Publications (8)
Pfaffian formula for fermion parity fluctuations in a superconductor and application to Majorana fusion detection
A. Grabsch, Y. Cheipesh, C. W. J. Beenakker
Kitaev's Pfaffian formula equates the ground-state fermion parity of a closed system to the sign of the Pfaffian of the Hamiltonian in the Majorana basis. Using Klich's theory of f…
Voltage staircase in a current-biased quantum-dot Josephson junction
D. O. Oriekhov, Y. Cheipesh, C. W. J. Beenakker
We calculate the current-voltage (I-V) characteristic of a Josephson junction containing a resonant level in the weakly coupled regime (resonance width small compared to the superc…
Dynamical signatures of ground-state degeneracy to discriminate against Andreev levels in a Majorana fusion experiment
A. Grabsch, Y. Cheipesh, C. W. J. Beenakker
Detection of the fusion rule of Majorana zero-modes is a near-term milestone on the road to topological quantum computation. An obstacle is that the non-deterministic fusion outcom…
Heisenberg's uncertainty principle in the PTOLEMY project: a theory update
PTOLEMY Collaboration, A. Apponi, M. G. Betti +58
We discuss the consequences of the quantum uncertainty on the spectrum of the electron emitted by the -processes of a tritium atom bound to a graphene sheet. We analyze quantit…
Ultrafast dynamics of cold Fermi gas after a local quench
N. V. Gnezdilov, A. I. Pavlov, V. Ohanesjan +2
We consider non-equilibrium dynamics of two initially independent reservoirs and filled with a cold Fermi gas coupled and decoupled by two quantum quenches following one an…
Planckian superconductor
Y. Cheipesh, A. I. Pavlov, V. Scopelliti +2
The Planckian relaxation rate sets a characteristic time scale for both equilibration of quantum critical systems and maximal quantum chaos…
Energy dynamics, information and heat flow in quenched cooling and the crossover from quantum to classical thermodynamics
V. Ohanesjan, Y. Cheipesh, N. V. Gnezdilov +2
The dynamics when a hot many-body quantum system is brought into instantaneous contact with a cold many-body quantum system can be understood as a combination of early time quantum…
Quantum tunneling dynamics in a complex-valued Sachdev-Ye-Kitaev model quench-coupled to a cool bath
Y. Cheipesh, A. I. Pavlov, V. Ohanesjan +2
The Sachdev-Ye-Kitaev (SYK) model describes interacting fermionic zero modes in zero spatial dimensions, e.g. quantum dot, with interactions strong enough to completely washout qua…