1.6k citations · 10.5k across the 95 of their papers we have counts for
71 papers · 1 filter
No Strings Attached: Boundaries and Defects in the Cubic Code
Cory T. Aitchison, Daniel Bulmash, Arpit Dua +2
Haah's cubic code is the prototypical type-II fracton topological order. It instantiates the no string-like operator property that underlies the favorable scaling of its code dista…
Gottesman-Kitaev-Preskill state preparation using periodic driving
Xanda C. Kolesnikow, Raditya Weda Bomantara, Andrew C. Doherty +1
The Gottesman-Kitaev-Preskill (GKP) code may be used to overcome noise in continuous variable quantum systems. However, preparing GKP states remains experimentally challenging. We…
Stabilizer subsystem decompositions for single- and multi-mode Gottesman-Kitaev-Preskill codes
Mackenzie H. Shaw, Andrew C. Doherty, Arne L. Grimsmo
The Gottesman-Kitaev-Preskill (GKP) error correcting code encodes a finite dimensional logical space in one or more bosonic modes, and has recently been demonstrated in trapped ion…
Testing Generalised Uncertainty Principles through Quantum Noise
Parth Girdhar, Andrew C. Doherty
Motivated by several approaches to quantum gravity, there is a considerable literature on generalised uncertainty principles particularly through modification of the canonical posi…
Solving quantum trajectories for systems with linear Heisenberg-picture dynamics and Gaussian measurement noise
P. Warszawski, H. M. Wiseman, A. C. Doherty
We study solutions to the quantum trajectory evolution of -mode open quantum systems possessing a time-independent Hamiltonian, linear Heisenberg-picture dynamics, and Gaussian…
Tomography of an optomechanical oscillator via parametrically amplified position measurement
P. Warszawski, A. Szorkovszky, W. P. Bowen +1
We propose a protocol for quantum state tomography of nonclassical states in optomechanical systems. Using a parametric drive, the procedure overcomes the challenges of weak optome…
Performance of quantum error correction with coherent errors
Eric Huang, Andrew C. Doherty, Steven Flammia
We compare the performance of quantum error correcting codes when memory errors are unitary with the more familiar case of dephasing noise. For a wide range of codes we analyticall…
Optimizing practical entanglement distillation
Filip Rozpędek, Thomas Schiet, Le Phuc Thinh +3
The goal of entanglement distillation is to turn a large number of weakly entangled states into a smaller number of highly entangled ones. Practical entanglement distillation schem…
Coupling Two Spin Qubits with a High-Impedance Resonator
S. P. Harvey, C. G. L. Bøttcher, L. A. Orona +3
Fast, high-fidelity single and two-qubit gates are essential to building a viable quantum information processor, but achieving both in the same system has proved challenging for sp…
Tensor Networks with a Twist: Anyon-permuting domain walls and defects in PEPS
Jacob C. Bridgeman, Stephen D. Bartlett, Andrew C. Doherty
We study the realization of anyon-permuting symmetries of topological phases on the lattice using tensor networks. Working on the virtual level of a projected entangled pair state,…
Comparing Experiments to the Fault-Tolerance Threshold
Richard Kueng, David M. Long, Andrew C. Doherty +1
Achieving error rates that meet or exceed the fault-tolerance threshold is a central goal for quantum computing experiments, and measuring these error rates using randomized benchm…
Perturbative 2-body Parent Hamiltonians for Projected Entangled Pair States
Courtney G. Brell, Stephen D. Bartlett, Andrew C. Doherty
We construct parent Hamiltonians involving only local 2-body interactions for a broad class of Projected Entangled Pair States (PEPS). Making use of perturbation gadget techniques,…
Dynamical Steady-States in Driven Quantum Systems
T. M. Stace, A. C. Doherty, D. J. Reilly
We derive dynamical equations for a driven, dissipative quantum system in which the environment- induced relaxation rate is comparable to the Rabi frequency, avoiding assumptions o…
Tomography of a spin qubit in a double quantum dot
Maki Takahashi, Stephen D. Bartlett, Andrew C. Doherty
We investigate a range of methods to perform tomography in a solid-state qubit device, for which a priori initialization and measurement of the qubit is restricted to a single basi…
Minimum requirements for feedback enhanced force sensing
Glen I. Harris, David L. McAuslan, Thomas M. Stace +2
The problem of estimating an unknown force driving a linear oscillator is revisited. When using linear measurement, feedback is often cited as a mechanism to enhance bandwidth or s…
Topological Entanglement Entropy with a Twist
Benjamin J. Brown, Stephen D. Bartlett, Andrew C. Doherty +1
Defects in topologically ordered models have interesting properties that are reminiscent of the anyonic excitations of the models themselves. For example, dislocations in the toric…
Quantum Heating of a nonlinear resonator probed by a superconducting qubit
F. R. Ong, M. Boissonneault, F. Mallet +5
We measure the quantum fluctuations of a pumped nonlinear resonator, using a superconducting artificial atom as an in-situ probe. The qubit excitation spectrum gives access to the…
Symmetry protection of measurement-based quantum computation in ground states
Dominic V. Else, Stephen D. Bartlett, Andrew C. Doherty
The two-dimensional cluster state, a universal resource for measurement-based quantum computation, is also the gapped ground state of a short-ranged Hamiltonian. Here, we examine t…
Symmetry-protected phases for measurement-based quantum computation
Dominic V. Else, Ilai Schwarz, Stephen D. Bartlett +1
Ground states of spin lattices can serve as a resource for measurement-based quantum computation. Ideally, the ability to perform quantum gates via measurements on such states woul…
A time-dependent Tsirelson's bound from limits on the rate of information gain in quantum systems
Andrew C. Doherty, Stephanie Wehner
We consider the problem of distinguishing between a set of arbitrary quantum states in a setting in which the time available to perform the measurement is limited. We provide simpl…
Dynamical decoupling sequence construction as a filter-design problem
M. J. Biercuk, A. C. Doherty, H. Uys
Over the past decade we have seen an explosion of demonstrations of quantum coherence in atomic, optical, and condensed matter systems. These developments have placed a new emphasi…
Toric codes and quantum doubles from two-body Hamiltonians
Courtney G. Brell, Steven T. Flammia, Stephen D. Bartlett +1
We present a procedure to obtain the Hamiltonians of the toric code and Kitaev quantum double models as the low-energy limits of entirely two-body Hamiltonians. Our construction ma…
Continuous quantum non-demolition measurement of Fock states of a nanoresonator using feedback-controlled circuit QED
M. J. Woolley, A. C. Doherty, G. J. Milburn
We propose a scheme for the quantum non-demolition (QND) measurement of Fock states of a nanomechanical resonator via feedback control of a coupled circuit QED system. A Cooper pai…
Thresholds for topological codes in the presence of loss
Thomas M. Stace, Sean D. Barrett, Andrew C. Doherty
Many proposals for quantum information processing are subject to detectable loss errors. In this paper, we show that topological error correcting codes, which protect against compu…