aqora

Multi-photon processes: Dramatic possibilities beyond the classical approach

S. L. Chin

Optics and Photonics NewsMay 1, 19930 citations

Star states in multi-photon processes

Z. Kis, József Janszky, Петер Адам

It is shown that the classical and quantum mechanical description of first and second order nonlinear optical processes (including squeezing) are equivalent in the sense that in both cases an initial phase space distribution transforms in the same manner. We investigate in detail the degenerate three wave mixing, which is a third order process, and point out that the classical and quantum descriptions give essentially different results. This process yields three-pointed star states. It is pointed out that the efficiency of the star state in a three photon process is superior to that of a coherent state with two orders of magnitude.It is shown that the classical and quantum mechanical description of first and second order nonlinear optical processes (including squeezing) are equivalent in the sense that in both cases an initial phase space distribution transforms in the same manner. We investigate in detail the degenerate three wave mixing, which is a third order process, and point out that the classical and quantum descriptions give essentially different results. This process yields three-pointed star states. It is pointed out that the efficiency of the star state in a three photon process is superior to that of a coherent state with two orders of magnitude.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIEAug 19, 19980 citations

Multi-photon processes

Paul Hockett

Morgan & Claypool Publishers eBooksApr 1, 20182 citations

Star States

József Janszky, Z. Kis, Петер Адам

It is shown that the classical and quantum mechanical description of first and second order nonlinear optical processes (including squeezing) are equivalent to the effect that in both cases an initial phase space distribution is transformed in the same manner. Three-photon states – star states – are generated in third order nonlinear processes, where the classical and quantum descriptions give essentially different results. It is pointed out that the efficiency of the star state in a three photon process is superior to that of a coherent state with two order of magnitude.It is shown that the classical and quantum mechanical description of first and second order nonlinear optical processes (including squeezing) are equivalent to the effect that in both cases an initial phase space distribution is transformed in the same manner. Three-photon states – star states – are generated in third order nonlinear processes, where the classical and quantum descriptions give essentially different results. It is pointed out that the efficiency of the star state in a three photon process is superior to that of a coherent state with two order of magnitude.

Fortschritte der PhysikNov 1, 19981 citation

MULTIPLE PHOTON PROCESSES

Dietrich Marcuse

Elsevier eBooksJan 1, 19800 citations

Deterministic Entanglement as a Prerequisite for Scalable Quantum Photonic Resource State Generation

Yorick Reum, Matteo Santandrea, Rohit Prasad +6 more

ABSTRACT As demonstrated experimentally by Prevedel et al., active feed‐forward can render one‐way quantum computation deterministic. An analogous principle applies to the scalable generation of photonic resource states: because each probabilistic photonic fusion operation branches the construction process, the overall success probability shrinks exponentially unless entanglement is generated deterministically. A simple comparative combinatorial resource estimate illustrates the practical consequences of this principle. State‐of‐the‐art fault‐tolerant optical quantum computing architectures incur an unreasonably high single‐photon overhead when relying solely on probabilistic fusion. In contrast, deterministic sources of entangled multi‐photon states, such as semiconductor quantum dots, can reduce the number of required attempts dramatically. Assuming realistic system efficiencies, on average only 15 attempts are needed to generate a 4‐qubit resource state (4‐star), and 89 attempts for a 6‐qubit state (6‐ring), bringing efficient resource state generation in reach with near‐term photonic systems.ABSTRACT As demonstrated experimentally by Prevedel et al., active feed‐forward can render one‐way quantum computation deterministic. An analogous principle applies to the scalable generation of photonic resource states: because each probabilistic photonic fusion operation branches the construction process, the overall success probability shrinks exponentially unless entanglement is generated deterministically. A simple comparative combinatorial resource estimate illustrates the practical consequences of this principle. State‐of‐the‐art fault‐tolerant optical quantum computing architectures incur an unreasonably high single‐photon overhead when relying solely on probabilistic fusion. In contrast, deterministic sources of entangled multi‐photon states, such as semiconductor quantum dots, can reduce the number of required attempts dramatically. Assuming realistic system efficiencies, on average only 15 attempts are needed to generate a 4‐qubit resource state (4‐star), and 89 attempts for a 6‐qubit state (6‐ring), bringing efficient resource state generation in reach with near‐term photonic systems.

Advanced Quantum TechnologiesMay 1, 20261 citation

Unusual Efficiency Of Star States In Multi-photon Processes

Related papers

Unusual Efficiency Of Star States In Multi-photon Processes

Related papers