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Time Reversal

All articles tagged with #time reversal

Quantum Time Reversal Realized: Measuring to Reverse Time's Arrow and Harvest Energy
science7 days ago

Quantum Time Reversal Realized: Measuring to Reverse Time's Arrow and Harvest Energy

Researchers have developed quantum-control protocols that, by integrating quantum measurements with feedback, can suppress or reverse the arrow of time in quantum systems. By designing a control Hamiltonian that mirrors measurement effects, they create time-reversed or distorted trajectories and even a measurement-based engine that extracts energy from the act of observation. The work—published in Physical Review X—aims to improve quantum state control and could enable new methods for powering quantum computers and batteries, with planned experimental tests using superconducting qubits.

via ScienceDaily|
#maxwells-demon#measurement#quantum
Quantum Control Reverses the Arrow of Time in the Lab
science18 days ago

Quantum Control Reverses the Arrow of Time in the Lab

Researchers developed measurement-based quantum control that, by combining measurements, feedback, and tailored control fields, can stretch or reverse the apparent arrow of time in quantum systems, creating time-reversed trajectories and a measurement-powered engine that can extract energy from monitoring; the work, published in Physical Review X, points to new methods for quantum state preparation and energy management with platforms like superconducting qubits.

via SciTechDaily|
#measurement#quantum#quantum-control
Quantum time reversal: theorists outline a Hamiltonian approach to rewinding quantum events
science2 months ago

Quantum time reversal: theorists outline a Hamiltonian approach to rewinding quantum events

The study shows, in theory, how a quantum system's arrow of time could be reversed by a designed sequence of fields and pulses (a Hamiltonian) that brings the system back to its initial state after measurement, potentially reducing information loss in quantum computers and even reversing decoherence, but practical implementation requires near-perfect measurements, a current major obstacle.

via Yahoo|
#decoherence#hamiltonian#quantum
Scientists Achieve Quantum Breakthrough to Reverse Time
science11 months ago

Scientists Achieve Quantum Breakthrough to Reverse Time

Researchers from Austria have developed a quantum protocol that allows them to rewind and manipulate the 'age' of particles at the quantum level, effectively controlling time within quantum systems. Using a device called a quantum switch, they demonstrated the ability to reverse the state of photons without prior knowledge of their history, which could enhance quantum computing and deepen our understanding of time and gravity. While not enabling actual time travel, this breakthrough offers promising technological applications in quantum information processing.

via The Brighter Side of News|
#quantum-computing#quantum-entanglement#quantum-physics
"Unlocking Time Reversibility: Glass's Potential for Time Travel Revealed"
science-and-technology2 years ago

"Unlocking Time Reversibility: Glass's Potential for Time Travel Revealed"

Scientists have discovered evidence of a material-based measure of the ability to reverse time, challenging the linear nature of time in certain materials like glass. This breakthrough in measuring time, known as material time, has been achieved through the study of glass's molecular reconfiguration, providing insight into its ability to reverse time on a molecular level. This finding could have significant implications for understanding the aging process of materials and the laws of physics.

via Giant Freakin Robot|
#entropy#glass#material-time
"Scientists Develop Time-Reversing 'Mirror' for Electromagnetic Waves"
science-and-technology3 years ago

"Scientists Develop Time-Reversing 'Mirror' for Electromagnetic Waves"

Scientists at the City University of New York have created a "mirror" that can reflect an electromagnetic wave backward in time, paving the way for ultra-fast communication and computing applications using light. The mirror temporally reverses waves, reflecting them stretched out and reversed. The team's next endeavor will be to experiment in the hundreds of GHz, but they will still be far from the 400THz frequencies of visible light.

via TechSpot|
#electromagnetic-waves#metamaterial#mirror