Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Braiding-based quantum control of a Majorana qubit built from quantum dots
P. Boross, Andr'as P'alyi·May 15, 2023
Topology-related ideas might lead to noise-resilient quantum computing. For example, it is expected that the slow spatial exchange (`braiding') of Majorana zero modes in superconductors yields quantum gates that are robust against disorder. Here, we ...
Tunable helical crystals
R. Niyazov, D. Aristov, V. Kachorovskii·May 14, 2023
We consider a superlattice formed by tunnel-connected identical holes, periodically placed in a two-dimensional topological insulator. We study tunneling transport through helical edges of these holes and demonstrate that the band structure of such h...
Lifting Topological Codes: Three-Dimensional Subsystem Codes from Two-Dimensional Anyon Models
Jacob C. Bridgeman, Aleksander Kubica, M. Vasmer·May 10, 2023
Topological subsystem codes in three spatial dimensions allow for quantum error correction with no time overhead, even in the presence of measurement noise. The physical origins of this single-shot property remain elusive, in part due to the scarcity...
Phase diagram of the three-dimensional subsystem toric code
Yaodong Li, C. V. von Keyserlingk, Guanyu Zhu +1 more·May 10, 2023
Subsystem quantum error-correcting codes typically involve measuring a sequence of noncommuting parity check operators. They can sometimes exhibit greater fault tolerance than conventional codes, which use commuting checks. However, unlike subspace c...
Non-Abelian topological order and anyons on a trapped-ion processor
Mohsin Iqbal, Nathanan Tantivasadakarn, R. Verresen +15 more·May 5, 2023
Non-Abelian topological order is a coveted state of matter with remarkable properties, including quasiparticles that can remember the sequence in which they are exchanged1–4. These anyonic excitations are promising building blocks of fault-tolerant q...
Tensor network approach to the fully frustrated XY model on a kagome lattice with a fractional vortex-antivortex pairing transition
Fengmin Song, Guang-Ming Zhang·Apr 24, 2023
We have developed a tensor network approach to the two-dimensional fully frustrated classical XY spin model on the kagome lattice, and clarified the nature of the possible phase transitions of various topological excitations.We find that the standard...
Advancements in Superconducting Microwave Cavities and Qubits for Quantum Information Systems
A. Krasnok, P. Dhakal, A. Fedorov +3 more·Apr 18, 2023
Superconducting microwave cavities with ultra-high Q-factors are revolutionizing the field of quantum computing, offering long coherence times exceeding 1 ms, which is critical for realizing scalable multi-qubit quantum systems with low error rates. ...
A hybrid quantum algorithm to detect conical intersections
Emiel Koridon, Joana Fraxanet, A. Dauphin +3 more·Apr 12, 2023
Conical intersections are topologically protected crossings between the potential energy surfaces of a molecular Hamiltonian, known to play an important role in chemical processes such as photoisomerization and non-radiative relaxation. They are char...
High-fidelity dimer excitations using quantum hardware
N. Eassa, J. Gibbs, Zoe Holmes +7 more·Apr 12, 2023
Many-body entangled quantum spin systems exhibit emergent phenomena such as topological quantum spin liquids with distinct excitation spectra accessed in inelastic neutron scattering (INS) experiments. Here we simulate the dynamics of a quantum spin ...
Protecting information via probabilistic cellular automata.
A. Ray, R. Laflamme, Aleksander Kubica·Apr 6, 2023
Probabilistic cellular automata describe the dynamics of classical spin models, which, for sufficiently small temperature T, can serve as classical memory capable of storing information even in the presence of nonzero external magnetic field h. In th...
Topological error correcting processes from fixed-point path integrals
A. Bauer·Mar 29, 2023
We propose a unifying paradigm for analyzing and constructing topological quantum error correcting codes as dynamical circuits of geometrically local channels and measurements. To this end, we relate such circuits to discrete fixed-point path integra...
Stable computation of entanglement entropy for two-dimensional interacting fermion systems
Gaopei Pan, Yuan Da Liao, Weilun Jiang +3 more·Mar 25, 2023
There is no doubt that the information hidden in entanglement entropy (EE), for example, the $n$-th order R\'enyi EE, i.e., $S^{A}_n=\frac{1}{1-n}\ln \Tr (\rho_A^n)$ where $\rho_A=\mathrm{Tr}_{\overline{A}}\rho$ is the reduced density matrix, can be ...
Quantum memory error correction computation based on Chamon model
Jian Zhao, Yuchun Wu, Guo‐Ping Guo·Mar 9, 2023
Quantum error correction codes play a central role in the realisation of fault-tolerant quantum computing. Chamon model is a 3D generalization of the toric code. The error correction computation on this model has not been explored so far. In this wor...
Realization of higher-order topological lattices on a quantum computer
Jin Ming Koh, Tommy Tai, Ching Hua Lee·Mar 3, 2023
Programmable quantum simulators may one day outperform classical computers at certain tasks. But at present, the range of viable applications with noisy intermediate-scale quantum (NISQ) devices remains limited by gate errors and the number of high-q...
Ising model formulation for highly accurate topological color codes decoding
Yugo Takada, Yusaku Takeuchi, K. Fujii·Mar 2, 2023
Quantum error correction is an essential ingredient for reliable quantum computation for theoretically provable quantum speedup. Topological color codes, one of the quantum error correction codes, have an advantage against the surface codes in that a...
Many-Body Majorana Braiding without an Exponential Hilbert Space.
Eric Mascot, Themba Hodge, Daniel Crawford +3 more·Mar 1, 2023
Qubits built out of Majorana zero modes constitute the primary path toward topologically protected quantum computing. Simulating the braiding process of multiple Majorana zero modes corresponds to the quantum dynamics of a superconducting many-body s...
Simulation of Kitaev chain using one-dimensional chain of superconducting qubits and environmental effects on topological states
Yang Zhang, Yunhui Ge, Yu-xi Liu·Feb 8, 2023
Kitaev chain is one of the important physical models for studying topological quantum states and quantum computing. We here propose an approach to simulate the one-dimensional Kitaev chain via a circuit of superconducting qubits. In our approach, all...
Bulk-to-boundary anyon fusion from microscopic models
Julio C. Magdalena de la Fuente, Jens Eisert, A. Bauer·Feb 3, 2023
Topological quantum error correction based on the manipulation of the anyonic defects constitutes one of the most promising frameworks towards realizing fault-tolerant quantum devices. Hence, it is crucial to understand how these defects interact wit...
Topological order from measurements and feed-forward on a trapped ion quantum computer
Mohsin Iqbal, Nathanan Tantivasadakarn, T. Gatterman +13 more·Feb 3, 2023
Quantum systems evolve in time in one of two ways: through the Schrödinger equation or wavefunction collapse. So far, deterministic control of quantum many-body systems in the lab has focused on the former, due to the probabilistic nature of measurem...
Hardness of Braided Quantum Circuit Optimization in the Surface Code
Kunihiro Wasa, S. Nishio, K. Suetsugu +4 more·Feb 1, 2023
Large-scale quantum information processing requires the use of quantum error-correcting codes to mitigate the effects of noise in quantum devices. Topological error-correcting codes, such as surface codes, are promising candidates, as they can be imp...