Papers
Live trends in quantum computing research, updated daily from arXiv.
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On the exact quantum query complexity of $\text{MOD}_m^n$ and $\text{EXACT}_{k,l}^n$
Penghui Yao, Zekun Ye·Mar 20, 2023
The query model has generated considerable interest in both classical and quantum computing communities. Typically, quantum advantages are demonstrated by showcasing a quantum algorithm with a better query complexity compared to its classical counter...
Distributed exact quantum algorithms for Deutsch-Jozsa problem
Hao Li, Daowen Qiu, Leon Luo·Mar 19, 2023
Deutsch-Jozsa (DJ) problem is one of the most important problems demonstrating the power of quantum algorithm. DJ problem can be described as a Boolean function $f$: $\{0,1\}^n\rightarrow \{0,1\}$ with promising it is either constant or balanced, and...
Distributed exact quantum algorithms for Bernstein-Vazirani and search problems
Xu Zhou, Daowen Qiu, L. Lou·Mar 19, 2023
Distributed quantum computation has gained extensive attention since small-qubit quantum computers seem to be built more practically in the noisy intermediate-scale quantum (NISQ) era. In this paper, we give a distributed Bernstein-Vazirani algorithm...
Clifford-based Circuit Cutting for Quantum Simulation
Kaitlin N. Smith, M. Perlin, P. Gokhale +5 more·Mar 19, 2023
Quantum computing has potential to provide exponential speedups over classical computing for many important applications. However, today's quantum computers are in their early stages, and hardware quality issues hinder the scale of program execution....
Hybrid Error-Management Strategies in Quantum Repeater Networks
Poramet Pathumsoot, Theerapat Tansuwannont, Naphan Benchasattabuse +5 more·Mar 18, 2023
A quantum network is expected to enhance distributed quantum computing and quantum communication over a long distance while providing unconditional security. As quantum entanglement is essential for a quantum network, major issues from various types ...
Advantage of discrete variable representation in variational quantum eigensolvers for vibrational energy calculations
K. Asnaashari, D. Bondarenko, R. V. Krems·Mar 17, 2023
While quantum computing algorithms have been widely applied for electronic structure calculations, applications to molecular dynamics remain scarce. Complex and varied landscapes of molecular potential energy surfaces give rise to vibrational states ...
Estimating Coherent Contributions to the Error Profile Using Cycle Error Reconstruction
Arnaud Carignan-Dugas, S. Ranu, P. Dreher·Mar 17, 2023
Mitigation and calibration schemes are central to maximize the computational reach of today's Noisy Intermediate Scale Quantum (NISQ) hardware, but these schemes are often specialized to exclusively address either coherent or decoherent error sources...
Calculation of the energies of the multideterminant states of the nitrogen vacancy center in diamond with quantum Monte Carlo
K. Simula, I. Makkonen·Mar 17, 2023
Certain point defects in solids can efficiently be used as qubits for applications in quantum technology. They have spin states that are initializable, readable, robust, and can be manipulated optically. New theoretical methods are needed to find the...
Midcircuit Measurements on a Single-Species Neutral Alkali Atom Quantum Processor
T. M. Graham, L. Phuttitarn, R. Chinnarasu +7 more·Mar 17, 2023
We demonstrate mid-circuit measurements in a neutral atom array by shelving data qubits in protected hyperfine-Zeeman sub-states while non-destructively measuring an ancilla qubit. Measurement fidelity was enhanced using microwave repumping of the an...
Molecular electronic structure calculation via a quantum computer
H. Naeij, Erfan Mahmoudi, Hossein Davoodi Yeganeh +1 more·Mar 17, 2023
Quantum computers can be used to calculate the electronic structure and estimate the ground state energy of many-electron molecular systems. In the present study, we implement the Variational Quantum Eigensolver (VQE) algorithm, as a hybrid quantum-c...
Fano-qubits for quantum devices with enhanced isolation and bandwidth
Deepanshu Trivedi, L. Belostotski, A. Madanayake +1 more·Mar 17, 2023
Quantum devices often suffer from reflections and noise during readout, a problem traditionally addressed by magneto-optical isolators and circulators. However, these solutions are hindered by limited bandwidth, low tunability, high losses, and incom...
Quantum Monte Carlo simulations for financial risk analytics: scenario generation for equity, rate, and credit risk factors
T. Matsakos, Stuart A. Nield·Mar 16, 2023
Monte Carlo (MC) simulations are widely used in financial risk management, from estimating value-at-risk (VaR) to pricing over-the-counter derivatives. However, they come at a significant computational cost due to the number of scenarios required for...
Asymmetric Quantum Secure Multi-Party Computation With Weak Clients Against Dishonest Majority
Theodoros Kapourniotis, E. Kashefi, D. Leichtle +2 more·Mar 15, 2023
Secure multi-party computation (SMPC) protocols allow several parties that distrust each other to collectively compute a function on their inputs. In this paper, we introduce a protocol that lifts classical SMPC to quantum SMPC in a composably and st...
VENUS: A Geometrical Representation for Quantum State Visualization
Shaolun Ruan, Ribo Yuan, Yong Wang +6 more·Mar 15, 2023
Visualizations have played a crucial role in helping quantum computing users explore quantum states in various quantum computing applications. Among them, Bloch Sphere is the widely‐used visualization for showing quantum states, which leverages angle...
Constant Depth Code Deformations in the Parity Architecture
A. Messinger, M. Fellner, W. Lechner·Mar 15, 2023
We present a protocol to encode and decode arbitrary quantum states in the parity architecture with constant circuit depth using measurements, local nearest-neighbor and single-qubit operations only. While this procedure typically requires a quadrati...
Convergence and Quantum Advantage of Trotterized MERA for Strongly-Correlated Systems
Q. Miao, T. Barthel·Mar 15, 2023
Strongly-correlated quantum many-body systems are difficult to study and simulate classically. We recently proposed a variational quantum eigensolver (VQE) based on the multiscale entanglement renormalization ansatz (MERA) with tensors constrained to...
Quantum Circuit Simulation by SGEMM Emulation on Tensor Cores and Automatic Precision Selection
Hiryuki Ootomo, Hidetaka Manabe, K. Harada +1 more·Mar 15, 2023
Quantum circuit simulation provides the foundation for the development of quantum algorithms and the verification of quantum supremacy. Among the various methods for quantum circuit simulation, tensor network contraction has been increasing in popula...
Fermion-qudit quantum processors for simulating lattice gauge theories with matter
T. Zache, Daniel Gonz'alez-Cuadra, P. Zoller·Mar 15, 2023
Simulating the real-time dynamics of lattice gauge theories, underlying the Standard Model of particle physics, is a notoriously difficult problem where quantum simulators can provide a practical advantage over classical approaches. In this work, we ...
Scalable spin squeezing in a dipolar Rydberg atom array
G. Bornet, G. Emperauger, Cheng Chen +11 more·Mar 14, 2023
In the dipolar XY model, quench dynamics from a polarized initial state lead to spin squeezing that improves with increasing system size, and two refinements show further enhanced squeezing and extended lifetime of the squeezed state by freezing its ...
Leveraging hardware-control imperfections for error mitigation via generalized quantum subspace
Yasuhiro Ohkura, Suguru Endo, Takahiko Satoh +2 more·Mar 14, 2023
In the era of quantum computing without full fault-tolerance, it is essential to suppress noise effects via the quantum error mitigation techniques to enhance the computational power of the quantum devices. One of the most effective noise-agnostic er...