Papers
Live trends in quantum computing research, updated daily from arXiv.
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Imaginary gauge potentials in a non-Hermitian spin-orbit coupled quantum gas
Junheng Tao, Emmanuel Mercado-Gutierrez, Mingshu Zhao +1 more·Apr 11, 2025
In 1996, Hatano and Nelson proposed a non-Hermitian lattice model containing an imaginary Peierls phase [Phys. Rev. Lett. 77 570-573 (1996)], which subsequent analyses revealed to be an instance of a new class of topological systems. Here, we experim...
Shot noise signatures of candidate states for the fractional quantum Hall <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>ν</mml:mi><mml:mo>=</mml:mo><mml:mfrac><mml:mn>12</mml:mn><mml:mn>5</mml:mn></mml:mfrac></mml:mrow></mml:math> state
Goutham Vinjamuri, Ankur Das·Apr 8, 2025
Fractional quantum Hall (FQH) states are highly sought after because of their ability to host non-abelian anyons, whose braiding statistics make them excellent candidates for qubits in topological quantum computing. Multiple theoretical studies on th...
Inter-species topological phases via a dynamical gauge field
Zhoutao Lei, Linhu Li·Apr 7, 2025
We uncover a class of inter-species topological phases in a one-dimensional lattice, loaded with two species of non-identical particles interacting via a dynamical gauge field (DGF). Two types of topological states are found to emerge from different ...
Quantum walk with coherent multiple translations induces fast quantum gate operations
Yixi Zhang, Xin Qiao, Luojia Wang +4 more·Apr 7, 2025
Quantum walks with one-dimensional translational symmetry are important for quantum algorithms, where the speed-up of the diffusion speed can be reached if long-range couplings are added. Our work studies a scheme of a ring under the strong resonant ...
Symmetrizing the constraints: Density matrix renormalization group for constrained lattice models
Ting-Tung Wang, Xiaoxue Ran, Z. Y. Meng·Apr 5, 2025
We develop a density matrix renormalization group (DMRG) algorithm for constrained quantum lattice models that successfully {\it{implements the local constraints as symmetries in the contraction of the matrix product states and matrix product operato...
Independent e- and m-anyon confinement in the parallel field toric code on non-square lattices
Simon M. Linsel, Lode Pollet, Fabian Grusdt·Apr 4, 2025
Kitaev's toric code has become one of the most studied models in physics and is highly relevant to the fields of both quantum error correction and condensed matter physics. Most notably, it is the simplest known model hosting an extended, deconfined ...
Asymptotic Exceptional Steady States in Dissipative Dynamics
Yu-Min Hu, Jan Carl Budich·Apr 3, 2025
Spectral degeneracies in Liouvillian generators of dissipative dynamics generically occur as exceptional points, where the corresponding non-Hermitian operator becomes non-diagonalizable. Steady states, i.e. zero-modes of Liouvillians, are considered...
Observation of dislocation bound states and skin effects in non-Hermitian Chern insulators
Jia-Xin Zhong, Bitan Roy, Yun Jing·Apr 3, 2025
The confluence of non-Hermitian (NH) topology and crystal defects has culminated significant interest, yet its experimental exploration has been limited due to the challenges involved in design and measurements. Here, we showcase experimental observa...
QUITS: A modular Qldpc code circUIT Simulator
Mingyu Kang, Yingjia Lin, Hanwen Yao +3 more·Apr 3, 2025
To achieve quantum fault tolerance with lower overhead, quantum low-density parity-check (QLDPC) codes have emerged as a promising alternative to topological codes such as the surface code, offering higher code rates. To support their study, an end-t...
Bubble Clustering Decoder for Quantum Topological Codes
Diego Forlivesi, L. Valentini, M. Chiani·Apr 2, 2025
Quantum computers are highly vulnerable to noise, necessitating the use of error-correcting codes to protect stored data. Errors must be continuously corrected over time to counteract decoherence using appropriate decoders. Therefore, fast decoding s...
