56 citations · 490 across the 33 of their papers we have counts for
33 papers
Noise tailoring for error mitigation and for diagnozing digital quantum computers
Thibault Scoquart, Hugo Perrin, Kyrylo Snizhko
Error mitigation (EM) methods are crucial for obtaining reliable results in the realm of noisy intermediate-scale quantum (NISQ) computers, where noise significantly impacts output…
Gradually opening Schrödinger's box reveals a cascade of sharp dynamical transitions
Barkay Guttel, Danielle Gov, Noam Netzer +9
Quantum mechanics predicts that unobserved systems may exist in a superposition of states, yet measurement produces definite outcomes, a tension at the heart of the quantum-to-clas…
On modeling quantum point contacts in quantum Hall systems
Prasoon Kumar, Kyrylo Snizhko
Quantum point contacts (QPC) are a key instrument in investigating the physics of edge excitations in the quantum Hall effect. However, at not-so-high bias voltage values, the pred…
General theory of slow non-Hermitian evolution
Parveen Kumar, Yuval Gefen, Kyrylo Snizhko
Non-Hermitian systems are widespread in both classical and quantum physics. The dynamics of such systems has recently become a focal point of research, showcasing surprising behavi…
Scaling tunnelling noise in the fractional quantum Hall effect tells about renormalization and breakdown of chiral Luttinger liquid
Noam Schiller, Tomer Alkalay, Changki Hong +4
The fractional quantum Hall (FQH) effect provides a paradigmatic example of a topological phase of matter. FQH edges are theoretically described via models belonging to the class o…
BACQ -- Application-oriented Benchmarks for Quantum Computing
Frédéric Barbaresco, Laurent Rioux, Christophe Labreuche +14
With the support of the national program on measurements, standards, and evaluation of quantum technologies MetriQs-France, a part of the French national quantum strategy, the BACQ…
Dilute measurement-induced cooling into many-body ground states
Josias Langbehn, Kyrylo Snizhko, Igor Gornyi +3
Cooling a quantum system to its ground state is important for the characterization of non-trivial interacting systems, and in the context of a variety of quantum information platfo…
Mitigating crosstalk errors by randomized compiling: Simulation of the BCS model on a superconducting quantum computer
Hugo Perrin, Thibault Scoquart, Alexander Shnirman +2
We develop and apply an extension of the randomized compiling (RC) protocol that includes a special treatment of neighboring qubits and dramatically reduces crosstalk effects cause…
Dissipative preparation and stabilization of many-body quantum states in a superconducting qutrit array
Yunzhao Wang, Kyrylo Snizhko, Alessandro Romito +2
We present and analyze a protocol for driven-dissipatively preparing and stabilizing a manifold of quantum manybody entangled states with symmetry-protected topological order. Spec…
Topological transitions of the generalized Pancharatnam-Berry phase
Manuel F. Ferrer-Garcia, Kyrylo Snizhko, Alessio D'Errico +3
Distinct from the dynamical phase, in a cyclic evolution, a system's state may acquire an additional component, a.k.a. geometric phase. The latter is a manifestation of a closed pa…
Extracting the scaling dimension of quantum Hall quasiparticles from current correlations
Noam Schiller, Yuval Oreg, Kyrylo Snizhko
Fractional quantum Hall quasiparticles are generally characterized by two quantum numbers: electric charge and scaling dimension . For the simplest states (such as the Laugh…
Near-unit efficiency of chiral state conversion via hybrid-Liouvillian dynamics
Parveen Kumar, Kyrylo Snizhko, Yuval Gefen
Following the evolution under a non-Hermitian Hamiltonian (nHH) involves significant probability loss. This makes various nHH effects impractical in the quantum realm. In contrast,…
Observing a Topological Transition in Weak-Measurement-Induced Geometric Phases
Yunzhao Wang, Kyrylo Snizhko, Alessandro Romito +2
Measurement plays a quintessential role in the control of quantum systems. Beyond initialization and readout which pertain to projective measurements, weak measurements in particul…
Optimized Steering: Quantum State Engineering and Exceptional Points
Parveen Kumar, Kyrylo Snizhko, Yuval Gefen +1
The state of a quantum system may be steered towards a predesignated target state, employing a sequence of weak measurements (where the detector's readouts are tra…
Comment on "How to observe and quantify quantum-discord states via correlations"
Parveen Kumar, Kyrylo Snizhko
The protocol proposed in the commented-upon article can certify zero discord; however, it fails to quantify non-zero discord for some states. Further, the protocol is less efficien…
Energy relaxation in edge modes in the quantum Hall effect
Amir Rosenblatt, Sofia Konyzheva, Fabien Lafont +6
Studies of energy flow in quantum systems complement the information provided by common conductance measurements. The quantum limit of heat flow in one dimensional (1D) ballistic m…
Weak-measurement-induced phases and dephasing: broken symmetry of the geometric phase
Kyrylo Snizhko, Nihal Rao, Parveen Kumar +1
Coherent steering of a quantum state, induced by a sequence of weak measurements, has become an active area of theoretical and experimental study. For a closed steered trajectory,…
Quantum Zeno effect with partial measurement and noisy dynamics
Parveen Kumar, Alessandro Romito, Kyrylo Snizhko
We study the Quantum Zeno Effect (QZE) induced by continuous partial measurement in the presence of short-correlated noise in the system Hamiltonian. We study the survival probabil…
Weak-measurement-induced asymmetric dephasing: manifestation of intrinsic measurement chirality
Kyrylo Snizhko, Parveen Kumar, Nihal Rao +1
Geometrical dephasing is distinct from dynamical dephasing in that it depends on the trajectory traversed, hence it reverses its sign upon flipping the direction in which the path…
Engineering two-qubit mixed states with weak measurements
Parveen Kumar, Kyrylo Snizhko, Yuval Gefen
It is known that protocols based on weak measurements can be used to steer quantum systems into pre-designated pure states. Here we show that weak-measurement-based steering protoc…
Quantum Zeno effect appears in stages
Kyrylo Snizhko, Parveen Kumar, Alessandro Romito
In the quantum Zeno effect, quantum measurements can block the coherent oscillation of a two level system by freezing its state to one of the measurement eigenstates. The effect is…
Topological transition in measurement-induced geometric phases
Valentin Gebhart, Kyrylo Snizhko, Thomas Wellens +3
The state of a quantum system, adiabatically driven in a cycle, may acquire a measurable phase depending only on the closed trajectory in parameter space. Such geometric phases are…
Non-Abelian Berry phase for open quantum systems: Topological protection vs geometric dephasing
Kyrylo Snizhko, Reinhold Egger, Yuval Gefen
We provide a detailed theoretical analysis of the adiabatic evolution of degenerate open quantum systems, where the dynamics is induced by time-dependent fluctuating loop paths in…
Non-Abelian Geometric Dephasing
Kyrylo Snizhko, Reinhold Egger, Yuval Gefen
We study the adiabatic dynamics of degenerate quantum states induced by loop paths in a control parameter space. The latter correspond to noisy trajectories if the system is weakly…