Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Streaming Quantum Gate Set Tomography Using the Extended Kalman Filter
J. P. Marceaux, Kevin C. Young·Jun 26, 2023
Closed-loop control algorithms for real-time calibration of quantum processors require efficient filters that can estimate physical error parameters based on streams of measured quantum circuit outcomes. Development of such filters is complicated by ...
On steering in the C*-algebraic framework
Michal Banacki·Jun 25, 2023
We discuss a scenario of bipartite steering with local subsystems of the parties modeled by certain operator algebras. In particular, we formalize the notion of quantum assemblages in a commuting observables paradigm and focus on equivalent descripti...
Generation of Non-Gaussian States in the Squeezed State Entanglement Scheme
E. N. Bashmakova, S. Korolev, T. Golubeva·Jun 25, 2023
The paper considers the possibility of generating different non-Gaussian states using the entangled state photon measurement scheme. In the paper, we have proposed a way to explicitly find the wave function and the Wigner function of the output state...
Noisy quantum trees: infinite protection without correction
S. A. Yadavalli, I. Marvian·Jun 25, 2023
We study quantum networks with tree structures, in which information propagates from a root to leaves. At each node in the network, the received qubit unitarily interacts with fresh ancilla qubits, after which each qubit is sent through a noisy chann...
Going beyond gadgets: the importance of scalability for analogue quantum simulators
Dylan Harley, Ishaun Datta, Frederik Ravn Klausen +4 more·Jun 23, 2023
Quantum hardware has the potential to efficiently solve computationally difficult problems in physics and chemistry to reap enormous practical rewards. Analogue quantum simulation accomplishes this by using the dynamics of a controlled many-body syst...
Three-Qubit Deutsch-Jozsa in Measurement-Based Quantum Computing
M. Schwetz, R. Noack·Jun 23, 2023
Measurement-based quantum computing (MBQC), an alternate paradigm for formulating quantum algorithms, can lead to potentially more flexible and efficient implementations as well as to theoretical insights on the role of entanglement in a quantum algo...
Quantum Deletion Codes Derived From Quantum Reed-Solomon Codes
M. Hagiwara·Jun 23, 2023
This manuscript presents a construction method for quantum codes capable of correcting multiple deletion errors. By introducing two new alogorithms, the alternating sandwich mapping and the block error locator, the proposed method reduces deletion er...
Semi-empirical Haken–Strobl model for molecular spin qubits
Katy Aruachan, Yamil J. Colón, D. Aravena +1 more·Jun 23, 2023
Understanding the physical processes that determine the relaxation T 1 and dephasing T 2 times of molecular spin qubits is critical for envisioned applications in quantum metrology and information processing. Recent spin-echo measurements of solid-st...
Randomized compiling in fault-tolerant quantum computation
Stefanie J. Beale, Joel J. Wallman·Jun 23, 2023
Studies of quantum error correction (QEC) typically focus on stochastic Pauli errors because the existence of a threshold error rate below which stochastic Pauli errors can be corrected implies that there exists a threshold below which generic errors...
Modelling non-Markovian noise in driven superconducting qubits
Abhishek Agarwal, Lachlan P. Lindoy, Deepesh Kumar Lall +2 more·Jun 22, 2023
Non-Markovian noise can be a significant source of errors in superconducting qubits. We develop gate sequences utilising mirrored pseudoidentities that allow us to characterise and model the effects of non-Markovian noise on both idle and driven qubi...
Stabilization of symmetry-protected long-range entanglement in stochastic quantum circuits
Iosifina Angelidi, M. Szyniszewski, A. Pal·Jun 22, 2023
Long-range entangled states are vital for quantum information processing and quantum metrology. Preparing such states by combining measurements with unitary gates opened new possibilities for efficient protocols with finite-depth quantum circuits. Th...
Practical limitations of quantum data propagation on noisy quantum processors
G. Saxena, A. Shalabi, T. Kyaw·Jun 22, 2023
The variational quantum imaginary time evolution algorithm is efficient in finding the ground state of a quantum Hamiltonian. This algorithm involves solving a system of linear equations in a classical computer and the solution is then used to propag...
Adversarial guesswork with quantum side information
Baasanchimed Avirmed, Kaito Niinomi, M. Dall’Arno·Jun 22, 2023
The guesswork of a classical-quantum channel quantifies the cost incurred in guessing the state transmitted by the channel when only one state can be queried at a time, maximized over any classical pre-processing and minimized over any quantum post-p...
Optimization Tools for Distance-Preserving Flag Fault-Tolerant Error Correction
Bálint Pató, Theerapat Tansuwannont, Shilin Huang +1 more·Jun 22, 2023
Lookup-table decoding is fast and distance preserving, making it attractive for near-term quantum computer architectures with small-distance quantum error-correcting codes. In this work, we develop several optimization tools that can potentially redu...
Efficient quantum image representation and compression circuit using zero-discarded state preparation approach
Md. Ershadul Haque, M. Paul, A. Ulhaq +1 more·Jun 22, 2023
Quantum image computing draws a lot of attention due to storing and processing image data faster than classical. With increasing the image size, the number of connections also increases, leading to the circuit complex. Therefore, efficient quantum im...
Topologically Ordered Steady States in Open Quantum Systems
Zijian Wang, Xu-Dong Dai, He-Ran Wang +1 more·Jun 21, 2023
The interplay between dissipation and correlation can lead to novel emergent phenomena in open systems. Here we investigate ``steady-state topological order'' defined by the robust topological degeneracy of steady states, which is a generalization of...
A Practical Overview of Quantum Computing: Is Exascale Possible?
J. Davenport, Jessica R. Jones, M. Thomason·Jun 21, 2023
Despite numerous advances in the field and a seemingly ever-increasing amount of investment, we are still some years away from seeing a production quantum computer in action. However, it is possible to make some educated guesses about the operational...
Single-Shot Decoding of Good Quantum LDPC Codes
Shouzhen Gu, Eugene Tang, Libor Caha +3 more·Jun 21, 2023
Quantum Tanner codes constitute a family of quantum low-density parity-check codes with good parameters, i.e., constant encoding rate and relative distance. In this article, we prove that quantum Tanner codes also facilitate single-shot quantum error...
Toward Chemical Accuracy with Shallow Quantum Circuits: A Clifford-Based Hamiltonian Engineering Approach.
Jiace Sun, Lixue Cheng, Weitang Li·Jun 21, 2023
Achieving chemical accuracy with shallow quantum circuits is a significant challenge in quantum computational chemistry, particularly for near-term quantum devices. In this work, we present a Clifford-based Hamiltonian engineering algorithm, namely C...
Hunting for Majoranas
A. Yazdani, F. von Oppen, B. Halperin +1 more·Jun 21, 2023
Over the past decade, there have been considerable efforts to observe non-abelian quasiparticles in novel quantum materials and devices. These efforts are motivated by the goals of demonstrating quantum statistics of quasiparticles beyond those of fe...