Spin-bearing molecules as optically addressable platforms for quantum technologies by Kuppusamy Senthil Kumar, Hunger David, Ruben Mario, Goldner Philippe, Serrano Diana

Subjects: Get full text

Simulating Quantum Field Theories on Gate-Based Quantum Computers by Gayathree M. Vinod, Anil Shaji

Subjects: “…Bosonic qubit operators…”
Get full text

High-rate quantum LDPC codes for long-range-connected neutral atom registers by Laura Pecorari, Sven Jandura, Gavin K. Brennen, Guido Pupillo

“…Abstract High-rate quantum error correcting (QEC) codes with moderate overheads in qubit number and control complexity are highly desirable for achieving fault-tolerant quantum computing. …”
Get full text

LDPC-cat codes for low-overhead quantum computing in 2D by Diego Ruiz, Jérémie Guillaud, Anthony Leverrier, Mazyar Mirrahimi, Christophe Vuillot

“…Abstract The main obstacle to large scale quantum computing are the errors present in every physical qubit realization. Correcting these errors requires a large number of additional qubits. …”
Get full text

Experimental demonstration of complete quantum information masking and generalization of quantum secret sharing by Zhi-Feng Liu, Wei-Min Shang, Jia-Min Xu, Zi-Mo Cheng, Wen-Zheng Zhu, Hao Li, Pei Wan, Shu-Tian Xue, Yan-Chao Lou, Chao Chen, Zhi-Cheng Ren, He Lu, Fu-Lin Zhang, Jing-Ling Chen, Xi-Lin Wang, Hui-Tian Wang

“…However, the realization of complete QIM, even for single-qubit encoded information, is still lacking. Here, we propose to demonstrate complete QIM with 4-qubit entangled states. …”
Get full text

Two-Party Quantum Private Comparison Protocol Based on Rotational Encryption by Min Hou, Yue Wu

“…Specifically, our protocol achieves a qubit efficiency of 50% by using two single photons to compare one bit of classical information, and single photons are easier to prepare than multi-qubit and d-dimensional quantum states.…”
Get full text

Tantalum airbridges for scalable superconducting quantum processors by Kunliang Bu, Sainan Huai, Zhenxing Zhang, Dengfeng Li, Yuan Li, Jingjing Hu, Xiaopei Yang, Maochun Dai, Tianqi Cai, Yi-Cong Zheng, Shengyu Zhang

“…The median single-qubit gate fidelity is measured at 99.95(2)% for isolated Randomized Benchmarking and 99.94(2)% for the simultaneous one. …”
Get full text

Memory-corrected quantum repeaters with adaptive syndrome identification by Alena Romanova, Peter van Loock

“…Subsequently, we apply our results to calculate lower bounds on the asymptotic secret key rate in memory-corrected quantum repeaters when using the five-qubit or Steane codes on the memory qubits. The five-qubit code drastically increases the effective memory coherence time, reducing a phase flip probability of 1% to 0.001% when employing an error syndrome identification adapted to the quantum noise channel. …”
Get full text

Optimizing the Electrical Interface for Large-Scale Color-Center Quantum Processors by Luc Enthoven, Masoud Babaie, Fabio Sebastiano

“…Following the derived requirements, different system architectures, such as a qubit frequency-multiplexing scheme, are considered to identify the most power efficient approach, especially in the presence of inhomogeneity of the qubit Larmor frequency across the processor. …”
Get full text

Linear gate bounds against natural functions for position-verification by Vahid Asadi, Richard Cleve, Eric Culf, Alex May

“…We prove the number of quantum gates plus single qubit measurements needed to implement a function $f$ is lower bounded linearly by the communication complexity of $f$ in the simultaneous message passing model with shared entanglement. …”
Get full text

Bipartite polygon models: entanglement classes and their nonlocal behaviour by Mayalakshmi Kolangatt, Thigazholi Muruganandan, Sahil Gopalkrishna Naik, Tamal Guha, Manik Banik, Sutapa Saha

“…Remarkably, our findings highlight a closer analogy between odd polygon models and the qubit state space in terms of their bipartite Hardy nonlocal behavior compared to even-sided polygons. …”
Get full text

