Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Quantum Computation and Measurements from an Exotic Space-Time R4
M. Planat, Raymond Aschheim, Marcelo M. Amaral +1 more·Jan 22, 2020
The authors previously found a model of universal quantum computation by making use of the coset structure of subgroups of a free group G with relations. A valid subgroup H of index d in G leads to a ‘magic’ state ψ in d-dimensional Hilbert space tha...
Natural and bionic neuronal membranes: possible sites for quantum biology
L. Smolin·Jan 21, 2020
A new concept for bionic quantum technology is presented based on a hybrid of a silicon wafer on which is layered a phospholipid membrane, such as is found in biological cell membranes. The phosphorus atoms in the head groups of the membranes carry n...
Deep Q-learning decoder for depolarizing noise on the toric code
David Fitzek, Mattias Eliasson, A. F. Kockum +1 more·Dec 30, 2019
We present an AI-based decoding agent for quantum error correction of depolarizing noise on the toric code. The agent is trained using deep reinforcement learning (DRL), where an artificial neural network encodes the state-action Q-values of error-co...
Quantum Error Correction in Loop Quantum Gravity
D. Vaid·Dec 25, 2019
Previous works (by Almiehri, Dong, Harlow, Pastakawski, Preskill, Yoshida and others) have established that quantum error correction plays an important role in understanding how the bulk degrees of freedom of an Anti-deSitter spacetime are encoded in...
Efficient compression of quantum braided circuits
M. Hanks, M. Estarellas, W. Munro +1 more·Dec 24, 2019
Mapping a quantum algorithm to any practical large-scale quantum computer will require a sequence of compilations and optimizations. At the level of fault-tolerant encoding, one likely requirement of this process is the translation into a topological...
Framework for simulating gauge theories with dipolar spin systems
Di Luo, Jiayu Shen, Michael Highman +4 more·Dec 24, 2019
Gauge theories appear broadly in physics, ranging from the standard model of particle physics to long-wavelength descriptions of topological systems in condensed matter. However, systems with sign problems are largely inaccessible to classical comput...
Soluble limit and criticality of fermions in Z2 gauge theories
E. König, P. Coleman, A. Tsvelik·Dec 23, 2019
Quantum information theory and strongly correlated electron systems share a common theme of macroscopic quantum entanglement. In both topological error correction codes and theories of quantum materials (spin liquid, heavy fermion and high-$T_c$ syst...
Light-Driven Raman Coherence as a Nonthermal Route to Ultrafast Topology Switching in a Dirac Semimetal
C. Vaswani, Lin-Lin Wang, D. Mudiyanselage +14 more·Dec 4, 2019
A grand challenge underlies the entire field of topology-enabled quantum logic and information science: how to establish topological control principles driven by quantum coherence and understand the time-dependence of such periodic driving? Here we d...
Limitations of Clustering Using Quantum Persistent Homology
N. Neumann, S. D. Breeijen·Nov 25, 2019
Different algorithms can be used for clustering purposes with data sets. On of these algorithms, uses topological features extracted from the data set to base the clusters on. The complexity of this algorithm is however exponential in the number of da...
A Toy Model of Boundary States with Spurious Topological Entanglement Entropy
Kohtaro Kato, F. Brandão·Nov 22, 2019
Topological entanglement entropy has been extensively used as an indicator of topologically ordered phases. However, it has been observed that there exist ground states in the topologically trivial phase that has nonzero "spurious" contribution to th...
Monte Carlo studies of modified scalable designs for quantum computation
G. Feng, Jingwei Chen, Hong-Hao Zhang·Nov 15, 2019
As the building blocks of topological quantum computation, Majorana zero modes (MZMs) have attracted tremendous attention in recent years. Scalable mesoscopic island designs with MZMs show great potential in quantum information processing. However, t...
Scaling advantage in quantum simulation of geometrically frustrated magnets
A. King, Jack Raymond, T. Lanting +51 more·Nov 8, 2019
The promise of quantum computing lies in harnessing programmable quantum devices for practical applications such as efficient simulation of quantum materials and condensed matter systems. One important task is the simulation of geometrically frustrat...
Quantum entanglement, supersymmetry, and the generalized Yang-Baxter equation.
Pramod Padmanabhan, Fumihiko Sugino, Diego Trancanelli·Nov 6, 2019
Entangled states, such as the Bell and GHZ states, are generated from separable states using matrices known to satisfy the Yang-Baxter equation and its generalization. This remarkable fact hints at the possibility of using braiding operators as quant...
Majorana-based quantum computing in nanowire devices
Christian Tutschku, R. Reinthaler, C. Lei +2 more·Oct 24, 2019
The boundary of topological superconductors might lead to the appearance of Majorana edge modes, whose non-trivial exchange statistics can be used for topological quantum computing. In branched nanowire networks one can exchange Majorana states by ti...
Obstacles to State Preparation and Variational Optimization from Symmetry Protection.
S. Bravyi, A. Kliesch, Robert Koenig +1 more·Oct 20, 2019
Local Hamiltonians with topological quantum order exhibit highly entangled ground states that cannot be prepared by shallow quantum circuits. Here, we show that this property may extend to all low-energy states in the presence of an on-site $\mathbb{...
Quantum confinement of the Dirac surface states in topological-insulator nanowires
F. Münning, O. Breunig, H. F. Legg +5 more·Oct 17, 2019
The non-trivial topology of three-dimensional topological insulators dictates the appearance of gapless Dirac surface states. Intriguingly, when made into a nanowire, quantum confinement leads to a peculiar gapped Dirac sub-band structure. This gap i...
Quantum Simulation of Quantum $\mathbb{Z}_2$ Gauge Theory demonstrated in a GPU Simulator
Xiaopeng Cui, Ji-Chong Yang, Yu Shi·Oct 17, 2019
We outline a quantum simulation scheme of quantum $\mathbb{Z}_2$ gauge theory using quantum adiabatic algorithm implemented in terms of quantum circuit, and then demonstrate it in the classical simulator QuEST using a CUDA enabled GPU server. In part...
Number-conserving analysis of measurement-based braiding with Majorana zero modes
Christina Knapp, J. Väyrynen, R. Lutchyn·Sep 24, 2019
Majorana-based quantum computation seeks to encode information nonlocally in pairs of Majorana zero modes, thereby isolating qubit states from a local noisy environment. In addition to long coherence times, the attractiveness of Majorana-based quantu...
Dimensional tuning of Majorana fermions and real space counting of the Chern number
Eric Mascot, S. Cocklin, S. Rachel +1 more·Sep 12, 2019
Chiral superconductors have the ability to host topologically protected Majorana zero modes which have been proposed as future qubits for topological quantum computing. The recently introduced magnet--superconductor hybrid (MSH) systems consisting of...
Optimizing Clifford gate generation for measurement-only topological quantum computation with Majorana zero modes
Alan Tran, Alex Bocharov, B. Bauer +1 more·Sep 6, 2019
One of the main challenges for quantum computation is that while the number of gates required to perform a non-trivial quantum computation may be very large, decoherence and errors in realistic quantum architectures limit the number of physical gate ...