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  2. In 1994, the National Institute of Standards and Technology (NIST) achieved a record cold temperature of 700 nK (nanokelvin, or 10 -9 K). In September 2003, researchers at the Massachusetts Institute of Technology announced a record cold temperature of 450 picokelvin (pK), or 4.5 × 10 -10 K, in a Bose-Einstein condensate of sodium atoms.
    www.newworldencyclopedia.org/entry/Absolute_zero
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    How cold is 450 picokelvin in a Bose-Einstein condensate?In September 2003, researchers at the Massachusetts Institute of Technology announced a record cold temperature of 450 picokelvin (pK), or 4.5 × 10 -10 K, in a Bose-Einstein condensate of sodium atoms. This was performed by Wolfgang Ketterle and colleagues at MIT.
    How can atoms reach picokelvin temperatures after evaporative cooling?There are two ways to realize fast cooling after evaporative cooling that could enable atoms to reach picokelvin temperatures: controllable decompression cooling and DKC. The principle of controllable decompression cooling is that the atoms lose energy during adiabatic expansion when the system is decompressed.
    How did Ketterle achieve a temperature of 500 PK?In 2002, Ketterle's team conducted their first experiment, reducing the temperature of a confined atomic Na gas to below 500 pK. The key step to achieving a temperature of 500 pK is that they implemented two stages of decompression cooling after the a evaporative cooling phase (figure 2).
    Can thermal fluctuation be reduced to picokelvin region?If the actual temperature of the system can be reduced to the picokelvin region, the thermal fluctuation will not affect the interaction between the quantum tunnel and the field, which will greatly improve the experimental results. Zoom In Zoom Out Reset image size
     
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    Absolute zero - Wikipedia

    A record cold temperature of 450 ± 80 picokelvin (pK) (4.5 × 10 −10 K) in a BEC of sodium atoms was achieved in 2003 by researchers at the Massachusetts Institute of Technology (MIT). The associated black-body (peak emittance) wavelength of 6,400 kilometers is roughly the radius of Earth. See more

    Absolute zero is the lowest limit of the thermodynamic temperature scale; a state at which the enthalpy and entropy of a cooled ideal gas reach their minimum value, taken as zero See more

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    A Bose–Einstein condensate (BEC) is a state of matter of a dilute gas of weakly interacting bosons confined in an external potential and cooled … See more

    Temperatures that are expressed as negative numbers on the familiar Celsius or Fahrenheit scales are simply colder than the zero points of those scales. Certain See more

    The average temperature of the universe today is approximately 2.73 kelvins (−454.76 °F), or about −270.42 °C, based on measurements of See more

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    At temperatures near 0 K (−273.15 °C; −459.67 °F), nearly all molecular motion ceases and ΔS = 0 for any adiabatic process, … See more

    Absolute, or thermodynamic, temperature is conventionally measured in kelvin (Celsius-scaled increments) and in the Rankine scale See more

    One of the first to discuss the possibility of an absolute minimal temperature was Robert Boyle. His 1665 New Experiments and Observations … See more

     
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    WebSep 11, 2003 · The new record set by the MIT group is 500 picokelvin, or six times lower. At such low temperatures, atoms cannot be kept in physical containers, because they would stick to the walls. Furthermore, no …

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    WebDec 23, 2011 · Unfortunately, to truly create an ideal quantum system, physicists have to reach temperatures extremely close to absolute zero, in the picokelvin (pK, 10 -12 K) range. The current record for...

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    WebIn September 2003, researchers at the Massachusetts Institute of Technology announced a record cold temperature of 450 picokelvin (pK), or 4.5 × 10-10 K, in a Bose-Einstein condensate of sodium atoms. This …

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