email: zaki.leghtas_thatcurlysymbol_ens.fr
  • Website: quantic.phys.ens.fr

Current positions

Curriculum vitae (pdf)

  • Professorship at Mines Paris: December 2022
  • Research Direction Habilitation from ENS Paris: Nov 2020
  • ERC starting grant 2019 -
  • Post doctoral researcher at Yale University in the group of Michel Devoret: Nov 2012 - Oct 2015
  • PhD in applied mathematics and control theory, under the supervision of Pierre Rouchon and Mazyar Mirrahimi, Mines Paris: Sep 2009 to Sep 2012
  • Student at Mines Paris, cycle ingenieur civil, Sep 2006 to Jul 2009
  • Classes preparatoires, Sep 2004 to Jul 2006

Publications

    2024
  1. Mixing of counterpropagating signals in a traveling-wave Josephson device. Matthieu Praquin, Vincent Lienhard, Anthony Giraudo, Aron Vanselow, Zaki Leghtas, Philippe Campagne-Ibarcq. Preprint: arXiv:2406.19751
    2. 2023
  2. Spectral signature of high-order photon processes mediated by Cooper-pair pairing. W. C. Smith, A. Borgognoni, M. Villiers, E. Roverc'h, J. Palomo, M. R. Delbecq, T. Kontos, P. Campagne-Ibarcq, B. Doucot and Z. Leghtas. Preprint: arXiv:2312.15075
  3. High-sensitivity AC-charge detection with a MHz-frequency fluxonium qubit. B.-L. Najera-Santos, R. Rousseau, K. Gerashchenko, H. Patange, A. Riva, M. Villiers, T. Briant, P.-F. Cohadon, A. Heidmann, J. Palomo, M. Rosticher, H. le Sueur, A. Sarlette, W. C. Smith, Z. Leghtas, E. Flurin, T. Jacqmin, S. Deleglise. Phys. Rev. X 14, 011007 . Preprint: arXiv:2307.14329
  4. Quantum control of a cat-qubit with bit-flip times exceeding ten seconds. Ulysse Reglade, Adrien Bocquet, Ronan Gautier, Antoine Marquet, Emanuele Albertinale, Natalia Pankratova, Mattis Hallen, Felix Rautschke, Lev-Arcady Sellem, Pierre Rouchon, Alain Sarlette, Mazyar Mirrahimi, Philippe Campagne-Ibarcq, Raphael Lescanne, Sebastien Jezouin, Zaki Leghtas. Nature volume 629, pages 778-783 (2024) . Preprint: arXiv:2307.06617
  5. A GKP qubit protected by dissipation in a high-impedance superconducting circuit driven by a microwave frequency comb.
    Lev-Arcady Sellem, Alain Sarlette, Zaki Leghtas, Mazyar Mirrahimi, Pierre Rouchon, Philippe Campagne-Ibarcq.
    Preprint: arXiv:2304.01425
  6. Observation of Josephson Harmonics in Tunnel Junctions. Dennis Wilsch et al. Nature Physics 20, 815 (2024)
    Preprint: arXiv:2302.09192
    7. 2022
  7. High-performance repetition cat code using fast noisy operations. F-M Le Regent, C. Berdou, Z. Leghtas, J. Guillaud, M. Mirrahimi. Quantum 7, 1198 (2023)
    Preprint: arXiv:2212.11927
  8. Dynamically enhancing qubit-photon interactions with anti-squeezing.
    M. Villiers, W. C. Smith, A. Petrescu, A. Borgognoni, M. Delbecq, A. Sarlette, M. Mirrahimi, P. Campagne-Ibarcq, T. Kontos, Z. Leghtas. PRX Quantum 5, 020306
