TY - JOUR
T1 - Engineering of optical continuous-variable qubits via displaced photon subtraction
T2 - Multimode analysis
AU - Takeoka, M.
AU - Neergaard-Nielsen, J. S.
AU - Takeuchi, M.
AU - Wakui, K.
AU - Takahashi, H.
AU - Hayasaka, K.
AU - Sasaki, M.
N1 - Funding Information:
MT was supported by a MEXT Grant-in-Aid for Young Scientists (B) 22740270.
PY - 2011/1/10
Y1 - 2011/1/10
N2 - We investigate the practical scheme of engineering a qubit of two optical continuous-variable states, based on squeezed vacuum and coherently displaced photon subtraction. A fully multimode model is developed to describe a continuous wave (cw) setting of the experiment, which has been successfully implemented to generate highly pure non-classical states. The model agrees well with the experimental results and the numerical results show that the intrinsic imperfection due to the cw nature of the source is relatively small. Our photon subtraction technique could also be useful for preparing optical Schrodinger's cat-like states in arbitrary superposition, which is a basic qubit resource for linear optics coherent state quantum computing.
AB - We investigate the practical scheme of engineering a qubit of two optical continuous-variable states, based on squeezed vacuum and coherently displaced photon subtraction. A fully multimode model is developed to describe a continuous wave (cw) setting of the experiment, which has been successfully implemented to generate highly pure non-classical states. The model agrees well with the experimental results and the numerical results show that the intrinsic imperfection due to the cw nature of the source is relatively small. Our photon subtraction technique could also be useful for preparing optical Schrodinger's cat-like states in arbitrary superposition, which is a basic qubit resource for linear optics coherent state quantum computing.
KW - coherent state quantum computing
KW - continuous-variable qubit
KW - photon subtraction
KW - squeezed state
UR - http://www.scopus.com/inward/record.url?scp=79952667071&partnerID=8YFLogxK
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U2 - 10.1080/09500340.2010.533205
DO - 10.1080/09500340.2010.533205
M3 - Article
AN - SCOPUS:79952667071
SN - 0950-0340
VL - 58
SP - 266
EP - 275
JO - Optica Acta
JF - Optica Acta
IS - 3-4
ER -