Related Experiment Video
Updated: Mar 29, 2026
11:21
Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
Published on: March 30, 2017
8.0K
Phonon Cooling by an Optomechanical Heat Pump.
Ying Dong1,2, F Bariani2, P Meystre2
1Department of Physics, Hangzhou Normal University, Hangzhou, Zhejiang 310036, China.
Physical Review Letters
|December 10, 2015
Summary
Researchers developed a novel cavity optomechanical heat pump using a polariton fluid. This system effectively cools mechanical modes to the quantum regime from room temperature, regardless of frequency.
Area of Science:
- Quantum physics
- Optomechanics
- Condensed matter physics
Background:
- Cavity optomechanics enables the study of quantum phenomena in mechanical resonators.
- Cooling mechanical modes to the quantum regime is crucial for quantum technologies.
- Existing methods often face limitations in cooling arbitrary frequencies.
Purpose of the Study:
- To propose and theoretically analyze a novel cavity optomechanical heat pump.
- To demonstrate cooling of mechanical modes to the quantum regime.
- To overcome frequency limitations in current cooling techniques.
Main Methods:
- Theoretical analysis of a cavity optomechanical system.
- Utilizing a polariton fluid for cooling.
- Employing external modulation of the mechanical resonator's substrate.
- Coupling to a precooled phonon mode.
Main Results:
- Demonstrated a functional analog of a heat pump in a cavity optomechanical setup.
- Achieved cooling of mechanical modes deep into the quantum regime.
- Showcased cooling of phonon modes across arbitrary frequencies, overcoming detuning limitations.
Conclusions:
- The proposed polariton-fluid-based optomechanical heat pump offers a versatile method for quantum-level cooling.
- This approach significantly advances the capability to prepare mechanical resonators in their quantum ground state.
- The technique is not constrained by cavity-optical field detuning, broadening its applicability.
Related Concept Videos
01:07Refrigerators and Heat Pumps
3.2K
Refrigerators or heat pumps are heat engines operating in a reverse direction. For a refrigerator, the focus is on removing heat from a specific area, whereas, for a heat pump, the focus is on dumping heat into one particular area. A refrigerator (or heat pump) absorbs heat Qc from the cold reservoir at Kelvin temperature Tc and discards heat Qh to the hot reservoir at Kelvin temperature Th, while work W is done on the engine’s working substance.
A household refrigerator removes heat from...
A household refrigerator removes heat from...
3.2K
01:19Mechanism of heat transfer
2.2K
Understanding heat transfer mechanisms is essential for understanding how our bodies maintain balance in different environmental conditions. When the environment is thermoneutral, the body is in a state of balance, neither using nor releasing energy to maintain its core temperature. However, when the environment is not thermoneutral, the body employs four heat transfer mechanisms to maintain homeostasis: conduction, convection, evaporation, and radiation. These mechanisms facilitate heat...
2.2K
01:20Mechanisms of Heat Transfer II
5.2K
In convection, thermal energy is carried by the large-scale flow of matter. Ocean currents and large-scale atmospheric circulation, which result from the buoyancy of warm air and water, transfer hot air from the tropics toward the poles and cold air from the poles toward the tropics. The Earth’s rotation interacts with those flows, causing the observed eastward flow of air in the temperate zones. Convection dominates heat transfer by air, and the amount of available space for the airflow...
5.2K
01:14Mechanisms of Heat Transfer
2.0K
Heat transfer between the human body and its environment occurs through four main mechanisms: conduction, convection, radiation, and evaporation.
Conduction, accounting for approximately 3% of body heat loss at rest, is the process of exchanging heat between molecules of two materials in direct contact. This can result in both heat loss and gain. For instance, when the body is submerged in water, which conducts heat 20 times more effectively than air, it can either lose or gain significant...
Conduction, accounting for approximately 3% of body heat loss at rest, is the process of exchanging heat between molecules of two materials in direct contact. This can result in both heat loss and gain. For instance, when the body is submerged in water, which conducts heat 20 times more effectively than air, it can either lose or gain significant...
2.0K
01:14Mechanisms of Heat Transfer I
7.3K
Just as interesting as the effects of heat transfer on a system are the methods by which the heat transfer occur. Whenever there is a temperature difference, heat transfer occurs. It may occur rapidly, such as through a cooking pan, or slowly, such as through the walls of a picnic ice box. So many processes involve heat transfer that it is hard to imagine a situation where no heat transfer occurs. Yet, every heat transfer takes place by only three methods: conduction, convection, and radiation.
7.3K
01:21Joule-Thomson Effect
11.2K
The Joule-Thomson effect, also known as the Joule-Kelvin effect, describes the temperature change of a fluid when it is forced through a valve or porous plug while keeping it in a thermally insulated environment. This experiment is called a throttling process. This is an important effect widely used in refrigeration and the liquefaction of gases.
This experiment forces high-pressure gas through a throttle valve or a porous plug to a lower-pressure region. The gas expands as it passes through to...
This experiment forces high-pressure gas through a throttle valve or a porous plug to a lower-pressure region. The gas expands as it passes through to...
11.2K