9 citations · 16 across the 8 of their papers we have counts for
9 papers · 1 filter
Beyond Unitary Quantum Simulation: Open-System Approaches to Quantum Chemistry toward Quantum Advantage
Michael Marthaler, Elias Zapusek, Florentin Reiter
Quantum simulation is widely regarded as one of the most promising routes to genuine quantum advantage, yet most existing approaches to quantum chemistry are formulated in terms of…
Quantum Fanout Gates in Constant Depth via Resonance Engineering
Johannes Alexander Jaeger, Elias Zapusek, Florentin Reiter
We present a novel implementation of an n-qubit fanout gate using resonance engineering. Our proposed mechanism uses Jaynes-Cummings interactions between multiple qubits and a comm…
Scaling Quantum Algorithms via Dissipation: Avoiding Barren Plateaus
Elias Zapusek, Ivan Rojkov, Florentin Reiter
Variational quantum algorithms (VQAs) have enabled a wide range of applications on near-term quantum devices. However, their scalability is fundamentally limited by barren plateaus…
Scalable dissipative quantum error correction for qubit codes
Ivan Rojkov, Elias Zapusek, Florentin Reiter
Dissipative quantum error correction (QEC) autonomously protects quantum information using engineered dissipation and offers a promising alternative to error correction via measure…
Variational quantum thermalizers based on weakly-symmetric nonunitary multi-qubit operations
Elias Zapusek, Kristina Kirova, Walter Hahn +2
We propose incorporating multi-qubit nonunitary operations in Variational Quantum Thermalizers (VQTs). VQTs are hybrid quantum-classical algorithms that generate the thermal (Gibbs…
Stabilization of cat-state manifolds using nonlinear reservoir engineering
Ivan Rojkov, Matteo Simoni, Elias Zapusek +2
We introduce a novel reservoir engineering approach for stabilizing multi-component Schrödinger's cat manifolds. The fundamental principle of the method lies in the destructive int…
Provable advantages of kernel-based quantum learners and quantum preprocessing based on Grover's algorithm
Till Muser, Elias Zapusek, Vasilis Belis +1
There is an ongoing effort to find quantum speedups for learning problems. Recently, [Y. Liu et al., Nat. Phys. , 1013--1017 (2021)] have proven an exponential speedup…
Experimental realization of nonunitary multi-qubit operations
Martin W. van Mourik, Elias Zapusek, Pavel Hrmo +5
We demonstrate a novel experimental toolset that enables irreversible multi-qubit operations on a quantum platform. To exemplify our approach, we realize two elementary nonunitary…
Nonunitary Gate Operations by Dissipation Engineering
E. Zapusek, A. Javadi, F. Reiter
Irreversible logic is at odds with unitary quantum evolution. Emulating such operations by classical measurements can result in disturbances and high resource demands. To overcome…