Entanglement generation from thermal spin states via unitary beam splitters

Journal Article · Wed Dec 01 00:00:00 EST 2004 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.70.062312· OSTI ID:20649914

Markham, D ^[1]; Murao, M ^[2]; Vedral, V ^[1]

---

1. Optics Section, Blackett Laboratory, Imperial College, London SW7 2BW (United Kingdom)
2. Department of Physics, Graduate School of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033 (Japan)

We suggest a method of generating distillable entanglement from mixed states unitarily, by utilizing the flexibility of dimension of occupied Hilbert space. We present a model of a thermal spin state entering a beam splitter generating entanglement. It is the truncation of the state that allows for entanglement generation. The output entanglement is investigated for different temperatures and it is found that more randomness - in the form of higher temperature - is better for this setup.

• OSTI ID: 20649914
• Journal Information: Physical Review. A, Vol. 70, Issue 6; Other Information: DOI: 10.1103/PhysRevA.70.062312; (c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
BEAM SPLITTING
CORRELATIONS
FLEXIBILITY
HILBERT SPACE
MIXED STATE
OPTICS
QUANTUM MECHANICS
QUANTUM NUMBERS
RANDOMNESS
SPIN