Papers
Live trends in quantum computing research, updated daily from arXiv.
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31,611
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15,684 papers in 12 months (-39% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Designing Calibration and Expressivity-Efficient Instruction Sets for Quantum Computing
Prakash Murali, L. Lao, M. Martonosi +1 more·Jun 1, 2021
Near-term quantum computing (QC) systems have limited qubit counts, high gate (instruction) error rates, and typically support a minimal instruction set having one type of two-qubit gate (2Q). To reduce program instruction counts and improve applicat...
Z3 gauge theory coupled to fermions and quantum computing
Ronak Desai, Yuan Feng, Mohammad Hassan +2 more·Jun 1, 2021
We study the Z3 gauge theory with fermions on the quantum computer using the Variational Quantum Eigensolver (VQE) algorithm with IBM QISKit software. Using up to 9 qubits we are able to obtain accurate results for the ground state energy. Introducin...
Quantum error correction and holographic information from bilocal holography
R. de Mello Koch, Eunice Gandote, N. H. Tahiridimbisoa +1 more·Jun 1, 2021
Bilocal holography is a constructive approach to the higher spin theory holographically dual to O(N ) vector models. In contrast to other approaches to bulk reconstruction, bilocal holography does not take input from the dual gravitational theory. Th...
State transfer with separable optical beams and variational quantum algorithms with classical light
Sooryansh Asthana, V. Ravishankar·Jun 1, 2021
Classical electromagnetic fields and quantum mechanics– both obey the principle of superposition alike. This opens up many avenues for simulation of a large variety of phenomena and algorithms, which have hitherto been considered quantum mechanical. ...
A comparison of various classical optimizers for a variational quantum linear solver
Aidan Pellow-Jarman, I. Sinayskiy, A. Pillay +1 more·Jun 1, 2021
Variational hybrid quantum classical algorithms are a class of quantum algorithms intended to run on noisy intermediate-scale quantum (NISQ) devices. These algorithms employ a parameterized quantum circuit (ansatz) and a quantum-classical feedback lo...
Towards Solving the Bcs Hamiltonian Gap in Near-Term Quantum Computers
Nahum S'a, I. S. Oliveira, I. Roditi·May 31, 2021
In this work, using a NISQ framework, we obtain the gap of a BCS Hamiltonian. This could lead to interesting implications for superconductivity research. For such task, we choose to use the Variational Quantum Deflation and analyze the hardware restr...
Rotational Coherence Times of Polar Molecules in Optical Tweezers.
Sean Burchesky, L. Anderegg, Yicheng Bao +5 more·May 31, 2021
Qubit coherence times are critical to the performance of any robust quantum computing platform. For quantum information processing using arrays of polar molecules, a key performance parameter is the molecular rotational coherence time. We report a 93...
Dynamics of superconducting qubit relaxation times
Malcolm Carroll, S. Rosenblatt, P. Jurcevic +2 more·May 31, 2021
Superconducting qubits are a leading candidate for quantum computing but display temporal fluctuations in their energy relaxation times T 1 . This introduces instabilities in multi-qubit device performance. Furthermore, autocorrelation in these time ...
Theory of quasi-exact fault-tolerant quantum computing and valence-bond-solid codes
Dongsheng Wang, Yunjiang Wang, Ningping Cao +2 more·May 31, 2021
In this work, we develop the theory of quasi-exact fault-tolerant quantum (QEQ) computation, which uses qubits encoded into quasi-exact quantum error-correction codes (‘quasi codes’). By definition, a quasi code is a parametric approximate code that ...
Entanglement Rate Optimization in Heterogeneous Quantum Communication Networks
Mahdi Chehimi, W. Saad·May 30, 2021
Quantum communication networks are emerging as a promising technology that could constitute a key building block in future communication networks in the 6G era and beyond. These networks have an inherent feature of parallelism that allows them to boo...
Circuit Design for k-Coloring Problem and Its Implementation in Any Dimensional Quantum System
A. Saha, Debasri Saha, Amlan Chakrabarti·May 29, 2021
With the evolution of quantum computing, researchers nowadays tend to incline to find solutions to NP-complete problems using quantum algorithms to gain asymptotic advantage. In this paper, we solve k-coloring problem (NP-complete problem) using Grov...
Quantum algorithm for the calculation of transition amplitudes in hybrid tensor networks
S. Kanno, Suguru Endo, Yasunari Suzuki +1 more·May 29, 2021
The hybrid tensor network approach allows us to perform calculations on systems larger than the scale of a quantum computer. However, when calculating transition amplitudes, there is a problem that the number of terms to be measured increases exponen...
Diagnosing Barren Plateaus with Tools from Quantum Optimal Control
Martín Larocca, Piotr Czarnik, Kunal Sharma +3 more·May 29, 2021
Variational Quantum Algorithms (VQAs) have received considerable attention due to their potential for achieving near-term quantum advantage. However, more work is needed to understand their scalability. One known scaling result for VQAs is barren pla...
Towards a NISQ Algorithm to Simulate Hermitian Matrix Exponentiation
Keren Li·May 28, 2021
A practical fault-tolerant quantum computer is worth looking forward to as it provides applications that outperform their known classical counterparts. However, millions of interacting qubits with stringent criteria are required, which is intractable...
Wave-Shape-Tolerant Photonic Quantum Gates.
Ihar Babushkin, A. Demircan, M. Kues +1 more·May 28, 2021
Photons, acting as "flying qubits" in propagation geometries such as waveguides, appear unavoidably in the form of wave packets (pulses). The actual shape of the photonic wave packet as well as possible temporal and spectral correlations between the ...
Linear regression by quantum amplitude estimation and its extension to convex optimization
K. Kaneko, Koichi Miyamoto, Naoyuki Takeda +1 more·May 28, 2021
Linear regression is a basic and widely-used methodology in data analysis. It is known that some quantum algorithms efficiently perform least squares linear regression of an exponentially large data set. However, if we obtain values of the regression...
An efficient hybrid hash based privacy amplification algorithm for quantum key distribution
Bingze Yan, Qiong Li, Haokun Mao +1 more·May 28, 2021
Privacy amplification (PA) is an essential part in a quantum key distribution (QKD) system, distilling a highly secure key from a partially secure string by public negotiation between two parties. The optimization objectives of privacy amplification ...
Contextuality degree of quadrics in multi-qubit symplectic polar spaces
Henri de Boutray, F. Holweck, Alain Giorgetti +2 more·May 28, 2021
Quantum contextuality takes an important place amongst the concepts of quantum computing that bring an advantage over its classical counterpart. For a large class of contextuality proofs, aka. observable-based proofs of the Kochen-Specker Theorem, we...
Environmental radiation impact on lifetimes and quasiparticle tunneling rates of fixed-frequency transmon qubits
R. Gordon, C. Murray, C. Kurter +12 more·May 28, 2021
Quantum computing relies on the operation of qubits in an environment as free of noise as possible. This work reports on measuring the impact of environmental radiation on lifetimes of fixed frequency transmon qubits with various capacitor pad geomet...
Engineering fast bias-preserving gates on stabilized cat qubits
Qiang-Da Xu, Joseph K. Iverson, F. Brandão +1 more·May 28, 2021
Stabilized cat codes can provide a biased noise channel with a set of bias-preserving (BP) gates, which can significantly reduce the resource overhead for fault-tolerant quantum computing. All existing schemes of BP gates, however, require adiabatic ...