Details
| Original language | English |
|---|---|
| Article number | 013002 |
| Journal | Physical Review Letters |
| Volume | 116 |
| Issue number | 1 |
| Publication status | Published - 8 Jan 2016 |
Abstract
Optical clocks based on ensembles of trapped ions promise record frequency accuracy with good short-term stability. Most suitable ion species lack closed transitions, so the clock signal must be read out indirectly by transferring the quantum state of the clock ions to cotrapped logic ions of a different species. Existing methods of quantum logic readout require a linear overhead in either time or the number of logic ions. Here we describe a quantum algorithmic readout whose overhead scales logarithmically with the number of clock ions in both of these respects. The scheme allows a quantum nondemolition readout of the number of excited clock ions using a single multispecies gate operation which can also be used in other areas of ion trap technology such as quantum information processing, quantum simulations, metrology, and precision spectroscopy.
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In: Physical Review Letters, Vol. 116, No. 1, 013002, 08.01.2016.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Quantum Algorithmic Readout in Multi-Ion Clocks
AU - Schulte, Marius
AU - Lörch, Niels
AU - Leroux, Ian D.
AU - Schmidt, Piet Oliver
AU - Hammerer, Klemens Johannes
PY - 2016/1/8
Y1 - 2016/1/8
N2 - Optical clocks based on ensembles of trapped ions promise record frequency accuracy with good short-term stability. Most suitable ion species lack closed transitions, so the clock signal must be read out indirectly by transferring the quantum state of the clock ions to cotrapped logic ions of a different species. Existing methods of quantum logic readout require a linear overhead in either time or the number of logic ions. Here we describe a quantum algorithmic readout whose overhead scales logarithmically with the number of clock ions in both of these respects. The scheme allows a quantum nondemolition readout of the number of excited clock ions using a single multispecies gate operation which can also be used in other areas of ion trap technology such as quantum information processing, quantum simulations, metrology, and precision spectroscopy.
AB - Optical clocks based on ensembles of trapped ions promise record frequency accuracy with good short-term stability. Most suitable ion species lack closed transitions, so the clock signal must be read out indirectly by transferring the quantum state of the clock ions to cotrapped logic ions of a different species. Existing methods of quantum logic readout require a linear overhead in either time or the number of logic ions. Here we describe a quantum algorithmic readout whose overhead scales logarithmically with the number of clock ions in both of these respects. The scheme allows a quantum nondemolition readout of the number of excited clock ions using a single multispecies gate operation which can also be used in other areas of ion trap technology such as quantum information processing, quantum simulations, metrology, and precision spectroscopy.
UR - http://www.scopus.com/inward/record.url?scp=84954546902&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.116.013002
DO - 10.1103/PhysRevLett.116.013002
M3 - Article
AN - SCOPUS:84954546902
VL - 116
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 1
M1 - 013002
ER -