39 research outputs found
Non-Supersymmetric, Multi-Center Solutions with Topological Flux
We find an infinite class of non-supersymmetric multi-center solutions to the
STU model in five-dimensional ungauged supergravity coupled to two vector
multiplets. The solutions are obtained by solving a system of linear equations
on a class of Ricci-scalar-flat K\"ahler manifolds studied by LeBrun. After
imposing an additional U(1) isometry in the base, we solve the axisymmetric
Toda equation and obtain explicit supergravity solutions
containing arbitrary numbers of 2-cycles with cohomological fluxes of all three
flavors. This improves upon a previous result where only two of the three
fluxes were topologically non-trivial. Imposing regularity and absence of
closed timelike curves, we obtain "bubble equations" highly reminiscent of
those known in the supersymmetric case. Thus we extend much of the analysis
done for BPS bubbling solutions to this new family of non-supersymmetric
bubbling solutions.Comment: 51 pages, 8 figures, substantial changes made to improve analysis of
orbifold groups in sections 4,
Doubly-Fluctuating BPS Solutions in Six Dimensions
We analyze the BPS solutions of minimal supergravity coupled to an
anti-self-dual tensor multiplet in six dimensions and find solutions that
fluctuate non-trivially as a function of two variables. We consider families of
solutions coming from KKM monopoles fibered over Gibbons-Hawking metrics or,
equivalently, non-trivial T^2 fibrations over an R3 base. We find smooth
microstate geometries that depend upon many functions of one variable, but each
such function depends upon a different direction inside the T^2 so that the
complete solution depends non-trivially upon the whole T^2 . We comment on the
implications of our results for the construction of a general superstratum.Comment: 24 page
Uplifting GPPZ: A Ten-dimensional Dual of
We find a new supersymmetric solution of type IIB supergravity which is the
uplift of the GPPZ solution of maximal SO gauged supergravity in five
dimensions. This background is expected to be holographically dual to an
supersymmetric mass deformation of four-dimensional
SYM. The ten-dimensional solution is singular in the region
corresponding to the IR regime of the dual gauge theory and we discuss the
physics of the singularity in some detail.Comment: 23 pages, no figures. v4: Minor corrections, published versio
Low-depth Circuit Implementation of Parity Constraints for Quantum Optimization
We present a construction for circuits with low gate count and depth,
implementing three- and four-body Pauli-Z product operators as they appear in
the form of plaquette-shaped constraints in QAOA when using the parity mapping.
The circuits can be implemented on any quantum device with nearest-neighbor
connectivity on a square-lattice, using only one gate type and one orientation
of two-qubit gates at a time. We find an upper bound for the circuit depth
which is independent of the system size. The procedure is readily adjustable to
hardware-specific restrictions, such as a minimum required spatial distance
between simultaneously executed gates, or gates only being simultaneously
executable within a subset of all the qubits, for example a single line.Comment: 9 pages, 6 figure
Constructive plaquette compilation for the parity architecture
Parity compilation is the challenge of laying out the required constraints
for the parity mapping in a local way. We present the first constructive
compilation algorithm for the parity architecture using plaquettes for
arbitrary higher-order optimization problems. This enables adiabatic protocols,
where the plaquette layout can natively be implemented, as well as fully
parallelized digital circuits. The algorithm builds a rectangular layout of
plaquettes, where in each layer of the rectangle at least one constraint is
added. The core idea is that each constraint, consisting of any qubits on the
boundary of the rectangle and some new qubits, can be decomposed into
plaquettes with a deterministic procedure using ancillas. We show how to pick a
valid set of constraints and how this decomposition works. We further give ways
to optimize the ancilla count and show how to implement optimization problems
with additional constraints.Comment: 8 pages, 5 figure