221 citations · 977 across the 15 of their papers we have counts for
14 papers
Universal bound on microwave dissipation in superconducting circuits
Thibault Charpentier, Anton Khvalyuk, Lev Ioffe +3
Improving the coherence of superconducting qubits is essential for advancing quantum technologies. While superconductors are theoretically perfect conductors, they consistently exh…
First-order quantum breakdown of superconductivity in amorphous superconductors
Thibault Charpentier, David Perconte, Sébastien Léger +10
Continuous quantum phase transitions are widely assumed and frequently observed in various systems of quantum particles or spins. Their characteristic trait involves scaling laws g…
Anomalous Charge Noise in Superconducting Qubits
B. G. Christensen, C. D. Wilen, A. Opremcak +9
We have used Ramsey tomography to characterize charge noise in a weakly charge-sensitive superconducting qubit. We find a charge noise that scales with frequency as over 5…
Non-ergodic delocalized phase in Anderson model on Bethe lattice and regular graph
V. E. Kravtsov, B. L. Altshuler, L. B. Ioffe
We develop a novel analytical approach to the problem of single particle localization in infinite dimensional spaces such as Bethe lattice and random regular graphs. The key ingred…
Multifractal metal in a disordered Josephson Junction Array
M. Pino, V. E. Kravtsov, B. L. Altshuler +1
We report the results of the numerical study of the non-dissipative quantum Josephson junction chain with the focus on the statistics of many-body wave functions and local energy s…
Multifractal states in self-consistent theory of localization: analytical solution
B. L. Altshuler, L. B. Ioffe, V. E. Kravtsov
We consider disordered tight-binding models which Green's functions obey the self-consistent cavity equations . Based on these equations and the replica representation, we derive a…
Non-ergodic phases in strongly disordered random regular graphs
B. L. Altshuler, E. Cuevas, L. B. Ioffe +1
We combine numerical diagonalization with a semi-analytical calculations to prove the existence of the intermediate non-ergodic but delocalized phase in the Anderson model on disor…
Giant magnetoresistance in the variable range hopping regime
L. B. Ioffe, B. Z. Spivak
We predict the universal power law dependence of localization length on magnetic field in the strongly localized regime. This effect is due to the orbital quantum interference. Phy…
Quantum Superinductor with Tunable Non-Linearity
M. T. Bell, I. A. Sadovskyy, L. B. Ioffe +2
We report on the realization of a superinductor, a dissipationless element whose microwave impedance greatly exceeds the resistance quantum. The design of the superinductor, implem…
Fractal superconductivity near localization threshold
M. V. Feigel'man, L. B. Ioffe, V. E. Kravtsov +1
We develop a semi-quantitative theory of electron pairing and resulting superconductivity in bulk "poor conductors" in which Fermi energy is located in the region of localize…
Energy transport in strongly disordered superconductors and magnets
Lev Ioffe, Marc Mezard
We develop an analytical theory for quantum phase transitions driven by disorder in magnets and superconductors. We study these transitions with a cavity approximation which become…
Quantum Glass Transition in a Periodic Long-Range Josephson Array
D. M. Kagan, L. B. Ioffe, M. V. Feigel'man
We show that the ground state of the periodic long range Josephson array frustrated by magnetic field is a glass for a sufficiently large Josephson energies despite the absence of…
On the spin density wave transition in a two dimensional spin liquid
B. L. Altshuler, L. B. Ioffe, A. I. Larkin +1
Strongly correlated two dimensional electrons are believed to form a spin liquid in some regimes of density and temperature. As the density is varied, one expects a transition from…
Non local screening in a vortex line liquid
M. V. Feigelman, L. B. Ioffe
We show that the recent experiments \cite{safar} reporting the onset of the non-local conductivity in the vortex state of single crystals indicate the presence of a new li…