Papers
Live trends in quantum computing research, updated daily from arXiv.
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31,611
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15,683 papers in 12 months (-39% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Sequential Bayesian experiment design for adaptive Ramsey sequence measurements.
R. McMichael, S. Dushenko, S. Blakley·May 5, 2021
The Ramsey sequence is a canonical example of a quantum phase measurement for a spin qubit. In Ramsey measurements, the measurement efficiency can be optimized through careful selection of settings for the phase accumulation time setting, τ. This pap...
An Algorithmic Approach to Entanglement-Assisted Quantum Error-Correcting Codes from the Hermitian Curve
R. B. Christensen, C. Munuera, F. Pereira +1 more·May 5, 2021
<p style='text-indent:20px;'>We study entanglement-assisted quantum error-correcting codes (EAQECCs) arising from classical one-point algebraic geometry codes from the Hermitian curve with respect to the Hermitian inner product. Their only unknown pa...
Assessing the Nature of Chiral-Induced Spin Selectivity by Magnetic Resonance
A. Chiesa, M. Chizzini, E. Garlatti +8 more·May 5, 2021
Understanding chiral-induced spin selectivity (CISS), resulting from charge transport through helical systems, has recently inspired many experimental and theoretical efforts but is still the object of intense debate. In order to assess the nature of...
Clifford Circuit Optimization with Templates and Symbolic Pauli Gates
S. Bravyi, Ruslan Shaydulin, Shaohan Hu +1 more·May 5, 2021
The Clifford group is a finite subgroup of the unitary group generated by the Hadamard, the CNOT, and the Phase gates. This group plays a prominent role in quantum error correction, randomized benchmarking protocols, and the study of entanglement. He...
Parametrized Hamiltonian simulation using quantum optimal control
Paul Kairys, T. Humble·May 5, 2021
Analog quantum simulation offers a hardware-specific approach to studying quantum dynamics, but mapping a model Hamiltonian onto the available device parameters requires matching the hardware dynamics. We introduce a paradigm for quantum Hamiltonian ...
Essentiality of the Non-stoquastic Hamiltonians and Driver Graph Design in Quantum Optimization Annealing
V. Choi·May 5, 2021
One of the distinct features of quantum mechanics is that the probability amplitude can have both positive and negative signs, which has no classical counterpart as the classical probability must be positive. Consequently, one possible way to achieve...
Variational quantum eigensolver for dynamic correlation functions
Hongxiang Chen, Max Nusspickel, J. Tilly +1 more·May 4, 2021
Recent practical approaches for the use of current generation noisy quantum devices in the simulation of quantum many-body problems have been dominated by the use of a variational quantum eigensolver (VQE). These coupled quantum-classical algorithms ...
Error Mitigation in Quantum Computers through Instruction Scheduling
Kaitlin N. Smith, Gokul Subramanian Ravi, Prakash Murali +4 more·May 4, 2021
Quantum systems have potential to demonstrate significant computational advantage, but current quantum devices suffer from the rapid accumulation of error that prevents the storage of quantum information over extended periods. The unintentional coupl...
Towards security recommendations for public-key infrastructures for production environments in the post-quantum era
Sergey E. Yunakovsky, Maxim Kot, N. Pozhar +7 more·May 4, 2021
Quantum computing technologies pose a significant threat to the currently employed public-key cryptography protocols. In this paper, we discuss the impact of the quantum threat on public key infrastructures (PKIs), which are used as a part of securit...
Simultaneous Operations in a Two-Dimensional Array of Singlet-Triplet Qubits
F. Fedele, A. Chatterjee, S. Fallahi +3 more·May 4, 2021
In many physical approaches to quantum computation, error-correction schemes assume the ability to form two-dimensional qubit arrays with nearest-neighbor couplings and parallel operations at multiple qubit sites. While semiconductor spin qubits exhi...
Practical Verification of Quantum Properties in Quantum-Approximate-Optimization Runs
M. S. Alam, F. Wudarski, M. Reagor +7 more·May 4, 2021
In order to assess whether quantum resources can provide an advantage over classical computation, it is necessary to characterize and benchmark the non-classical properties of quantum algorithms in a practical manner. In this paper, we show that usin...
Dual-state purification for practical quantum error mitigation
M. Huo, Ying Li·May 4, 2021
Quantum error mitigation is essential for computing on the noisy quantum computer with a limited number of qubits. In this paper, we propose a practical protocol of error mitigation by virtually purifying the quantum state without qubit overhead or r...
Leveraging State Sparsity for More Efficient Quantum Simulations
Samuel Jaques, Thomas Häner·May 4, 2021
High-performance techniques to simulate quantum programs on classical hardware rely on exponentially large vectors to represent quantum states. When simulating quantum algorithms, the quantum states that occur are often sparse due to special structur...
A Backend-agnostic, Quantum-classical Framework for Simulations of Chemistry in C++
Daniel Claudino, A. McCaskey, Dmitry I. Lyakh·May 4, 2021
As quantum computing hardware systems continue to advance, the research and development of performant, scalable, and extensible software architectures, languages, models, and compilers is equally as important to bring this novel coprocessing capabili...
Universal Compiling and (No-)Free-Lunch Theorems for Continuous-Variable Quantum Learning
Tyler Volkoff, Zoe Holmes, A. Sornborger·May 3, 2021
Quantum compiling, where a parameterized quantum circuit is trained to learn a target unitary, is an important primitive for quantum computing that can be used as a subroutine to obtain optimal circuits or as a tomographic tool to study the dynamics ...
Design of an Integrated Bell-State Analyzer on a Thin-Film Lithium Niobate Platform
Uday Saha, E. Waks·May 3, 2021
Trapped ions are excellent candidates for quantum computing and quantum networks because of their long coherence times, ability to generate entangled photons as well as high fidelity single- and two-qubit gates. To scale up trapped ion quantum comput...
Switching between relaxation hotspots and coldspots in disordered spin qubits
A. Hosseinkhani, G. Burkard·May 3, 2021
We develop a valley-dependent envelope function theory that can describe the effects of arbitrary configurations of interface steps and miscuts on the qubit relaxation time. For a given interface roughness, we show how our theory can be used to find ...
Distributed Quantum Computing with QMPI
Thomas Häner, Damian S. Steiger, T. Hoefler +1 more·May 3, 2021
Practical applications of quantum computers require millions of physical qubits and it will be challenging for individual quantum processors to reach such qubit numbers. It is therefore timely to investigate the resource requirements of quantum algor...
Quantum Advantage with Shallow Circuits under Arbitrary Corruption
Atsuya Hasegawa, Franccois Le Gall·May 3, 2021
Recent works by Bravyi, Gosset and K\"onig (Science 2018), Bene Watts et al. (STOC 2019), Coudron, Stark and Vidick (QIP 2019) and Le Gall (CCC 2019) have shown unconditional separations between the computational powers of shallow (i.e., small-depth)...
Improved approximation algorithms for bounded-degree local Hamiltonians
Anurag Anshu, David Gosset, Karen J. Morenz Korol +1 more·May 3, 2021
The low-temperature properties of interacting quantum systems are believed to require exponential resources to compute in the general case. Quantifying the extent to which such properties can be approximated using efficient algorithms remains a signi...