Quantum State Tomography System
 NuCrypt, LLC has developed a unique system of instruments for measuring the quantum state of light. The quantum state tomography system consists of a polarization analyzer (PA-1000), a correlated single photon detection system (CPDS-1000), and all the associated software required for automated measurements and state reconstruction. The CPDS can contain up to four single- photon detectors counting at 50MHz. A 4x4 complex density matrix representing the quantum state is reconstructed and the associated information including the state fidelity can be plotted as a function of time. An example application is to characterize a source of polarization entangled photon pairs, such as the NuCrypt EPS-1000.
A key feature of this system is that the measurement time required for quantum state reconstruction can be <2s, making possible almost real-time measurements. The component devices, which are also sold individually, are useful for research and development of applications in the field of quantum information science and technology.
Quantum State Tomography System
Automated Entanglement Generation and Detection System
The NuCrypt entangled photon source (EPS-1000), correlated photon detection system (CPDS-1000), and electronically controlled polarization analyzer (PA-1000), can all interoperate to automatically take data. Two-photon interference fringes or other user-specified measurements can be programmed in the system control software which coordinates all the devices, including a software system for quantum state tomography (link to quantum state tomography page). Basis states can be switched in as little as 10ms. With appropriate options, measurements of quantum entanglement distributed over long distances of fiber are possible. Contact NuCrypt sales to help create a solution that meets your particular needs.
Single location automated entanglement measurement system.
Entanglement measurement system with various options allowing for distributed measurements.
ADM: Add Drop Multiplexer
CR: Clock Recovery
Information About This Product
For more information about our Quantum State Tomography System please contact Gregory Kanter: Vice President, NuCrypt LLC, kanterg@nucrypt.net - (224) 361-3028
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