Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University of GothenburgSE951 papers
- Centre National de la Recherche ScientifiqueFR805 papers
- Leiden UniversityNL590 papers
- Max Planck Institute for Radio AstronomyDE405 papers
- European Southern ObservatoryCL356 papers
- Center for Astrophysics Harvard & SmithsonianUS313 papers
- Leiden Observatory304 papers
- California Institute of TechnologyUS296 papers
- National Astronomical Observatory of JapanJP280 papers
- Observatoire de ParisFR268 papers
- Stockholm UniversitySE262 papers
- Centro de AstrobiologíaES252 papers
27 papers · 2 filters
Experimental realization of deterministic and selective photon addition in a bosonic mode assisted by an ancillary qubit
Marina Kudra, Martin Jirlow, Mikael Kervinen +5
Bosonic quantum error correcting codes are primarily designed to protect against single-photon loss. To correct for this type of error, one can encode the logical qubit in code spa…
High-Q magnetic levitation and control of superconducting microspheres at millikelvin temperatures
Joachim Hofer, Rudolf Gross, Gerard Higgins +11
We report the levitation of a superconducting lead-tin sphere with 100 micrometer diameter (corresponding to a mass of 5.6 micrograms) in a static magnetic trap formed by two coils…
Quantum Depth in the Random Oracle Model
Atul Singh Arora, Andrea Coladangelo, Matthew Coudron +3
We give a comprehensive characterization of the computational power of shallow quantum circuits combined with classical computation. Specifically, for classes of search problems, w…
Quantum bath suppression in a superconducting circuit by immersion cooling
M. Lucas, A. V. Danilov, L. V. Levitin +7
Quantum circuits interact with the environment via several temperature-dependent degrees of freedom. Yet, multiple experiments to-date have shown that most properties of supercondu…
Study of noise in virtual distillation circuits for quantum error mitigation
Pontus Vikstål, Giulia Ferrini, Shruti Puri
Virtual distillation has been proposed as an error mitigation protocol for estimating the expectation values of observables in quantum algorithms. It proceeds by creating a cyclic…
Superconducting microsphere magnetically levitated in an anharmonic potential with integrated magnetic readout
Martí Gutierrez Latorre, Gerard Higgins, Achintya Paradkar +2
Magnetically levitated superconducting microparticles offer a promising path to quantum experiments with picogram to microgram objects. In this work, we levitate a 700ng $\sim 10^{…
Quantum error correction with dissipatively stabilized squeezed cat qubits
Timo Hillmann, Fernando Quijandría
Noise-biased qubits are a promising route toward significantly reducing the hardware overhead associated with quantum error correction. The squeezed cat code, a non-local encoding…
Three-wave mixing traveling-wave parametric amplifier with periodic variation of the circuit parameters
Anita Fadavi Roudsari, Daryoush Shiri, Hampus Renberg Nilsson +8
We report the implementation of a near-quantum-limited, traveling-wave parametric amplifier that uses three-wave mixing (3WM). To favor amplification by 3WM, we use the superconduc…
Chiral Polaritonics: Analytic Solutions, Intuition and its Use
Christian Schäfer, Denis G. Baranov
Preferential selection of a given enantiomer over its chiral counterpart becomes increasingly relevant in the advent of the next era of medical drug design. In parallel, cavity qua…
Transmon qubit readout fidelity at the threshold for quantum error correction without a quantum-limited amplifier
Liangyu Chen, Hang-Xi Li, Yong Lu +17
High-fidelity and rapid readout of a qubit state is key to quantum computing and communication, and it is a prerequisite for quantum error correction. We present a readout scheme f…
Interaction between giant atoms in a one-dimensional structured environment
Ariadna Soro, Carlos Sánchez Muñoz, Anton Frisk Kockum
Giant atoms -- quantum emitters that couple to light at multiple discrete points -- are emerging as a new paradigm in quantum optics thanks to their many promising properties, such…
Correlated frequency noise in a multimode acoustic resonator
Nuttamas Tubsrinuan, Jared H. Cole, Per Delsing +1
Frequency instabilities are a major source of errors in quantum devices. This study investigates frequency fluctuations in a surface acoustic wave (SAW) resonator, where reflection…
Gradient-descent quantum process tomography by learning Kraus operators
Shahnawaz Ahmed, Fernando Quijandría, Anton Frisk Kockum
We perform quantum process tomography (QPT) for both discrete- and continuous-variable quantum systems by learning a process representation using Kraus operators. The Kraus form en…
Extensive characterization of a family of efficient three-qubit gates at the coherence limit
Christopher W. Warren, Jorge Fernández-Pendás, Shahnawaz Ahmed +13
While all quantum algorithms can be expressed in terms of single-qubit and two-qubit gates, more expressive gate sets can help reduce the algorithmic depth. This is important in th…
Qubit readout and quantum sensing with pulses of quantum radiation
Maryam Khanahmadi, Klaus Mølmer
Different hypotheses about a quantum system such as the logical state of a qubit or the value of physical interaction parameters can be investigated by the interaction with a probe…
A high gain travelling-wave parametric amplifier based on three-wave mixing
Hampus Renberg Nilsson, Anita Fadavi Roudsari, Daryoush Shiri +2
We extend the theory for a Josephson junction travelling wave parametric amplifier (TWPA) operating in the three-wave mixing regime and we propose a scheme for achieving high gain.…
Dynamic of Single Molecules in Collective Light-Matter States from First Principles
Christian Schäfer
The coherent interaction of a large collection of molecules with a common photonic mode results in strong light-matter coupling, a feature that proved highly beneficial for chemist…
Low-pass filter with ultra-wide stopband for quantum computing applications
Robert Rehammar, Simone Gasparinetti
A new type of low-pass filter based on a leaky coaxial waveguide is presented. The filter has minimal insertion loss in the pass band, while at the same time high attenuation in th…
Measurement and control of a superconducting quantum processor with a fully-integrated radio-frequency system on a chip
Mats O. Tholén, Riccardo Borgani, Giuseppe Ruggero Di Carlo +8
We describe a digital microwave platform called Presto, designed for measurement and control of multiple quantum bits (qubits) and based on the third-generation radio-frequency sys…
The vacuum provides quantum advantage to otherwise simulatable architectures
Cameron Calcluth, Alessandro Ferraro, Giulia Ferrini
We consider a computational model composed of ideal Gottesman-Kitaev-Preskill stabilizer states, Gaussian operations - including all rational symplectic operations and all real dis…
Deterministic Gaussian conversion protocols for non-Gaussian single-mode resources
Oliver Hahn, Patric Holmvall, Pascal Stadler +2
In the context of quantum technologies over continuous variables, Gaussian states and operations are typically regarded as freely available, as they are relatively easily accessibl…
Quantum-enhanced Doppler lidar
Maximilian Reichert, Roberto Di Candia, Moe Z. Win +1
We propose a quantum-enhanced lidar system to estimate a target's radial velocity which employs squeezed and frequency entangled signal and idler beams. We compare its performance…
Efficient simulation of Gottesman-Kitaev-Preskill states with Gaussian circuits
Cameron Calcluth, Alessandro Ferraro, Giulia Ferrini
We study the classical simulatability of Gottesman-Kitaev-Preskill (GKP) states in combination with arbitrary displacements, a large set of symplectic operations and homodyne measu…
Gaussian quantum estimation of the lossy parameter in a thermal environment
Robert Jonsson, Roberto Di Candia
Lossy bosonic channels play an important role in a number of quantum information tasks, since they well approximate thermal dissipation in an experiment. Here, we characterize thei…