5 citations · 7 across the 7 of their papers we have counts for
10 papers
Chaos, Fractals, and Ergodicity in Nonlinear Quantum Protocols
Attila Portik, Orsolya Kálmán, Tamás Kiss
Iterated nonlinear quantum protocols provide a straightforward way of realizing nonlinear dynamics in quantum systems through measurement and postselection. We investigate a family…
Persistence of Fractal Structures in Iterated Quantum Protocols: Robustness to Preparation and Gate Errors
Attila Portik, Orsolya Kálmán, Tamás Kiss
Repeatedly combining entangling gates on an ensemble of qubits with measurement and postselection on a part of them induces a nonlinear evolution of the unmeasured qubits' state, w…
Beyond Gaussian Entanglement: Practical Criteria for Polynomially Excited Quantum States
Gábor Homa, Richárd Balka, Nikolett Német +3
Polynomial excitations consisting of creation and annihilation operators are studied. Subsystem entanglement is proven produced and preserved by such manipulations. NPT entanglemen…
Intermodal entanglement in a quantum optical model of HHG due to the back-action on the driving field
Ákos Gombkötő, Péter Ádám, David Theidel +1
Preparation of nonclassical light with special quantum properties is essential for quantum technologies. High-harmonic generation (HHG) is a process which not only enables the crea…
Ergodic dynamics in iterated quantum protocols
Attila Portik, Orsolya Kálmán, Tamás Kiss
We study measurement-induced nonlinear dynamics generated by an iterated quantum protocol combining an entangling gate, a single-qubit rotation, and post-selection. For pure single…
Practical scheme for efficient distillation of GHZ states
Áron Rozgonyi, Gábor Széchenyi, Orsolya Kálmán +1
We develop an efficient local operation and classical communication (LOCC) scheme for the distillation of Greenberger-Horne-Zeilinger (GHZ) states from tripartite systems subjected…
Towards a benchmark for quantum computers based on an iterated post-selective protocol
Adrian Ortega, Orsolya Kálmán, Tamás Kiss
Applying post selection in each step of an iterated protocol leads to sensitive quantum dynamics that may be utilized to test and benchmark current quantum computers. An example of…
Universal, unambiguous concentration and distillation of Bell pairs
Orsolya Kálmán, Aurél Gábris, Igor Jex +1
The ability of preparing perfect Bell pairs with a practical scheme is of great relevance for quantum communication as well as distributed quantum computing. We propose a scheme wh…
Robustness of chaotic behavior in iterated quantum protocols
Attila Portik, Orosolya Kálmán, Igor Jex +1
One of the simplest possible quantum circuits, consisting of a CNOT gate, a Hadamard gate and a measurement on one of the outputs is known to lead to chaotic dynamics when applied…
Training iterated protocols for distillation of GHZ states with variational quantum algorithms
Áron Rozgonyi, Gábor Széchenyi, Orsolya Kálmán +1
We present optimized distillation schemes for preparing Greenberger-Horne-Zeilinger (GHZ) states. Our approach relies on training variational quantum circuits with white noise affe…