168 citations · 903 across the 33 of their papers we have counts for
34 papers
Optimal robust single-qubit gates in superconducting quantum processors
Tangyou Huang, Anuj Aggarwal, Jingjun Zhu +11
Fault-tolerant quantum computing requires high-fidelity quantum gates that are resilient to control errors and device imperfections. Here, we develop energy-optimal control pulses…
Numerical simulation methods for quantum sensing at parametric criticality
Kirill Petrovnin, Jiaming Wang, Gheorghe Sorin Paraoanu
Microwave photon detection is a key technology for low-temperature superconducting electronics and quantum information processing. A promising possibility is to use switching proce…
Neural-network-based design and implementation of fast and robust quantum gates
Marko Kuzmanović, Ilya Moskalenko, Yu-Han Chang +11
We present a continuous-time, neural-network-based approach to optimal control in quantum systems, with a focus on pulse engineering for quantum gates. Leveraging the framework of…
Quantum Process Tomography with Digital Twins of Error Matrices
Tangyou Huang, Akshay Gaikwad, Ilya Moskalenko +19
Accurate and robust quantum process tomography (QPT) is crucial for verifying quantum gates and diagnosing implementation faults in experiments aimed at building universal quantum…
Pareto-optimality of pulses for robust population transfer in a ladder-type qutrit
John J. McCord, Marko Kuzmanović, Gheorghe Sorin Paraoanu
Frequency-modulation schemes offer an alternative to standard Rabi pulses for realizing robust quantum operations. In this work, we investigate short-duration population transfer b…
Observation of the two-photon Landau-Zener-Stückelberg-Majorana effect
Isak Björkman, Marko Kuzmanović, Gheorghe Sorin Paraoanu
Second-order processes introduce nonlinearities in quantum dynamics, unlocking a totally unexpected area of control operations. Here we show that the well-known Landau-Zener-Stücke…
Quantum simulation of the pseudo-Hermitian Landau-Zener-Stückelberg-Majorana effect
Feliks Kivelä, Shruti Dogra, Gheorghe Sorin Paraoanu
While the Hamiltonians used in standard quantum mechanics are Hermitian, it is also possible to extend the theory to non-Hermitian Hamiltonians. Particularly interesting are non-He…
Coherent interaction-free detection of noise
John J. McCord, Shruti Dogra, Gheorghe Sorin Paraoanu
The measurement and characterization of noise is a flourishing area of research in mesoscopic physics. In this work, we propose interaction-free measurements as a noise-detection t…
High-fidelity robust qubit control by phase-modulated pulses
Marko Kuzmanović, Isak Björkman, John J. McCord +2
We present a set of robust and high-fidelity pulses that realize paradigmatic operations such as the transfer of the ground state population into the excited state and arbitrary $X…
Theory of coherent interaction-free detection of pulses
John J. McCord, Shruti Dogra, Gheorghe Sorin Paraoanu
Quantum physics allows an object to be detected even in the absence of photon absorption by the use of so-called interaction-free measurements. We provide a formulation of this pro…
Integrated conversion and photodetection of virtual photons in an ultrastrongly coupled superconducting quantum circuit
Luigi Giannelli, Giorgio Anfuso, Miroslav Grajcar +3
The ground-state of an artificial atom ultrastrongly coupled to quantized modes is entangled and contains an arbitrary number of virtual photons. The problem of their detection has…
Detecting virtual photons in ultrastrongly coupled superconducting quantum circuits
Luigi Giannelli, Elisabetta Paladino, Miroslav Grajcar +2
Light-matter interaction and understanding the fundamental physics behind is essential for emerging quantum technologies. Solid-state devices may explore new regimes where coupling…
Perfect stimulated Raman adiabatic passage with imperfect finite-time pulses
Shruti Dogra, Gheorghe Sorin Paraoanu
We present a well-tailored sequence of two Gaussian-pulsed drives that achieves perfect population transfer in STImulated Raman Adiabatic Passage (STIRAP). We give a theoretical an…
Coherent interaction-free detection of microwave pulses with a superconducting circuit
Shruti Dogra, John J. McCord, Gheorghe Sorin Paraoanu
The interaction-free measurement is a fundamental quantum effect whereby the presence of a photosensitive object is determined without irreversible photon absorption. Here we propo…
Experimental demonstration of robustness under scaling errors for superadiabatic population transfer in a superconducting circuit
Shruti Dogra, Antti Vepsäläinen, Gheorghe Sorin Paraoanu
We study experimentally and theoretically the transfer of population between the ground state and the second excited state in a transmon circuit by the use of superadiabatic stimul…
Generation and structuring of multipartite entanglement in Josephson parametric system
K. V. Petrovnin, M. R. Perelshtein, T. Korkalainen +4
Quantum correlations are a vital resource in advanced information processing based on quantum phenomena. Remarkably, the vacuum state of a quantum field may act as a key element fo…
A Tutorial on Optimal Control and Reinforcement Learning methods for Quantum Technologies
Luigi Giannelli, Sofia Sgroi, Jonathon Brown +4
Quantum Optimal Control is an established field of research which is necessary for the development of Quantum Technologies. In recent years, Machine Learning techniques have been p…
Quantum process tomography of adiabatic and superadiabatic stimulated Raman passage
Shruti Dogra, Gheorghe Sorin Paraoanu
Quantum control methods for three-level systems have become recently an important direction of research in quantum information science and technology. Here we present numerical sim…
Quantum simulation of parity-time symmetry breaking with a superconducting quantum processor
Shruti Dogra, Artem A. Melnikov, Gheorghe Sorin Paraoanu
The observation of genuine quantum effects in systems governed by non-Hermitian Hamiltonians has been an outstanding challenge in the field. Here we simulate the evolution under su…
Protocol for temperature sensing using a three-level transmon circuit
Aidar Sultanov, Marko Kuzmanović, Andrey V. Lebedev +1
We present a method for in situ temperature measurement of superconducting quantum circuits, by using the first three levels of a transmon device to which we apply a sequence of $π…
Reinforcement learning-enhanced protocols for coherent population-transfer in three-level quantum systems
Jonathon Brown, Sofia Sgroi, Luigi Giannelli +5
We deploy a combination of reinforcement learning-based approaches and more traditional optimization techniques to identify optimal protocols for population transfer in a multi-lev…
Benchmarking Machine Learning Algorithms for Adaptive Quantum Phase Estimation with Noisy Intermediate-Scale Quantum Sensors
Nelson Filipe Costa, Yasser Omar, Aidar Sultanov +1
Quantum phase estimation is a paradigmatic problem in quantum sensing andmetrology. Here we show that adaptive methods based on classical machinelearning algorithms can be used to…
Critical parametric quantum sensing
R. Di Candia, F. Minganti, K. V. Petrovnin +2
Critical quantum systems are a promising resource for quantum metrology applications, due to the diverging susceptibility developed in proximity of phase transitions. Here, we asse…
Engineering dissipation with resistive elements in circuit quantum electrodynamics
Marco Cattaneo, Gheorghe-Sorin Paraoanu
The importance of dissipation engineering ranges from universal quantum computation to non-equilibrium quantum thermodynamics. In recent years, more and more theoretical and experi…