Flexible Threshold Quantum Homomorphic Encryption on Quantum Networks by Yongli Tang, Menghao Guo, Binyong Li, Kaixin Geng, Jinxia Yu, Baodong Qin

“…In this paper, we propose a novel <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mo>(</mo><mi>t</mi><mo>,</mo><mspace width="4.pt"></mspace><mi>n</mi><mo>)</mo></mrow></semantics></math></inline-formula>-threshold QHE (TQHE) network scheme based on the Shamir secret sharing protocol, which allows <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>k</mi><mspace width="4.pt"></mspace><mo>(</mo><mi>t</mi><mo>≤</mo><mi>k</mi><mo>≤</mo><mi>n</mi><mo>)</mo></mrow></semantics></math></inline-formula> evaluators to collaboratively perform evaluation computation operations on each qubit within the shared encrypted sequence. Moreover, each evaluator, while possessing the ability to perform all single-qubit unitary operations, is able to perform arbitrary single-qubit gate computation task assigned by the data owner. …”
Get full text

Benchmarking Quantum Circuit Transformation With QKNOB Circuits by Sanjiang Li, Xiangzhen Zhou, Yuan Feng

“…To enable faithful evaluation of state-of-the-art QCT algorithms, this article introduces qubit mapping benchmark with known near-optimality (QKNOB), a novel benchmark construction method for QCT. …”
Get full text

Convergence and Quantum Advantage of Trotterized MERA for Strongly-Correlated Systems by Qiang Miao, Thomas Barthel

“…For the Trotter circuits being composed of single-qubit and two-qubit rotations, it is experimentally advantageous to have small rotation angles. …”
Get full text

Quantum Computation via Multiport Discretized Quantum Fourier Optical Processors by Mohammad Rezai, Jawad A. Salehi

“…For instance, we demonstrate the principle by implementing the single-qubit Hadamard and the two-qubit controlled-<sc>not</sc> gates via simulation and optimization techniques. …”
Get full text

Hardware-efficient preparation of architecture-specific graph states on near-term quantum computers by Sebastian Brandhofer, Ilia Polian, Stefanie Barz, Daniel Bhatti

“…For a linear eight-qubit graph state, the error is reduced by 6.4x on average. …”
Get full text

Understanding Logical-Shift Error Propagation in Quanvolutional Neural Networks by Marzio Vallero, Emanuele Dri, Edoardo Giusto, Bartolomeo Montrucchio, Paolo Rech

“…Our detailed analysis shows that corruptions in the qubits&#x0027; state that alter their probability amplitude are more critical than the ones altering their phase, that some object classes are more likely than others to be corrupted, that the criticality of subgrids depends on the dataset, and that the control qubits, once corrupted, are more likely to modify the QNN output than the target qubits.…”
Get full text

An improved quantum-inspired particle swarm optimisation approach to reduce energy consumption in IoT networks by Yousra Mahmoudi, Nadjet Zioui, Hacène Belbachir

“…By encoding particles as n-qubit systems and employing quantum-inspired motion through qubit rotations along with an inertial damping factor, QIPSOC enhances solution diversity, mitigates premature convergence to local optima, and guides the exploration of the solution space to achieve significant energy savings, ranging from 17.99 % to over 91 %, depending on the network configuration. …”
Get full text

Noise Robustness of Quantum Relaxation for Combinatorial Optimization by Kentaro Tamura, Yohichi Suzuki, Rudy Raymond, C. Hiroshi Watanabe, Yuki Sato, Ruho Kondo, Michihiko Sugawara, Naoki Yamamoto

“…Quantum random-access optimization (QRAO) is a quantum-relaxation-based optimizer that uses fewer qubits than the number of bits in the original problem by encoding multiple variables per qubit using quantum random-access code (QRAC). …”
Get full text

Limitations to Dynamical Error Suppression and Gate-Error Virtualization from Temporally Correlated Nonclassical Noise by Michiel Burgelman, Nattaphong Wonglakhon, Diego N. Bernal-García, Gerardo A. Paz-Silva, Lorenza Viola

“…We find that only if decoupling can keep the qubit highly pure over a time scale larger than the correlation time of the noise, the bath approximately converges to its original statistics and a stable-in-time control performance is recovered. …”
Get full text