    Preprint: arXiv:2212.04991
  9. One hundred second bit-flip time in a two-photon dissipative oscillator.
    C. Berdou, A. Murani, U. Reglade, W. C. Smith, M. Villiers, J. Palomo, M. Rosticher, A. Denis, P. Morfin, M. Delbecq, T. Kontos, N. Pankratova, F. Rautschke, T. Peronnin, L.-A. Sellem, P. Rouchon, A. Sarlette, M. Mirrahimi, P. Campagne-Ibarcq, S. Jezouin, R. Lescanne, Z. Leghtas. PRX Quantum 4, 020350 (pdf)
    10. 2021
  10. Vacuum-field-induced THz transport gap in a carbon nanotube quantum dot. F Valmorra, K Yoshida, LC Contamin, Simon Messelot, S Massabeau, MR Delbecq, MC Dartiailh, MM Desjardins, T Cubaynes, Zaki Leghtas, K Hirakawa, Jerome Tignon, Sukhdeep Dhillon, Sebastien Balibar, Juliette Mangeney, Audrey Cottet, Takis Kontos. Nature communications 12 (1), 1-8. (main)
  11. Multiplexed photon number measurement. Antoine Essig, Quentin Ficheux, Theau Peronnin, Nathanael Cottet, Raphael Lescanne, Alain Sarlette, Pierre Rouchon, Zaki Leghtas, Benjamin Huard. Physical Review X 11 (3), 031045. (main)
  12. Z. K. Minev, Z. Leghtas, S. O. Mundhada, L. Christakis, I. M. Pop, M. H. Devoret. Energy-participation quantization of Josephson circuits. npj Quantum Information volume 7, Article number: 131 (2021). (main)
    13. 2020
  13. W.C. Smith, M. Villiers, A. Marquet, J. Palomo, M.R. Delbecq, T. Kontos, P. Campagne-Ibarcq, B. Doucot and Z. Leghtas. Magnifying quantum phase fluctuations with Cooper-pair pairing. Phys. Rev. X 12, 021002. preprint: arXiv:2010.15488 (2020).
    14. 2019
  14. A. Cottet, Z. Leghtas and Takis Kontos. Theory of interactions between cavity photons induced by a mesoscopic circuit. Phys. Rev. B 102, 155105 (2020) preprint: arXiv:1910.07801 (2019). (main)
  15. R. Lescanne, M. Villiers, T. Peronnin, A. Sarlette, M. Delbecq, B. Huard, T. Kontos, M. Mirrahimi, Z. Leghtas. Exponential suppression of bit-flips in a qubit encoded in an oscillator. Nature Physics (2020) . preprint arXiv:1907.11729 (2019). (main)
  16. R. Lescanne, S. Deleglise, E. Albertinale, U. Reglade, T. Capelle, E. Ivanov, T. Jacqmin, Z. Leghtas and E. Flurin. Irreversible Qubit-Photon Coupling for the Detection of Itinerant Microwave Photons. PRX 10, 021038 (2020) . preprint arXiv:1902.05102 (2019). (main)
  17. Lucas Verney, Raphael Lescanne, Michel H. Devoret, Zaki Leghtas, Mazyar Mirrahimi. Structural instability of driven Josephson circuits prevented by an inductive shunt. Phys. Rev. Applied 11, 024003 (2019). (main)
  18. Raphael Lescanne, Lucas Verney, Quentin Ficheux, Michel H. Devoret, Benjamin Huard, Mazyar Mirrahimi, Zaki Leghtas. Observing the escape of a driven quantum Josephson circuit into unconfined states. Phys. Rev. Applied 11, 014030 (2019). (main)
  19. T. Cubaynes, M. R. Delbecq, M. C. Dartiailh, R. Assouly, M. M. Desjardins, L. C. Contamin, L. E. Bruhat, Z. Leghtas, F. Mallet, A. Cottet and T. Kontos. Highly coherent spin states in carbon nanotubes coupled to cavity photons. NPJ Quantum Informationvolume 5, Article number: 47 (2019). (main)
    20. 2018
