Related Experiment Video
Updated: Jun 7, 2025
09:01
High-resolution Thermal Micro-imaging Using Europium Chelate Luminescent Coatings
Published on: April 16, 2017
7.7K
Quantum Coherence Control at Temperatures up to 1400 K
Jing-Wei Fan1,2, Shuai-Wei Guo1,3, Chao Lin1
1Department of Physics, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China.
Nano Letters
|November 12, 2024
Summary
Scientists achieved coherent quantum control of spins in diamond at temperatures up to 1400 K. This breakthrough, using reduced graphene oxide for rapid heating and cooling, enables new high-temperature quantum technologies and studies.
Area of Science:
- Quantum physics
- Materials science
- Nanotechnology
Background:
- Coherent quantum control is crucial for quantum technologies but is limited by high temperatures.
- Previous demonstrations of quantum control in diamond spins operated below 1000 K.
- Increasing operating temperatures is challenging due to spin relaxation rates exceeding heating/cooling speeds.
Purpose of the Study:
- To enhance heating and cooling rates for high-temperature quantum control.
- To achieve coherent quantum operations at temperatures exceeding 1000 K.
- To enable diamond-based quantum sensors for high-temperature magnetic phenomena.
Main Methods:
- Utilized reduced graphene oxide as a laser absorber and heat drain.
- Implemented rapid heating and cooling cycles for spin control.
- Demonstrated spin polarization and readout at elevated temperatures.
Main Results:
- Achieved coherent quantum control of diamond spins at up to 1400 K.
- Exceeded the Curie temperatures of all known materials.
- Significantly improved heating and cooling rates compared to previous methods.
Conclusions:
- Coherent quantum operations are feasible at unprecedented high temperatures.
- Reduced graphene oxide effectively enhances thermal management for quantum control.
- This advancement opens possibilities for studying high-temperature magnetism with diamond sensors.
Related Concept Videos
01:27Atomic Spectroscopy: Effects of Temperature
305
Atomization, converting samples into gas-phase atoms and ions, is essential for atomic spectroscopy. The flame temperature required for atomization affects the efficiency of the atomic spectroscopic methods by increasing the atomization efficiency and the relative population of the excited and ground states.
At thermal equilibrium, the relative populations of excited and ground state atoms can be estimated using the Maxwell–Boltzmann distribution. For example, an increase in temperature...
At thermal equilibrium, the relative populations of excited and ground state atoms can be estimated using the Maxwell–Boltzmann distribution. For example, an increase in temperature...
305
01:11Temperature and Thermal Equilibrium
6.6K
Heat and temperature are essential concepts for everyone every day. The study of heat and temperature is part of an area of physics known as thermodynamics. It is not always easy to distinguish heat and temperature.
The concept of temperature has evolved from the common concepts of hot and cold. The scientific definition of temperature explains more than just our sense of hot and cold. Temperature is operationally defined as the quantity measured with a thermometer. Furthermore, temperature is...
The concept of temperature has evolved from the common concepts of hot and cold. The scientific definition of temperature explains more than just our sense of hot and cold. Temperature is operationally defined as the quantity measured with a thermometer. Furthermore, temperature is...
6.6K
02:41Constant Volume Calorimetry
26.9K
Calorimeters are useful to determine the heat released or absorbed by a chemical reaction. Coffee cup calorimeters are designed to operate at constant (atmospheric) pressure and are convenient to measure heat flow (or enthalpy change) accompanying processes that occur in solution at constant pressure. A different type of calorimeter that operates at constant volume, colloquially known as a bomb calorimeter, is used to measure the energy produced by reactions that yield large amounts of heat and...
26.9K
02:39Phase Transitions: Melting and Freezing
12.3K
Heating a crystalline solid increases the average energy of its atoms, molecules, or ions, and the solid gets hotter. At some point, the added energy becomes large enough to partially overcome the forces holding the molecules or ions of the solid in their fixed positions, and the solid begins the process of transitioning to the liquid state or melting. At this point, the temperature of the solid stops rising, despite the continual input of heat, and it remains constant until all of the solid is...
12.3K
01:23Physical Methods for Controlling Microbial Growth: Temperature
1
Heat is a widely used method to control microbial growth by targeting and denaturing cellular proteins, thereby killing or inactivating microbes. This method's effectiveness is quantified using parameters such as the thermal death point (TDP), thermal death time (TDT), and decimal reduction time (D value). TDP represents the lowest temperature at which all microorganisms in a liquid suspension are eliminated within 10 minutes, whereas TDT is the time necessary to achieve sterilization at a...
1
03:02Constant Pressure Calorimetry
84.7K
Calorimetry is a technique used to measure the amount of heat involved in a chemical or physical process or to measure the heat transferred to or from a substance. The heat is exchanged with a calibrated and insulated device called the calorimeter. Calorimetry experiments are based on the assumption that there is no heat exchange between the insulated calorimeter and the external environment. The well-insulated calorimeters prevent the transfer of heat between the calorimeter and its external...
84.7K