Loschmidt echo zeros in finite-size quantum systems with linear quench
Zhen-Yu Zheng, Xudong Liu, Siyan Lin +2 more·Apr 1, 2025
Dynamical quantum phase transitions reveal singularities in quench dynamics, characterized by the emergence of Loschmidt echo zeros at critical times, which usually exist only in the thermodynamic limit but are absent in finite-size quantum systems. ...
Problem-Structure-Informed Quantum Approximate Optimization Algorithm for Large-Scale Unit Commitment with Limited Qubits
Jingxian Zhou, Ziqing Zhu, Linghua Zhu +1 more·Mar 26, 2025
As power systems expand, solving the Unit Commitment Problem (UCP) becomes increasingly challenging due to the dimensional catastrophe, and traditional methods often struggle to balance computational efficiency and solution quality. To tackle this is...
Gauging Modulated Symmetries via Multiple Gauge Symmetry Operators and Adaptive Quantum Circuits
Jintae Kim, Jong Yeon Lee, Jung Hoon Han·Mar 20, 2025
We introduce an extended framework for the simultaneous gauging of modulated symmetries in $(d+1)$ dimensions, employing {\it multiple} gauge symmetry operators whose corresponding gauging procedures must be carried out simultaneously. Simultaneous g...
Tight-binding energy-phase calculation for topological Josephson junction nanowire architecture
Adrian D. Scheppe, Michael V. Pak·Mar 20, 2025
The current state of Quantum computing (QC) is extremely optimistic, and we are at a point where researchers have produced highly sophisticated quantum algorithms to address far reaching problems. However, it is equally apparent that the noisy quantu...
Polarization-dependent topology in quantum emitter chains
Jonathan Sturm, Adriana Pálffy·Mar 18, 2025
The role of polarization in the topology of quantum emitter chains is investigated theoretically, whereby "polarization" refers to the transition dipole moments of the emitters. We show that, if the chain is zigzag-shaped, different topological phase...
Realization of fermionic Laughlin state on a quantum processor
L. Shen, Mao Lin, Cedric Yen-Yu Lin +2 more·Mar 17, 2025
Strongly correlated topological phases of matter are central to modern condensed matter physics and quantum information technology but often challenging to probe and control in material systems. The experimental difficulty of accessing these phases h...
Chiral cat code: Enhanced error correction induced by higher-order nonlinearities
Adrià Labay-Mora, Alberto Mercurio, Vincenzo Savona +2 more·Mar 14, 2025
We introduce a Schr\"odinger chiral cat qubit, a novel bosonic quantum code generalizing Kerr cat qubits that exploits higher-order nonlinearities. Compared to a standard Kerr cat, the chiral cat qubit allows additional correction of bit-flip errors ...
Finding Hidden Numbers with Majorana-based Topological Quantum Algorithms: Simulation of the Bernstein-Vazirani Algorithm
Jasmin Bedow, D. Morr·Mar 13, 2025
Executing quantum algorithms using Majorana zero modes - a major milestone for the field of topological quantum computing - requires a platform that can be scaled to large quantum registers, can be controlled in real time and space, and a braiding pr...
Fusion Dynamics of Majorana Zero Modes
Themba Hodge, Tuan Kieu, Jasmin Bedow +3 more·Mar 12, 2025
Braiding and fusion of Majorana zero modes are key elements of any future topological Majorana-based quantum computer. Here, we investigate the fusion dynamics of Majorana zero modes in the spinless Kitaev model, as well as in a spinful model describ...
Geometric quantum drives and topological dynamical responses: hyperbolically-driven quantum systems and beyond
Jihong Wu, Chuan Liu, Daniel Bulmash +1 more·Mar 11, 2025
We introduce a geometrical framework to construct a large class of time-dependent quantum systems, in which the position of a classical particle moving autonomously on a smooth connected manifold is used to steer a quantum Hamiltonian over time. This...