  20. D. Markovic, S. Jezouin, Q. Ficheux, S. Fedortchenko, S. Felicetti, T. Coudreau, P. Milman, Z. Leghtas and B. Huard. Demonstration of an effective ultrastrong coupling between two oscillators. Phys. Rev. Lett. 121, 040505 (2018) (main)
  21. E. Zalys-Geller, A. Narla, S. Shankar, M. Hatridge, M. P. Silveri, K. Sliwa, Z. Leghtas, M. H. Devoret. Generation of discord through a remote joint continuous variable measureme. Submitted. (main)
  22. Q. Ficheux, S. Jezouin, Z. Leghtas, B. Huard. Dynamics of a qubit while simultaneously monitoring its relaxation and dephasing. Nature Communcations 9, Article number: 1926 (2018). (main)
  23. S. Touzard, A. Grimm, Z. Leghtas, S.O. Mundhada, P. Reinhold, R. Heeres, C. Axline, M. Reagor, K. Chou, J. Blumoff, K.M. Sliwa, S. Shankar, L. Frunzio, R.J. Schoelkopf, M. Mirrahimi, M.H. Devoret. Coherent oscillations inside a quantum manifold stabilized by dissipation. Phys. Rev. X 8, 021005 (2018). (main)
    24. 2016
  24. A. Narla, S. Shankar, M. Hatridge, Z. Leghtas, K. M. Sliwa, E. Zalys-Geller, S. O. Mundhada, W. Pfaff, L. Frunzio, R. J. Schoelkopf, M. H. Devoret. Robust concurrent remote entanglement between two superconducting qubits. Phys. Rev. X 6, 031036 (2016). (main)
  25. Nissim Ofek, Andrei Petrenko, Reinier Heeres, Philip Reinhold, Zaki Leghtas, Brian Vlastakis, Yehan Liu, Luigi Frunzio, S. M. Girvin, Liang Jiang, Mazyar Mirrahimi, M. H. Devoret, R. J. Schoelkopf. Demonstrating Quantum Error Correction that Extends the Lifetime of Quantum Information. Nature 536, 445 (2016). (main)
  26. Z.K. Minev, K. Serniak, I.M. Pop, Z. Leghtas, K. Sliwa, M. Hatridge, L. Frunzio, R. J. Schoelkopf, M. H. Devoret. Planar multilayer circuit quantum electrodynamics. Phys. Rev. Applied 5, 044021 (2016) (main)
  27. Matti Silveri, Evan Zalys-Geller, Michael Hatridge, Zaki Leghtas, Michel H. Devoret, and S. M. Girvin. Theory of remote entanglement via quantum-limited phase-preserving amplification. Phys. Rev. A 93, 062310 (2016) (main)
    28. 2015
  28. B. Vlastakis, A. Petrenko, N. Ofek, L. Sun, Z. Leghtas, K. Sliwa, Y. Liu, M. Hatridge, J. Blumoff, L. Frunzio, M. Mirrahimi, L. Jiang, M.H. Devoret and R.J. Schoelkopf. Nature communications, 6, 8970, 2015 (main)
  29. A.Roy, Z.Leghtas, A.D. Stone, M.Devoret, and M.Mirrahimi. Continuous generation and stabilization of mesoscopic field superposition states in a quantum circuit. Physical Review A, 91(1):013810, January 2015. (main)
  30. Z.Leghtas, S.Touzard, I.M. Pop, A.Kou, B.Vlastakis, A.Petrenko, K.M. Sliwa, A.Narla, S.Shankar, M.J. Hatridge, M.Reagor, L.Frunzio, R.J. Schoelkopf, M.Mirrahimi, and M.H. Devoret. Confining the state of light to a quantum manifold by engineered two-photon loss. Science, 347(6224):853--857, February 2015. (main), (supplementary)
  31. E.T.Holland, B.Vlastakis, R.W.Heeres, M.J.Reagor, U.Vool, Z.Leghtas, L.Frunzio, G.Kirchmair, M.H.Devoret, M.Mirrahimi, and R.J.Schoelkopf. Single-Photon-Resolved Cross-Kerr Interaction for Autonomous Stabilization of Photon-Number States. Phys. Rev. Lett. 115, 180501. 2015.
