Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Measurement-induced entanglement and teleportation on a noisy quantum processor
Jesse C. Hoke, Matteo Ippoliti, D. Abanin +160 more·Mar 8, 2023
Measurement has a special role in quantum theory^ 1 : by collapsing the wavefunction, it can enable phenomena such as teleportation^ 2 and thereby alter the ‘arrow of time’ that constrains unitary evolution. When integrated in many-body dynamics, mea...
Design of an ultra-low mode volume piezo-optomechanical quantum transducer.
Piero Chiappina, J. Banker, S. Meesala +3 more·Mar 7, 2023
Coherent transduction of quantum states from the microwave to the optical domain can play a key role in quantum networking and distributed quantum computing. We present the design of a piezo-optomechanical device formed in a hybrid lithium niobate on...
Simplifying errors by symmetry and randomisation
James Mills, D. Sadhukhan, E. Kashefi·Mar 5, 2023
We present a set of methods to generate less complex error channels by quantum circuit parallelisation. The resulting errors are simplified as a consequence of their symmetrisation and randomisation. Initially, the case of a single error channel is a...
Variational Quantum Eigensolver for Classification in Credit Sales Risk
Joanna Wi'sniewska, Marek Sawerwain·Mar 5, 2023
The data classification task is broadly utilized in numerous fields of science and it may be realized by different known approaches (e.g. neural networks). However, in this work, quantum computations were harnessed to solve the problem. We take into ...
Pulse variational quantum eigensolver on cross-resonance-based hardware
D. Egger, Chiara Capecci, Bibek Pokharel +4 more·Mar 4, 2023
State-of-the-art noisy digital quantum computers can only execute short-depth quantum circuits. Variational algorithms are a promising route to unlock the potential of noisy quantum computers since the depth of the corresponding circuits can be kept ...
Quantum Steganography via Coherent and Fock State Encoding in an Optical Medium
Bruno Avritzer, T. Brun·Mar 4, 2023
Steganography is an alternative to cryptography, where information is protected by secrecy -- being disguised as innocent communication or noise -- rather than being scrambled. In this work we develop schemes for steganographic communication using Fo...
Good Gottesman-Kitaev-Preskill codes from the NTRU cryptosystem
J. Conrad, Jens Eisert, Jean-Pierre Seifert·Mar 4, 2023
We introduce a new class of random Gottesman-Kitaev-Preskill (GKP) codes derived from the cryptanalysis of the so-called NTRU cryptosystem. The derived codes are good in that they exhibit constant rate and average distance scaling Δ∝n with high proba...
Ab Initio Transcorrelated Method enabling accurate Quantum Chemistry on near-term Quantum Hardware
Werner Dobrautz, I. O. Sokolov, Ke Liao +4 more·Mar 3, 2023
Quantum computing is emerging as a new computational paradigm with the potential to transform several research fields, including quantum chemistry. However, current hardware limitations (including limited coherence times, gate infidelities, and limit...
Error mitigation in brainbox quantum autoencoders
Jos'ephine Pazem, M. Ansari·Mar 2, 2023
Quantum hardware faces noise challenges that disrupt multiqubit entangled states. Quantum autoencoder circuits with a single qubit bottleneck have demonstrated the capability to correct errors in noisy entangled states. By introducing slightly more c...
High-fidelity parametric beamsplitting with a parity-protected converter
Yao Lu, Aniket Maiti, John W. O. Garmon +6 more·Mar 2, 2023
Fast, high-fidelity operations between microwave resonators are an important tool for bosonic quantum computation and simulation with superconducting circuits. An attractive approach for implementing these operations is to couple these resonators via...
Achieving metrological limits using ancilla-free quantum error-correcting codes
Sisi Zhou, Argyris Giannisis Manes, Liang Jiang·Mar 2, 2023
Quantum error correction (QEC) is theoretically capable of achieving the ultimate estimation limits in noisy quantum metrology. However, existing quantum error-correcting codes designed for noisy quantum metrology generally exploit entanglement betwe...
Ising model formulation for highly accurate topological color codes decoding
Yugo Takada, Yusaku Takeuchi, K. Fujii·Mar 2, 2023
Quantum error correction is an essential ingredient for reliable quantum computation for theoretically provable quantum speedup. Topological color codes, one of the quantum error correction codes, have an advantage against the surface codes in that a...
Learning Correlated Noise in a 39-Qubit Quantum Processor
R. Harper, S. Flammia·Mar 1, 2023
Building error-corrected quantum computers relies crucially on measuring and modeling noise on candidate devices. In particular, optimal error correction requires knowing the noise that occurs in the device as it executes the circuits required for er...
Designing High-Fidelity Zeno Gates for Dissipative Cat Qubits
R. Gautier, M. Mirrahimi, A. Sarlette·Mar 1, 2023
Bosonic cat qubits stabilized with a driven two-photon dissipation are systems with exponentially biased noise, opening the door to low-overhead, fault-tolerant and universal quantum computing. However, current gate proposals for such qubits induce s...
Robustness of quantum algorithms against coherent control errors
J. Berberich, D. Fink, C. Holm·Mar 1, 2023
Coherent control errors, for which ideal Hamiltonians are perturbed by unknown multiplicative noise terms, are a major obstacle for reliable quantum computing. In this paper, we present a framework for analyzing the robustness of quantum algorithms a...
Impact of decoherence on the fidelity of quantum gates leaving the computational subspace
Tahereh Abad, Y. Schattner, A. F. Kockum +1 more·Feb 27, 2023
The fidelity of quantum operations is often limited by incoherent errors, which typically can be modeled by fundamental Markovian noise processes such as amplitude damping and dephasing. In Phys. Rev. Lett. 129, 150504 (2022), we presented an analyti...
Quantum metrology algorithms for dark matter searches with clocks
M. H. Zaheer, N. Matjelo, D. Hume +2 more·Feb 25, 2023
Quantum algorithms such as dynamical decoupling can be used to improve the sensitivity of a quantum sensor to a signal while suppressing sensitivity to noise. Atomic clocks are among the most sensitive quantum sensors, with recent improvements in clo...
Robust suppression of noise propagation in GKP error-correction
C. Siegele, P. Campagne-Ibarcq·Feb 23, 2023
Straightforward logical operations contrasting with complex state preparation are the hallmarks of the bosonic encoding proposed by Gottesman, Kitaev and Preskill (GKP). The recently reported generation and error-correction of GKP qubits in trapped i...
Quantum spherical codes
Shubham P. Jain, Joseph T. Iosue, A. Barg +1 more·Feb 22, 2023
As with classical computers, quantum computers require error-correction schemes to reliably perform useful large-scale calculations. The nature and frequency of errors depends on the quantum computing platform, and although there is a large literatur...
Signatures of non-Markovianity of a superconducting qubit
Bal'azs Gul'acsi, G. Burkard·Feb 17, 2023
We describe temporally correlated noise processes that influence the idle evolution of a superconducting transmon qubit. To model the composite qubit-environment system we use quantum circuit theory, and we show how a circuit Hamiltonian can be deriv...