.png){kind=icon}
.png){kind=icon}
Return
A robust large-period discrete time crystal and its signature in a digital quantum computer
.png){kind=icon}
PRE
AI
T
R
C
B
R
DOI：10.1088/2058-9565/ae3851.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
Discrete time crystals (DTCs) are out-of-equilibrium quantum states of matter which break time translational symmetry. DTCs have been extensively realized in experiments, particularly their subclass that is characterized by period-doubling dynamics due to its natural occurrence in a system of periodically driven two-level, e.g. spin-1/2, particles. The realization of DTCs beyond period-doubling, including their generalizations termed discrete quasicrystals has also been made in recent years, though such experiments typically involve higher spin particles. Constructing and observing DTCs beyond period-doubling in systems of two-level particles are generally still considered an open challenge due to the latter's Z2 symmetry that natively only leads to period-doubling. In this work, we developed an intuitive interacting system of two-level particles (qubits) that supports the more non-trivial period-quadrupling DTCs (4T-DTCs). Remarkably, by utilizing a variational algorithm, we are able to observe clear signatures of such 4T-DTCs in a quantum processor despite the presence of considerable noise and the small number of available qubits. Our findings extend the landscape of time crystalline behavior by demonstrating a distinct realization of time crystallinity beyond standard period-doubling dynamics with qubits (two-level particles) on a NISQ-era digital quantum computer, as well as the potential of existing noisy intermediate-scale quantum devices for simulating exotic non-equilibrium quantum states of matter.
Keywords:
4T-discrete time crystals (DTCs)
non-equilibrium quantum many-body physics
NISQ-era quantum simulations
quantum computing
Journal
IF:
5
Papers:
1.4K
Citations:
5.1K
Organization
Cited Papers