Enhancement of entanglement by means of squeezing in continuous-variable systems
In this project, we investigate the enhancement of entanglement by means of local squeezing of the coherent initial state in various two-mode coupled harmonic oscillator systems within the pure Gaussian regime. Remarkably, we discover that the enhancement of maximum entanglement produced in the t...
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| Format: | Final Year Project |
| Language: | English |
| Published: |
2010
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| Subjects: | |
| Online Access: | http://hdl.handle.net/10356/40829 |
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| Institution: | Nanyang Technological University |
| Language: | English |
| Summary: | In this project, we investigate the enhancement of entanglement by means of local squeezing
of the coherent initial state in various two-mode coupled harmonic oscillator systems within
the pure Gaussian regime. Remarkably, we discover that the enhancement of maximum
entanglement produced in the time evolution occurs under two different conditions: the
existence or non-existence of an entanglement enhancement threshold. By developing a
mathematical framework, we are able to: (i) develop a phase-space picture that allows us
to explain the entanglement enhancement due to squeezing; (ii) explain the origin of the
threshold. In particular, it has enabled us to determine the analytical expression of the
threshold. |
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