407 citations · 1.5k across the 13 of their papers we have counts for
14 papers
Josephson Diode Effect in Andreev Molecules
J. -D. Pillet, S. Annabi, A. Peugeot +4
We propose a new platform for observing the Josephson diode effect: the Andreev molecule. This nonlocal electronic state is hosted in circuits made of two closely spaced Josephson…
Engineering a U(1) lattice gauge theory in classical electric circuits
Hannes Riechert, Jad C. Halimeh, Valentin Kasper +4
Lattice gauge theories are fundamental to such distinct fields as particle physics, condensed matter, and quantum information science. Their local symmetries enforce the charge con…
Weyl Josephson Circuits
Valla Fatemi, Anton R. Akhmerov, Landry Bretheau
We introduce Weyl Josephson circuits: small Josephson junction circuits that simulate Weyl band structures. We first formulate a general approach to design circuits that are analog…
Tunneling spectroscopy of graphene nanodevices coupled to large-gap superconductors
Joel I-Jan Wang, Landry Bretheau, Daniel Rodan-Legrain +4
We performed tunneling spectroscopy measurements of graphene coupled to niobium/niobium-nitride superconducting electrodes. Due to the proximity effect, the graphene density of sta…
Electrically Tunable Low Density Superconductivity in a Monolayer Topological Insulator
Valla Fatemi, Sanfeng Wu, Yuan Cao +6
The capability to switch electrically between superconducting and insulating states of matter represents a novel paradigm in the state-of-the-art engineering of correlated electron…
Quantum coherent control of a hybrid superconducting circuit made with graphene-based van der Waals heterostructures
Joel I-Jan Wang, Daniel Rodan-Legrain, Landry Bretheau +14
Quantum coherence and control is foundational to the science and engineering of quantum systems. In van der Waals (vdW) materials, the collective coherent behavior of carriers has…
Tunnelling Spectroscopy of Andreev States in Graphene
Landry Bretheau, Joel I-Jan Wang, Riccardo Pisoni +3
A normal conductor placed in good contact with a superconductor can inherit its remarkable electronic properties. This proximity effect microscopically originates from the formatio…
Observing a quantum Maxwell demon at work
N. Cottet, S. Jezouin, L. Bretheau +7
In apparent contradiction to the laws of thermodynamics, Maxwell's demon is able to cyclically extract work from a system in contact with a thermal bath exploiting the information…
Using Spontaneous Emission of a Qubit as a Resource for Feedback Control
P. Campagne-Ibarcq, S. Jezouin, N. Cottet +6
Persistent control of a transmon qubit is performed by a feedback protocol based on continuous heterodyne measurement of its fluorescence. By driving the qubit and cavity with micr…
Quantum dynamics of an electromagnetic mode that cannot contain N photons
Landry Bretheau, Philippe Campagne-Ibarcq, Emmanuel Flurin +2
Electromagnetic modes are instrumental in building quantum machines. In this experiment, we introduce a method to manipulate these modes by effectively controlling their phase spac…
Parameter estimation from measurements along quantum trajectories
Pierre Six, Philippe Campagne-Ibarcq, Landry Bretheau +2
The dynamics of many open quantum systems are described by stochastic master equations. In the discrete-time case, we recall the structure of the derived quantum filter governing t…
Observing interferences between past and future quantum states in resonance fluorescence
Philippe Campagne-Ibarcq, Landry Bretheau, Emmanuel Flurin +3
In quantum physics, measurement results are random but their statistics can be predicted assuming some knowledge about the system in the past. Additional knowledge from a future me…
Dynamics of quasiparticle trapping in Andreev levels
D. G. Olivares, L. Bretheau, Ç. Ö. Girit +3
We present a theory describing the trapping and untrapping of quasiparticles in the Andreev bound level of a single-channel weak link between two superconductors. We calculate the…
Evidence for long-lived quasiparticles trapped in superconducting point contacts
M. Zgirski, L. Bretheau, Q. Le Masne +3
We have observed that the supercurrent across phase-biased, highly transmitting atomic size contacts is strongly reduced within a broad phase interval around π. We attribute this e…