Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Generation of large amplitude phonon states in quantum acoustics
C. Potts, W.J.M. Franse, V.A.S.V. Bittencourt +2 more·Dec 21, 2023
The development of quantum acoustics has enabled the cooling of mechanical objects to their quantum ground state, generation of mechanical Fock-states, and Schrödinger cat states. Such demonstrations have made mechanical resonators attractive candida...
Optical decoder learning for fiber communication at the quantum limit
Matteo Rosati, A. Solana·Dec 21, 2023
Quantum information theory predicts that communication technology can be enhanced by using quantum signals to transfer classical bits. In order to fulfill this promise, the message-carrying signals must interact coherently at the decoding stage via a...
Reassessing the advantage of indefinite causal orders for quantum metrology
Raphael Mothe, C. Branciard, A. Abbott·Dec 19, 2023
The quantum switch, the canonical example of a process with indefinite causal order, has been claimed to provide various advantages over processes with definite causal orders for some particular tasks in the field of quantum metrology. In this work, ...
Pauli spectrum and nonstabilizerness of typical quantum many-body states
X. Turkeshi, A. Dymarsky, P. Sierant·Dec 18, 2023
An important question of quantum information is to characterize genuinely quantum (beyond-Clifford) resources necessary for universal quantum computing. Here, we use the Pauli spectrum to quantify how magic, beyond Clifford, typical many-qubit states...
Disentangling the physics of the attractive Hubbard model as a fully interacting model of fermions via the accessible and symmetry-resolved entanglement entropies
Tong Shen, H. Barghathi, A. Del Maestro +1 more·Dec 18, 2023
The complicated ways in which electrons interact in many-body systems such as molecules and materials have long been viewed through the lens of local electron correlation and associated correlation functions. However, quantum information science has ...
Comparing Shor and Steane error correction using the Bacon-Shor code
Shilin Huang, Kenneth R. Brown, Marko Cetina·Dec 17, 2023
Quantum states decohere through interaction with the environment. Quantum error correction can preserve coherence through active feedback wherein quantum information is encoded into a logical state with a high degree of symmetry. Perturbations are de...
Learning, Optimizing, and Simulating Fermions with Quantum Computers
Andrew Zhao·Dec 16, 2023
Fermions are fundamental particles which obey seemingly bizarre quantum-mechanical principles, yet constitute all the ordinary matter that we inhabit. As such, their study is heavily motivated from both fundamental and practical incentives. In this d...
Reconfigurable quantum photonic circuits based on quantum dots
Adam McCaw, Jacob Ewaniuk, B. Shastri +1 more·Dec 16, 2023
Abstract Quantum photonic integrated circuits, composed of linear-optical elements, offer an efficient way for encoding and processing quantum information on-chip. At their core, these circuits rely on reconfigurable phase shifters, typically constru...
Demonstration of Fault-Tolerant Steane Quantum Error Correction
L. Postler, Friederike Butt, Ivan Pogorelov +7 more·Dec 15, 2023
Encoding information redundantly using quantum error-correcting (QEC) codes allows one to overcome the inherent sensitivity to noise in quantum computers to ultimately achieve large-scale quantum computation. The Steane QEC method involves preparing ...
Does provable absence of barren plateaus imply classical simulability?
M. Cerezo, Martín Larocca, Diego Garc'ia-Mart'in +9 more·Dec 14, 2023
A large amount of effort has recently been put into understanding the barren plateau phenomenon. In this perspective article, we face the increasingly loud elephant in the room and ask a question that has been hinted at by many but not explicitly add...
Vacuum Beam Guide for Large Scale Quantum Networks.
Yuexun Huang, F. Salces-Cárcoba, R. Adhikari +2 more·Dec 14, 2023
The vacuum beam guide (VBG) presents a completely different solution for quantum channels to overcome the limitations of existing fiber and satellite technologies for long-distance quantum communication. With an array of aligned lenses spaced kilomet...
Radio Signal Classification by Adversarially Robust Quantum Machine Learning
Yanqiu Wu, Eromanga Adermann, Chandra Thapa +3 more·Dec 13, 2023
Radio signal classification plays a pivotal role in identifying the modulation scheme used in received radio signals, which is essential for demodulation and proper interpretation of the transmitted information. Researchers have underscored the high ...
Toolbox for nonreciprocal dispersive models in circuit QED
Lautaro Labarca, Othmane Benhayoune-Khadraoui, A. Blais +1 more·Dec 13, 2023
We provide a systematic method for constructing effective dispersive Lindblad master equations to describe weakly anharmonic superconducting circuits coupled by a generic dissipationless nonreciprocal linear system, with effective coupling parameters...
Understanding disorder in silicon quantum computing platforms: Scattering mechanisms in Si/SiGe quantum wells
Yi Huang, S. Das Sarma·Dec 12, 2023
Motivated by recent experiments on Si/SiGe quantum wells with a co-design of high electron mobility and large valley splitting [B. Paquelet Wuetz, et al., Nature Communications 14, 1385 (2023); D. D. Esposti, et al., arXiv:2309.02832], suitable for a...
Error Correcting States in Ultracold Atoms
Harry C. P. Kendell, Giacaomo Ferranti, Carrie A. Weidner·Dec 12, 2023
We demonstrate a method for encoding Gottesman-Kitaev-Preskill (GKP) error-correcting qubits with single ultracold atoms trapped in individual sites of a deep optical lattice. Using quantum optimal control protocols, we demonstrate the generation of ...
Symmetric derivatives of parametrized quantum circuits
David Wierichs, R. East, Martín Larocca +2 more·Dec 11, 2023
Symmetries are crucial for tailoring parametrized quantum circuits to applications, due to their capability to capture the essence of physical systems. In this work, we shift the focus away from incorporating symmetries in the circuit design and towa...
Accurate optimal quantum error correction thresholds from coherent information
Luis Colmenarez, Ze-Min Huang, Sebastian Diehl +1 more·Dec 11, 2023
Quantum error correcting (QEC) codes protect quantum information from decoherence as long as error rates fall below critical error thresholds. In general, obtaining thresholds implies simulating the QEC procedure using, in general, suboptimal decodin...
Precise Phase Error Rate Analysis for Quantum Key Distribution with Phase Postselection
Yao Zhou, Zhen-Qiang Yin, Yong-Guang Shan +5 more·Dec 11, 2023
Quantum key distribution (QKD) stands as a pioneering method for establishing information-theoretically secure communication channels by utilizing the principles of quantum mechanics. In the security proof of QKD, the phase error rate serves as a cri...
Secure and Efficient Entanglement Distribution Protocols for Near-Term Quantum Internet
Nicholas Skjellum, Mohamed Shaban, Muhammad Ismail·Dec 10, 2023
Quantum information technology has the potential to revolutionize computing, communications, and security. To fully realize its potential, quantum processors with millions of qubits are needed, which are still far from being accomplished. Thus, it is...
Dephasing due to electromagnetic interactions in spatial qubits
M. Schut, Herre Bosma, Meng-Zhi Wu +3 more·Dec 9, 2023
Matter-wave interferometers with micro-particles will enable the next generation of quantum sensors to probe minute quantum phase information. Therefore, estimating the loss of coherence and the degree of entanglement degradation for such interferome...