Phase of matter where order, disorder coexist in time found, PgII.

Key Highlights:

• Scientists have discovered a new phase of matter called a time rondeau crystal (TRC), exhibiting order in time.
• Unlike regular matter with ordered or disordered atoms, TRCs display a mix of order and randomness in their temporal structure.
• Researchers created a TRC using the spins of carbon-13 nuclei in diamond, controlled with microwave pulses.
• The TRC's order was metastable, lasting several seconds before fading as the system heated up.

Detailed Insights:

• Time crystals, predicted in 2012, display repeating patterns in time by oscillating at different rhythms when energy is applied periodically.
• In a TRC, the system maintains a repeating pattern over long periods, but exhibits disordered or irregular motion between these repeating moments.
• The randomness in the microwave pulses used to control the nuclei's spins had structure, causing spins to be partly unpredictable short-term but predictable long-term.
• This discovery expands the understanding of 'order' in physics, demonstrating that complex forms of time-wise organization are possible even with irregular external drives.
• Potential applications of TRCs include encoding information in their beats and creating new kinds of quantum sensors.

Scientific/Technical Concepts Involved:

• Phase of Matter: A distinct form of matter characterized by unique physical properties and molecular arrangement.
• Time Crystal: A state of matter that exhibits repeating patterns in time, breaking time-translation symmetry.
• Metastable: A state of a system that is stable for a period of time, but not the most stable state overall.
• Nuclear Spin: An intrinsic property of atomic nuclei that gives rise to magnetic moments.