Corpus ID: 236428696

Ancilla assisted Discrete Time Crystals in Non-interacting Spin Systems

@inproceedings{Geng2021AncillaAD,
  title={Ancilla assisted Discrete Time Crystals in Non-interacting Spin Systems},
  author={Jianpei Geng and Vadim Vorobyov and Durga Bhaktavatsala Rao Dasari and Joerg Wrachtrup},
  year={2021}
}
We show here through experiments and exact analytical models the emergence of discrete time translation symmetry breaking in non-interacting systems. These time-periodic structures become stable against perturbations only in the presence of their interaction with their ancillary quantum system and display subharmonic response over a range of rotation angle errors. We demonstrate this effect for central spin and spin-mechanical systems, where the ancillary induced interaction among the spins… Expand

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References

SHOWING 1-10 OF 37 REFERENCES
Discrete Time Crystals
Experimental advances have allowed for the exploration of nearly isolated quantum many-body systems whose coupling to an external bath is very weak. A particularly interesting class of such systemsExpand
Signatures of discrete time crystalline order in dissipative spin ensembles
Discrete time-translational symmetry in a periodically driven many-body system can be spontaneously broken to form a discrete time crystal, an exotic new phase of matter. We present observationsExpand
Discrete Time-Crystalline Order in Cavity and Circuit QED Systems.
TLDR
A phenomenology of dissipative discrete time crystals is established by generalizing the Landau theory of phase transitions to Floquet open systems and finding clear signatures of a transient discrete time-crystalline behavior, which is absent in the isolated counterpart. Expand
Observation of discrete time-crystalline order in a disordered dipolar many-body system
TLDR
This work observes long-lived temporal correlations, experimentally identifies the phase boundary and finds that the temporal order is protected by strong interactions, which opens the door to exploring dynamical phases of matter and controlling interacting, disordered many-body systems. Expand
Observation of a Space-Time Crystal in a Superfluid Quantum Gas.
TLDR
The observation of a space-time crystal using ultracold atoms, where the periodic structure in both space and time is directly visible in the experimental images, paving the way for the usage of space- time crystals for the discovery of novel nonequilibrium phases of matter. Expand
Phase Structure of Driven Quantum Systems.
TLDR
It is shown that their disordered Floquet many-body localized counterparts can exhibit distinct ordered phases delineated by sharp transitions, and these are analogs of equilibrium states with broken symmetries and topological order. Expand
Discrete Time Crystals: Rigidity, Criticality, and Realizations.
TLDR
A simple model for a one-dimensional discrete time crystal which explicitly reveals the rigidity of the emergent oscillations as the drive is varied is considered and a blueprint based upon a one dimensional chain of trapped ions is proposed. Expand
Simulating a discrete time crystal over 57 qubits on a quantum computer
We simulate the dynamics of a spin-1/2 chain with nearest neighbor Ising interactions, quenched disorder and periodic driving over 57 qubits on a current quantum computer. A transition between timeExpand
Observation of a discrete time crystal
TLDR
The experimental observation of a discrete time crystal, in an interacting spin chain of trapped atomic ions, is presented, which opens the door to the study of systems with long-range spatio-temporal correlations and novel phases of matter that emerge under intrinsically non-equilibrium conditions. Expand
Observation of Discrete-Time-Crystal Signatures in an Ordered Dipolar Many-Body System.
TLDR
Nuclear magnetic resonance observations of DTC signatures in a third, strikingly different system: an ordered spatial crystal are shown and it is shown that interactions during the pulse of the DTC sequence contribute to the decay of the signal, complicating attempts to measure the intrinsic lifetime ofThe DTC. Expand
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