Papers
Live trends in quantum computing research, updated daily from arXiv.
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13,405 papers in 12 months (-22% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
A cost-efficient quantum access network with qubit-based synchronization
C. Huang, Yen-Jie chen, T. Luo +4 more·Aug 28, 2023
Quantum key distribution (QKD) is a physical layer encryption technique that enables two distant parties to exchange secure keys with information-theoretic security. In the last two decades, QKD has transitioned from laboratory research to real-world...
Quantum-Informed Recursive Optimization Algorithms
Jernej Rudi Finžgar, Aron Kerschbaumer, M. Schuetz +2 more·Aug 25, 2023
We propose and implement a family of quantum-informed recursive optimization (QIRO) algorithms for combinatorial optimization problems. Our approach leverages quantum resources to obtain information that is used in problem-specific classical reductio...
On the Study of Partial Qubit Hamiltonian for Efficient Molecular Simulation Using Variational Quantum Eigensolvers
Harshdeep Singh, Sabyashachi Mishra, S. Majumder·Aug 24, 2023
Quantum computing is being extensively used in quantum chemistry, especially in simulating simple molecules and evaluating properties like the ground state energy, dipole moment, etc. The transformation of a molecular Hamiltonian from the fermionic s...
Parallel-in-time quantum simulation via Page and Wootters quantum time
N. Diaz, Paolo Braccia, Martín Larocca +3 more·Aug 24, 2023
In the past few decades, researchers have created a veritable zoo of quantum algorithms by drawing inspiration from classical computing, information theory, and even from physical phenomena. Here, we present quantum algorithms for parallel-in-time si...
Practical limitations on robustness and scalability of quantum Internet
A. Sadhu, Meghana Ayyala Somayajula, K. Horodecki +1 more·Aug 24, 2023
As quantum theory allows for information processing and computing tasks that otherwise are not possible with classical systems, there is a need and use of quantum Internet beyond existing network systems. At the same time, the realization of a desira...
Quantum state tomography of photon's polarization and path degrees of freedom
J. L. Ferreira, B. L. Bernardo·Aug 24, 2023
Quantum state tomography (QST), the process through which the density matrix of a quantum system is characterized from measurements of specific observables, is a fundamental pillar in the fields of quantum information and computation. In this work, w...
Cryogenic microwave link for quantum local area networks
M. Renger, S. Gandorfer, W. Yam +16 more·Aug 23, 2023
Scalable quantum information processing with superconducting circuits is expected to advance from individual processors located in single dilution refrigerators to more powerful distributed quantum computing systems. The realization of hardware platf...
Exploration of superconducting multi-mode cavity architectures for quantum computing
A. Reineri, S. Zorzetti, Tanay Roy +1 more·Aug 22, 2023
Superconducting radio-frequency (SRF) cavities coupled to transmon circuits have proven to be a promising platform for building high-coherence quantum information processors. An essential aspect of this realization involves designing high quality fac...
Zero and Finite Temperature Quantum Simulations Powered by Quantum Magic
A. Gu, Hong-ye Hu, Di Luo +3 more·Aug 22, 2023
We introduce a quantum information theory-inspired method to improve the characterization of many-body Hamiltonians on near-term quantum devices. We design a new class of similarity transformations that, when applied as a preprocessing step, can subs...
Phase-Sensitive Quantum Measurement without Controlled Operations.
Yi-Long Yang, Arthur Christianen, M. Bañuls +2 more·Aug 21, 2023
Many quantum algorithms rely on the measurement of complex quantum amplitudes. Standard approaches to obtain the phase information, such as the Hadamard test, give rise to large overheads due to the need for global controlled-unitary operations. We i...
Protocol for nearly deterministic parity projection on two photonic qubits
Chenxu Liu, R. Frantzeskakis, S. Economou +1 more·Aug 17, 2023
Photonic parity projection plays an important role in photonic quantum information processing. Nondestructive parity projections normally require high-fidelity controlled-Z gates between photonic and matter qubits, which can be experimentally demandi...
Near-Minimal Gate Set Tomography Experiment Designs
Corey I. Ostrove, K. Rudinger, Stefan K. Seritan +2 more·Aug 17, 2023
Gate set tomography (GST) is a technique for self-consistently and precisely estimating the entire gate set of a quantum processor. GST carries nontrivial experimental cost, and as such the use of GST in practice has so far been limited to characteri...
Autonomous Stabilization of Fock States in an Oscillator against Multiphoton Losses.
Sai Li, Zhongchu Ni, Libo Zhang +8 more·Aug 16, 2023
Fock states with a well-defined number of photons in an oscillator have shown a wide range of applications in quantum information science. Nonetheless, their usefulness has been marred by single and multiphoton losses due to unavoidable environment-i...
Sequence Processing with Quantum Tensor Networks
Carys Harvey, Richie Yeung, K. Meichanetzidis·Aug 15, 2023
We introduce complex-valued tensor network models for sequence processing motivated by correspondence to probabilistic graphical models, interpretability and resource compression. Inductive bias is introduced to our models via network architecture, a...
Entanglement, Quantum Correlators, and Connectivity in Graph States
Arthur Vesperini, R. Franzosi·Aug 15, 2023
This work presents a comprehensive exploration of the entanglement and graph connectivity properties of Graph States (GSs). Qubit entanglement in Pseudo Graph States (PGSs) is quantified using the Entanglement Distance (ED), a recently introduced mea...
Natural Orbitals and Sparsity of Quantum Mutual Information.
Leonardo Ratini, Chiara Capecci, L. Guidoni·Aug 15, 2023
Natural orbitals, defined in electronic structure and quantum chemistry as the molecular orbitals diagonalizing the one-particle reduced density matrix of the ground state, have been conjectured for decades to be the perfect reference orbitals to des...
Single Qubit State Estimation on NISQ Devices with Limited Resources and SIC-POVMs
Cristian A. Galvis-Florez, Daniel Reitzner, Simo Särkkä·Aug 15, 2023
Current quantum computers have the potential to overcome classical computational methods, however, the capability of the algorithms that can be executed on noisy intermediate-scale quantum devices is limited due to hardware imperfections. Estimating ...
Error-Resilience Phase Transitions in Encoding-Decoding Quantum Circuits.
X. Turkeshi, P. Sierant·Aug 11, 2023
Understanding how errors deteriorate the information encoded in a many-body quantum system is a fundamental problem with practical implications for quantum technologies. Here, we investigate a class of encoding-decoding random circuits subject to loc...
Protocols to measure the non-Abelian Berry phase by pumping a spin qubit through a quantum-dot loop
Baksa Kolok, Andr'as P'alyi·Aug 10, 2023
A quantum system constrained to a degenerate energy eigenspace can undergo a nontrival time evolution upon adiabatic driving, described by a non-Abelian Berry phase. This type of dynamics may provide logical gates in quantum computing that are robust...
Universal imaginary-time critical dynamics on a quantum computer
Shenmin Zhang, Shuai Yin·Aug 10, 2023
Quantum computers promise a highly efficient approach to investigate quantum phase transitions, which describe abrupt changes between different ground states of many-body systems. At quantum critical points, the divergent correlation length and entan...