Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Controlling frequency-domain Hong-Ou-Mandel interference via electromagnetically induced transparency
Zi-Yu Liu, Jiun-Shiuan Shiu, Chin-Yao Cheng +1 more·Feb 14, 2023
Hong-Ou-Mandel (HOM) interference is a compelling quantum phenomenon that demonstrates the nonclassical nature of single photons. In this study, we investigate an electromagnetically induced transparency-based double-$\Lambda$ four-wave mixing system...
Hierarchies among genuine multipartite entangling capabilities of quantum gates
Mrinmoy Samanta, Sudipta Mondal, Samir Kumar Hazra +1 more·Feb 13, 2023
We classify quantum gates according to their capability to generate genuine multipartite entanglement (GME), using a hierarchy based on multipartite separable states. In particular, when a fixed unitary operator acts on the set of k-separable states,...
Decomposition of Multi-controlled Special Unitary Single-Qubit Gates
Rafaella Vale, Thiago Melo D. Azevedo, Ismael C. S. Ara'ujo +2 more·Feb 13, 2023
Multi-controlled unitary gates have been a subject of interest in quantum computing since its inception, and are widely used in quantum algorithms. The current state-of-the-art approach to implementing n-qubit multi-controlled gates involves the use ...
Performance Analysis of a Repetition Cat Code Architecture: Computing 256-bit Elliptic Curve Logarithm in 9 Hours with 126 133 Cat Qubits.
É. Gouzien, Diego Ruiz, François-Marie Le Régent +2 more·Feb 13, 2023
Cat qubits provide appealing building blocks for quantum computing. They exhibit a tunable noise bias yielding an exponential suppression of bit flips with the average photon number and a protection against the remaining phase errors can be ensured b...
Asymptotically optimal synthesis of reversible circuits
Lvzhou Li, X. Wu·Feb 13, 2023
Reversible circuits have been studied extensively and intensively, and have plenty of applications in various areas, such as digital signal processing, cryptography, and especially quantum computing. In 2003, the lower bound $\Omega(2^n n/\log n)$ fo...
Novel Design of Quantum Circuits for Representation of Grayscale Images
Mayukh Sarkar·Feb 9, 2023
The advent of Quantum Computing has influenced researchers around the world to solve multitudes of computational problems with the promising technology. Feasibility of solutions for computational problems, and representation of various information, m...
Quantum computation of frequency-domain molecular response properties using a three-qubit iToffoli gate
Shiya Sun, Brett Marinelli, Jin Ming Koh +7 more·Feb 8, 2023
The quantum computation of molecular response properties on near-term quantum hardware is a topic of substantial interest. Computing these properties directly in the frequency domain is desirable, but the circuits require large depth if the typical h...
Qualitative quantum simulation of resonant tunneling and localization with the shallow quantum circuits
P. Wang·Feb 7, 2023
In a circuit-based quantum computer, the computing is performed via the discrete-time evolution driven by quantum gates. Accurate simulation of continuoustime evolution requires a large number of quantum gates and therefore suffers from more noise. I...
High-Threshold Codes for Neutral-Atom Qubits with Biased Erasure Errors
K. Sahay, J. Jin, J. Claes +2 more·Feb 6, 2023
The requirements for fault-tolerant quantum error correction can be simplified by leveraging structure in the noise of the underlying hardware. In this work, we identify a new type of structured noise motivated by neutral atom qubits, biased erasure ...
Quantum Circuit Components for Cognitive Decision-Making
D. Widdows, J. Rani, E. Pothos·Feb 6, 2023
This paper demonstrates that some non-classical models of human decision-making can be run successfully as circuits on quantum computers. Since the 1960s, many observed cognitive behaviors have been shown to violate rules based on classical probabili...
Universal quantum computing with qubits embedded in trapped-ion qudits
Anastasiia S. Nikolaeva, E. Kiktenko, A. Fedorov·Feb 6, 2023
Recent developments in qudit-based quantum computing, in particular with trapped ions, open interesting possibilities for scaling quantum processors without increasing the number of physical information carriers. In this work, we propose a method for...
A High Performance Compiler for Very Large Scale Surface Code Computations
George Watkins, Minh Hoang Nguyen, Keelan Watkins +3 more·Feb 5, 2023
We present the first high performance compiler for very large scale quantum error correction: it translates an arbitrary quantum circuit to surface code operations based on lattice surgery. Our compiler offers an end to end error correction workflow ...
Relaxing Hardware Requirements for Surface Code Circuits using Time-dynamics
Matthew J. McEwen, D. Bacon, C. Gidney·Feb 4, 2023
The typical time-independent view of quantum error correction (QEC) codes hides significant freedom in the decomposition into circuits that are executable on hardware. Using the concept of detecting regions, we design time-dynamic QEC circuits direct...
Low-depth simulations of fermionic systems on square-grid quantum hardware
Manuel G. Algaba, P. V. Sriluckshmy, M. Leib +1 more·Feb 3, 2023
We present a general strategy for mapping fermionic systems to quantum hardware with square qubit connectivity which yields low-depth quantum circuits, counted in the number of native two-qubit fSIM gates. We achieve this by leveraging novel operator...
Investigating the effect of circuit cutting in QAOA for the MaxCut problem on NISQ devices
Marvin Bechtold, Johanna Barzen, F. Leymann +4 more·Feb 3, 2023
Noisy intermediate-scale quantum (NISQ) devices are restricted by their limited number of qubits and their short decoherence times. An approach addressing these problems is quantum circuit cutting. It decomposes the execution of a large quantum circu...
Parallel Driving for Fast Quantum Computing Under Speed Limits
Evan McKinney, Chao Zhou, M. Xia +2 more·Feb 2, 2023
Increasing quantum circuit fidelity requires an efficient instruction set to minimize errors from decoherence. The choice of a two-qubit (2Q) hardware basis gate depends on a quantum modulator's native Hamiltonian interactions and applied control dri...
Dynamical Quantum Phase Transitions of the Schwinger Model: Real-Time Dynamics on IBM Quantum
Domenico Pomarico, L. Cosmai, P. Facchi +3 more·Feb 2, 2023
Simulating the real-time dynamics of gauge theories represents a paradigmatic use case to test the hardware capabilities of a quantum computer, since it can involve non-trivial input states’ preparation, discretized time evolution, long-distance enta...
Generalized Uncertainty Principles for Quantum Cryptography
Randy Kuang·Feb 2, 2023
We know the classical public cryptographic algorithms are based on certain NP-hard problems such as the integer factoring in RSA and the discrete logarithm in Diffie-Hellman. They are going to be vulnerable with fault-tolerant quantum computers. We a...
Scheme for parity-controlled multi-qubit gates with superconducting qubits
K. S. Christensen, N. Zinner, M. Kjaergaard·Feb 1, 2023
Multi-qubit parity measurements are at the core of many quantum error correction schemes. Extracting multi-qubit parity information typically involves using a sequence of multiple two-qubit gates. In this paper, we propose a superconducting circuit d...
Hardness of Braided Quantum Circuit Optimization in the Surface Code
Kunihiro Wasa, S. Nishio, K. Suetsugu +4 more·Feb 1, 2023
Large-scale quantum information processing requires the use of quantum error-correcting codes to mitigate the effects of noise in quantum devices. Topological error-correcting codes, such as surface codes, are promising candidates, as they can be imp...