Papers
Live trends in quantum computing research, updated daily from arXiv.
Total Papers
28,188
This Month
0
Today
0
Research Volume
13,370 papers in 12 months (+7% vs prior quarter)
Research Focus Areas
Papers by research theme (12 months). Hover for details.
Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Pseudo Quantum Random Number Generator with Quantum Permutation Pad
Randy Kuang, Dafu Lou, Alex He +2 more·Oct 1, 2021
Cryptographic random number generation is critical for any quantum-safe encryption. Based on the natural uncertainty of some quantum processes, a variety of quantum random number generators, or QRNGs, have been created with physical quantum processes...
Truncated phase-based quantum arithmetic: Error propagation and resource reduction
G. White, C. Hill, L. Hollenberg·Oct 1, 2021
There are two important, and potentially interconnecting, avenues to the realisation of large-scale quantum algorithms: improvement of the hardware, and reduction of resource requirements demanded by algorithm components. In focusing on the latter, o...
Divide-and-conquer verification method for noisy intermediate-scale quantum computation
Yuki Takeuchi, Y. Takahashi, T. Morimae +1 more·Sep 30, 2021
<jats:p>Several noisy intermediate-scale quantum computations can be regarded as logarithmic-depth quantum circuits on a sparse quantum computing chip, where two-qubit gates can be directly applied on only some pairs of qubits. In this paper, we prop...
Mitigating errors by quantum verification and postselection
R. Mezher, James Mills, E. Kashefi·Sep 29, 2021
Correcting errors due to noise in quantum circuits run on current and near-term quantum hardware is essential for any convincing demonstration of quantum advantage. Indeed, in many cases it has been shown that noise renders quantum circuits efficient...
Bounds on stabilizer measurement circuits and obstructions to local implementations of quantum LDPC codes
Nicolas Delfosse, M. Beverland, Maxime Tremblay·Sep 29, 2021
In this work we establish lower bounds on the size of Clifford circuits that measure a family of commuting Pauli operators. Our bounds depend on the interplay between a pair of graphs: the Tanner graph of the set of measured Pauli operators, and the ...
Designing the Quantum Channels Induced by Diagonal Gates
Jingzhen Hu, Q. Liang, R. Calderbank·Sep 28, 2021
The challenge of quantum computing is to combine error resilience with universal computation. Diagonal gates such as the transversal T gate play an important role in implementing a universal set of quantum operations. This paper introduces a framewor...
Protocol for temperature sensing using a three-level transmon circuit
A. Sultanov, M. Kuzmanović, A. V. Lebedev +1 more·Sep 28, 2021
We present a method for in situ temperature measurement of superconducting quantum circuits, by using the first three levels of a transmon device to which we apply a sequence of π gates. Our approach employs projective dispersive readout and utilizes...
Switch networks for photonic fusion-based quantum computing
Sara Bartolucci, P. Birchall, D. Bonneau +6 more·Sep 28, 2021
Fusion-based quantum computing (FBQC) offers a powerful approach to building a fault-tolerant universal quantum computer using photonic components — single-photon sources, linear-optical circuits, single-photon detectors, and optical switching with f...
Efficient experimental characterization of quantum processes via compressed sensing on an NMR quantum processor
Akshay Gaikwad, Arvind, K. Dorai·Sep 27, 2021
We employ the compressed sensing (CS) algorithm and a heavily reduced data set to experimentally perform true quantum process tomography (QPT) on an NMR quantum processor. We obtain the estimate of the process matrix χ\documentclass[12pt]{minimal} \u...
Quantum Identity-Based Encryption from the Learning with Errors Problem
Wenhua Gao, Li Yang, Daode Zhang +1 more·Sep 26, 2021
To prevent eavesdropping and tampering, network security protocols take advantage of asymmetric ciphers to establish session-specific shared keys with which further communication is encrypted using symmetric ciphers. Commonly used asymmetric algorith...
Quantum State Preparation for the Schwinger Model
Giovanni Pederiva, A. Bazavov, Brandon Henke +4 more·Sep 24, 2021
It is not possible, using standard lattice techniques in Euclidean space, to calculate the complete fermionic spectrum of a quantum field theory. Algorithms running on quantum computers have the potential to access the theory with real-time evolution...
Any-To-Any Connected Cavity-Mediated Architecture for Quantum Computing with Trapped Ions or Rydberg Arrays
Joshua Ramette, Josiah Sinclair, Z. Vendeiro +3 more·Sep 23, 2021
We propose a hardware architecture and protocol for connecting many local quantum processors contained within an optical cavity. The scheme is compatible with trapped ions or Rydberg arrays, and realizes teleported gates between any two qubits by dis...
Practical considerations for the preparation of multivariate Gaussian states on quantum computers
C. Bauer, Platon C. Deliyannis, M. Freytsis +1 more·Sep 22, 2021
We provide explicit circuits implementing the Kitaev–Webb algorithm [1] for the preparation of multi-dimensional Gaussian states on quantum computers. While asymptotically efficient due to its polynomial scaling, we find that the circuits implementin...
Reduction of circuit depth by mapping qubit-based quantum gates to a qudit basis
Pamela Rambow, M. Tian·Sep 21, 2021
We present a scalable set of universal and multiply controlled gates in a qudit basis through a bijective mapping from N qubits to qudits with 𝐷 = 2 𝑁 levels via rotations in 𝑈(2) . For each of the universal gates ( H , CNOT , and T ), as well as ...
Preparing Renormalization Group Fixed Points on NISQ Hardware
Troy J. Sewell, S. Jordan·Sep 20, 2021
Noisy intermediate-scale quantum (NISQ) hardware [1] is typically limited to lowdepth quantum circuits to limit the number of opportunities for introduction of error by unreliable quantum gates. A less-explored alternative approach is to repeatedly a...
Improved graph formalism for quantum circuit simulation
Alexander Tianlin Hu, A. Khesin·Sep 20, 2021
Improving the simulation of quantum circuits on classical computers is important for understand-ing quantum advantage and increasing development speed. In this paper, we explore a new way to express stabilizer states and further improve the speed of ...
Low-depth amplitude estimation on a trapped-ion quantum computer
Tudor Giurgică-Tiron, S. Johri, Iordanis Kerenidis +6 more·Sep 20, 2021
Amplitude estimation is a fundamental quantum algorithmic primitive that enables quantum computers to achieve quadratic speedups for a large class of statistical estimation problems, including Monte Carlo methods. The main drawback from the perspecti...
Decoding the Entanglement Structure of Monitored Quantum Circuits
B. Yoshida·Sep 17, 2021
Given an output wavefunction of a monitored quantum circuit consisting of both unitary gates and projective measurements, we ask whether two complementary subsystems are entangled or not. For Clifford circuits, we find that this question can be mappe...
Quantum Lego: Building Quantum Error Correction Codes from Tensor Networks
ChunJun Cao, Brad Lackey·Sep 16, 2021
We introduce a flexible and graphically intuitive framework that constructs complex quantum error correction codes from simple codes or states, generalizing code concatenation. More specifically, we represent the complex code constructions as tensor ...
A Partially Random Trotter Algorithm for Quantum Hamiltonian Simulations
Shi Jin, Xiantao Li·Sep 16, 2021
Given the Hamiltonian, the evaluation of unitary operators has been at the heart of many quantum algorithms. Motivated by existing deterministic and random methods, we present a hybrid approach, where Hamiltonians with large amplitude are evaluated a...