Mainz 2026 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 58: Quantum Technologies – Color Centers I
Q 58.1: Talk
Thursday, March 5, 2026, 14:30–14:45, P 5
Critical Discrete Time Crystal with 3D-dipolar-coupled Nuclear Spins in Diamond — •Christina Ioannou1, Kai-Niklas Schymik1, Dan Yudilevich1, Madhumati Seetharaman1, Benjamin Pingault2, Francisco Machado1, and Tim Taminiau1 — 1TU Delft, Delft, Netherlands — 2Argonne National Laboratory/ University of Chicago, Chicago, USA
We investigate the thermalization dynamics under Floquet driving of a 3D-dipolar-coupled many- body system of 13C nuclear spins in diamond. Microscopic control and readout of 40 individual spins gives in depth insight into many-body dynamics and allows for the observation of novel non-equilibrium phenomena. In the case of a disordered Ising type Hamiltonian, with a local disorder term, long range interactions between spins cause the slow down of thermalization dynamics leading to a long lived critical discrete time crystal (DTC) order. We demonstrate the stability of the DTC order, attributed to critical dynamics and we analyze the underlying thermalization mechanism caused by two spin correlated decays.
Keywords: Quantum simulations; Many-body; NV centre; Nuclear spins; Time crystal