Thermalization as an invisibility cloak for fragile quantum superpositions
We propose a method for protecting fragile quantum superpositions in many-particle systems from dephasing by external classical noise. We call superpositions "fragile" if dephasing occurs particularly fast, because the noise couples very differently to the superposed states. The method con...
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| Main Authors: | , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
18 July 2017
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| In: |
Physical review
Year: 2017, Volume: 96, Issue: 1, Pages: 1-5 |
| ISSN: | 2469-9934 |
| DOI: | 10.1103/PhysRevA.96.012119 |
| Online Access: | Verlag, Volltext: http://dx.doi.org/10.1103/PhysRevA.96.012119 Verlag, Volltext: http://arxiv.org/abs/1705.06467 
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| Author Notes: | Walter Hahn and Boris V. Fine |
| Summary: | We propose a method for protecting fragile quantum superpositions in many-particle systems from dephasing by external classical noise. We call superpositions "fragile" if dephasing occurs particularly fast, because the noise couples very differently to the superposed states. The method consists of letting a quantum superposition evolve under the internal thermalization dynamics of the system, followed by a time reversal manipulation known as Loschmidt echo. The thermalization dynamics makes the superposed states almost indistinguishable during most of the above procedure. We validate the method by applying it to a cluster of spins-1/2. |
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| Item Description: | Gesehen am 16.05.2018 |
| Physical Description: | Online Resource |
| ISSN: | 2469-9934 |
| DOI: | 10.1103/PhysRevA.96.012119 |