    32. 2014
  32. L.Sun, A.Petrenko, Z.Leghtas, B.Vlastakis, G.Kirchmair, K.M. Sliwa, A.Narla, M.Hatridge, S.Shankar, J.Blumoff, L.Frunzio, M.Mirrahimi, M.H. Devoret, and R.J. Schoelkopf. Tracking photon jumps with repeated quantum non-demolition parity measurements. Nature, 511(7510):444--+, July 2014. (main)
  33. M.Mirrahimi, Z.Leghtas, V.V. Albert, S.Touzard, R.J. Schoelkopf, L.Jiang, and M.H. Devoret. Dynamically protected cat-qubits: a new paradigm for universal quantum computation. New Journal of Physics, 16:045014, April 2014. (main)
    34. 2013
  34. B.Vlastakis, G.Kirchmair, Z.Leghtas, S.E. Nigg, L.Frunzio, S.M. Girvin, M.Mirrahimi, M.H. Devoret, and R.J. Schoelkopf. Deterministically encoding quantum information using 100-photon schrodinger cat states. Science, 342(6158):607--610, November 2013. (main), (supplementary)
  35. S.Shankar, M.Hatridge, Z.Leghtas, K.M. Sliwa, A.Narla, U.Vool, S.M. Girvin, L.Frunzio, M.Mirrahimi, and M.H. Devoret. Autonomously stabilized entanglement between two superconducting quantum bits. Nature 504, December 2013. (main)
  36. R.Rey-de Castro, Z.Leghtas, and H.Rabitz. Manipulating quantum pathways on the fly. Physical Review Letters, 110(22):223601, May 2013. (main)
  37. Z.Leghtas, U.Vool, S.Shankar, M.Hatridge, S.M. Girvin, M.H. Devoret, and M.Mirrahimi. Stabilizing a bell state of two superconducting qubits by dissipation engineering. Physical Review A, 88(2):023849, August 2013. (main)
  38. Z.Leghtas, G.Kirchmair, B.Vlastakis, R.J. Schoelkopf, M.H. Devoret, and M.Mirrahimi. Hardware-efficient autonomous quantum memory protection. Physical Review Letters, 111(12):120501, September 2013. (main)
  39. Z.Leghtas, G.Kirchmair, B.Vlastakis, M.H. Devoret, R.J. Schoelkopf, and M.Mirrahimi. Deterministic protocol for mapping a qubit to coherent state superpositions in a cavity. Physical Review A, 87(4):042315, April 2013. (main)
  40. G.Kirchmair, B.Vlastakis, Z.Leghtas, S.E. Nigg, H.Paik, E.Ginossar, M.Mirrahimi, L.Frunzio, S.M. Girvin, and R.J. Schoelkopf. Observation of quantum state collapse and revival due to the single-photon kerr effect. Nature, 495(7440):205--209, March 2013. (main) (supplementary)
  41. K.Geerlings, Z.Leghtas, I.M. Pop, S.Shankar, L.Frunzio, R.J. Schoelkopf, M.Mirrahimi, and M.H. Devoret. Demonstrating a driven reset protocol for a superconducting qubit. Physical Review Letters, 110(12):120501, March 2013. (main)
    42. 2012
  42. O.M. Shir, J.Roslund, Z.Leghtas, and H.Rabitz. Quantum control experiments as a testbed for evolutionary multi-objective algorithms. Genetic Programming and Evolvable Machines, 13(4):445--491, December 2012. (main)
  43. A.Sarlette, Z.Leghtas, M.Brune, J.M. Raimond, and P.Rouchon. Stabilization of nonclassical states of one- and two-mode radiation fields by reservoir engineering. Physical Review A, 86(1):012114, July 2012. (main)
  44. Z.Leghtas, G.Turinici, H.Rabitz, and P.Rouchon. Hamiltonian identification through enhanced observability utilizing quantum control. Ieee Transactions On Automatic Control, 57(10):2679--2683, October 2012. (main)
    45. 2011
  45. Z.Leghtas, A.Sarlette, and P.Rouchon. Adiabatic passage and ensemble control of quantum systems. Journal of Physics B-atomic Molecular and Optical Physics, 44(15):154017, August 2011. (main)
  46. Z.Leghtas, M.Mirrahimi, and P.Rouchon. Back and forth nudging for quantum state estimation by continuous weak measurement. 2011 American Control Conference, 2011. (main)
  47. Z.Leghtas, M.Mirrahimi, and P.Rouchon. Parameter estimation of a 3-level quantum system with a single population measurement. Proceedings of the 48th Ieee Conference On Decision and Control, 2009. (main)