REVIEW 4 cited by
Measuring out-of-time-order correlations and multiple quantum spectra in a trapped ion quantum magnet
Not yet reviewed by Pith; the record is open.
This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.
SPECIMEN: schema-true, not a live event
T0 review · schema-true
One-sentence machine reading of the paper's core claim.
pith:XXXXXXXX · record.json · timestamp
Signed reviews
read the original abstract
Controllable arrays of ions and ultra-cold atoms can simulate complex many-body phenomena and may provide insights into unsolved problems in modern science. To this end, experimentally feasible protocols for quantifying the buildup of quantum correlations and coherence are needed, as performing full state tomography does not scale favorably with the number of particles. Here we develop and experimentally demonstrate such a protocol, which uses time reversal of the many-body dynamics to measure out-of-time-order correlation functions (OTOCs) in a long-range Ising spin quantum simulator with more than 100 ions in a Penning trap. By measuring a family of OTOCs as a function of a tunable parameter we obtain fine-grained information about the state of the system encoded in the multiple quantum coherence spectrum, extract the quantum state purity, and demonstrate the buildup of up to 8-body correlations. Future applications of this protocol could enable studies of many-body localization, quantum phase transitions, and tests of the holographic duality between quantum and gravitational systems.
Forward citations
Cited by 4 Pith papers
-
Strong unitary designs in optimal depth and space
For every fixed k and error tolerance, strong approximate unitary k-designs are constructed in optimal Theta(log n) depth on the n system qubits using random perfect-matching layers.
-
Optimizing Doppler laser cooling protocols for quantum sensing with 3D ion crystals in a Penning trap
A scalable numerical framework simulates laser cooling of large 3D ion crystals in Penning traps, identifying axial mode additions and prolate geometries that achieve sub-1 mK perpendicular temperatures with simplifie...
-
Refining the Understanding of Operator Size Dynamics in Open Quantum Systems
In Brownian SYK models, operator size under the bath-traced Lindblad definition shows a scrambling signature only for intra-system interactions, with the same early-time critical point as the full-contour definition, ...
-
Post-Selection Probability and Fidelity of Bidirectional Teleportation
Post-selection probability and fidelity of bidirectional teleportation are expressed via the Loschmidt echo, revealing initial-state dependence of fidelity and stability of probability in integrable models.
Discussion (0). Continue with ORCID to comment.