Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
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...
One Gate Scheme to Rule Them All: Introducing a Complex Yet Reduced Instruction Set for Quantum Computing
Jianxin Chen, D. Ding, Weiyuan Gong +2 more·Dec 9, 2023
The design and architecture of a quantum instruction set are paramount to the performance of a quantum computer. This work introduces a gate scheme for qubits with XX + YY coupling that directly and efficiently realizes any two-qubit gate up to singl...
Comprehensive Analysis of BB84, A Quantum Key Distribution Protocol
SujayKumar Reddy, C. Mohan·Dec 9, 2023
Quantum Key Distribution (QKD) is a technique that enables secure communication between two parties by sharing a secret key. One of the most well-known QKD protocols is the BB84 protocol, proposed by Charles Bennett and Gilles Brassard in 1984. In th...
Enhancing the electron pair approximation with measurements on trapped-ion quantum computers
Luning Zhao, Q. Wang, Joshua J. Goings +5 more·Dec 9, 2023
The electron pair approximation offers an efficient variational quantum eigensolver (VQE) approach for chemistry simulations on quantum computers. With the number of entangling gates scaling quadratically with system size and a constant measurement o...
Optical probing of phononic properties of a tin-vacancy color center in diamond
Cem Güney Torun, Joseph H. D. Munns, Franziska Marie Herrmann +12 more·Dec 8, 2023
The coherence characteristics of a tin-vacancy color center (SnV) in diamond are investigated through optical means, including linewidth broadening effects and coherent population trapping (CPT) between the ground state orbital levels. Spectral analy...
SUPER and femtosecond spin-conserving coherent excitation of a tin-vacancy color center in diamond
Cem Güney Torun, Mustafa Gökçe, Thomas K. Bracht +11 more·Dec 8, 2023
The coherent excitation of an optically active spin system is one of the key elements in the engineering of a spin-photon interface. Using the novel SUPER scheme, we coherently control the main optical transition of a tin-vacancy color center in diam...
Robust entanglement buffers based on SWAP interactions
Ye-Chao Liu, Otfried Gühne, Stefan Nimmrichter·Dec 8, 2023
Quantum entanglement is the essential resource for quantum communication and distributed information processing in a quantum network. However, the remote generation over a network suffers from inevitable transmission loss and other technical difficul...
Enhanced quantum sensing mediated by a cavity in open systems
Quinn Langfitt, Zain H. Saleem, Tian Zhong +2 more·Dec 8, 2023
We simulate the dynamics of systems with $N$ = 1-20 qubits coupled to a cavity in order to assess their potential for quantum metrology of a parameter in the open systems limit. The qubits and the cavity are both allowed to have losses and the system...
Large Spin Stern-Gerlach Interferometry for Gravitational Entanglement
Lorenzo Braccini, M. Schut, Alessio Serafini +2 more·Dec 8, 2023
Recently, there has been a proposal to test the quantum nature of gravity in the laboratory by witnessing the growth of entanglement between two masses in spatial quantum superpositions. The required superpositions can be created via Stern-Gerlach in...
Accurate harmonic vibrational frequencies for diatomic molecules via quantum computing
Shih-Kai Chou, J. Chou, A. Hu +2 more·Dec 8, 2023
During the noisy intermediate-scale quantum (NISQ) era, quantum computational approaches refined to overcome the challenge of limited quantum resources are highly valuable. However, the accuracy of the molecular properties predicted by most of the qu...
Global variational quantum circuits for arbitrary symmetric state preparation
Liam J. Bond, Matthew J. Davis, Jiří Minář +3 more·Dec 8, 2023
Quantum states that are symmetric under particle exchange play a crucial role in fields such as quantum metrology and quantum error correction. We use a variational circuit composed of global one-axis twisting and global rotations to efficiently prep...
Lecture Notes on Quantum Electrical Circuits
A. Ciani, D. DiVincenzo, B. Terhal·Dec 8, 2023
During the last 30 years, stimulated by the quest to build superconducting quantum processors, a theory of quantum electrical circuits has emerged, and this theory goes under the name of circuit quantum electrodynamics or circuit-QED. The theory aims...
Quantum Algorithms for Simulating Nuclear Effective Field Theories
James D. Watson, Jacob Bringewatt, Alexander F. Shaw +3 more·Dec 8, 2023
Quantum computers offer the potential to simulate nuclear processes that are classically intractable. With the goal of understanding the necessary quantum resources to realize this potential, we employ state-of-the-art Hamiltonian-simulation methods,...
A universal scheme to self-test any quantum state or measurement
Shubhayan Sarkar, Alexandre C. Orthey,, Remigiusz Augusiak·Dec 7, 2023
The emergence of quantum devices has raised a significant issue: how to certify the quantum properties of a device without placing trust in it. To characterise quantum states and measurements in a device-independent way, up to some degree of freedom,...
General teleportation channel in Fermionic Quantum Theory
Sanam Khan, R. Jehadeesan, Sibasish Ghosh·Dec 7, 2023
Quantum Teleportation is a very useful scheme for transferring quantum information. Given that the quantum information is encoded in a state of a system of distinguishable particles, and given that the shared bi-partite entangled state is also that o...
Solving the Lipkin model using quantum computers with two qubits only with a hybrid quantum-classical technique based on the generator coordinate method
Yann Beaujeault-Taudière, Denis Lacroix·Dec 7, 2023
The possibility of using the generator coordinate method (GCM) using hybrid quantum-classical algorithms with reduced quantum resources is discussed. The task of preparing the basis states and calculating the various kernels involved in the GCM is as...
Superconducting processor design optimization for quantum error correction performance
Xiaotong Ni, Ziang Wang, Rui Chao +1 more·Dec 7, 2023
In the quest for fault-tolerant quantum computation using superconducting processors, accurate performance assessment and continuous design optimization stands at the forefront. To facilitate both meticulous simulation and streamlined design optimiza...
Counting collisions in random circuit sampling for benchmarking quantum computers
Andrea Mari·Dec 7, 2023
We show that counting the number of collisions (re-sampled bitstrings) when measuring a random quantum circuit provides a practical benchmark for the quality of a quantum computer and a quantitative noise characterization method. We analytically esti...
Resource-Efficient Quantum Circuits for Molecular Simulations: A Case Study of Umbrella Inversion in Ammonia
R. NirmalM., S. Yamijala, Kalpak Ghosh +2 more·Dec 7, 2023
We conducted a thorough evaluation of various state-of-the-art strategies to prepare the ground state wavefunction of a system on a quantum computer, specifically within the framework of variational quantum eigensolver (VQE). Despite the advantages o...
Fault-Tolerant One-Way Noiseless Amplification for Microwave Bosonic Quantum Information Processing
Hany Khalifa, Riku Jäntti, G. Paraoanu·Dec 7, 2023
Microwave quantum information networks require reliable transmission of single-photon propagating modes over lossy channels. In this article, we propose a microwave noiseless linear amplifier (NLA) suitable to circumvent the losses incurred by a flyi...