180 citations · 958 across the 40 of their papers we have counts for
12 papers · 1 filter
Controlling the electron-phonon heat exchange in a metallic film by its position in a dielectric slab
D. V. Anghel, M. Dolineanu, J. Bergli +1
We theoretically study the heat flux between electrons and phonons in a thin metallic film embedded in a suspended dielectric slab (called a \textit{membrane}, in accordance with t…
Bloch-sphere approach to correlated noise in coupled qubits
Håkon Brox, Joakim Bergli, Yuri Galperin
By use of a generalized Bloch vector construction, we study the decoherence of a system composed of two interacting qubits in a general noisy environment. In particular, we investi…
Nonlinear high-frequency hopping conduction in two-dimensional arrays of Ge-in-Si quantum dots: Acoustic methods
I. L. Drichko, A. M. Diakonov, V. A. Malysh +6
Using acoustic methods we have measured nonlinear AC conductance in 2D arrays of Ge-in-Si quantum dots. The combination of experimental results and modeling of AC conductance of a…
Effects of external driving on the coherence time of a Josephson junction qubit in a bath of two level fluctuators
Håkon Brox, Joakim Bergli, Yuri M. Galperin
We study the effect of external driving on the two level systems (TLSs) assumed to be a major obstacle in increasing the coherence time of solid state Josephson-junction qubits. We…
Nonequilibrium electrons in tunnel structures under high-voltage injection
N. B. Kopnin, Y. M. Galperin, J. Bergli +1
We investigate electronic distributions in nonequilibrium tunnel junctions subject to a high voltage bias under competing electron-electron and electron-phonon relaxation proce…
Decoherence in qubits due to low-frequency noise
J Bergli, Y M Galperin, B L Altshuler
The efficiency of the future devices for quantum information processing is limited mostly by the finite decoherence rates of the qubits. Recently a substantial progress was achieve…
Exact solution for the dynamical decoupling of a qubit with telegraph noise
Joakim Bergli, Lara Faoro
We study the dissipative dynamics of a qubit that is afflicted by classical random telegraph noise and it is subject to dynamical decoupling. We derive exact formulas for the qubit…
Non-Gaussian low-frequency noise as a source of qubit decoherence
Y. M. Galperin, B. L. Altshuler, J. Bergli +1
We study decoherence in a qubit with the distance between the two levels affected by random flips of bistable fluctuators. For the case of a single fluctuator we evaluate explicitl…
Rabi oscillations of a qubit coupled to a two-level system
Y. M. Galperin, D. V. Shantsev, J. Bergli +1
The problem of Rabi oscillations in a qubit coupled to a fluctuator and in contact with a heath bath is considered. A scheme is developed for taking into account both phase and ene…
Models of environment and T_1 relaxation in Josephson Charge Qubits
Lara Faoro, Joakim Bergli, Boris L. Altshuler +1
A theoretical interpretation of the recent experiments of Astafiev et. al. on the T_1-relaxation rate in Josephson Charge Qubits is proposed. The experimentally observed reproducib…
Is weak temperature dependence of electron dephasing possible?
V. V. Afonin, J. Bergli, Y. M. Galperin +2
The first-principle theory of electron dephasing by disorder-induced two state fluctuators is developed. There exist two mechanisms of dephasing. First, dephasing occurs due to dir…
Acoustoelectric current for composite fermions
Joakim Bergli, Yuri Galperin
The acoustelectric current for composite fermions in a two-dimensional electron gas (2DEG) close to the half-filled Landau level is calculated in the random phase approximation. Th…