TY - JOUR AB - Microelectromechanical systems and integrated photonics provide the basis for many reliable and compact circuit elements in modern communication systems. Electro-opto-mechanical devices are currently one of the leading approaches to realize ultra-sensitive, low-loss transducers for an emerging quantum information technology. Here we present an on-chip microwave frequency converter based on a planar aluminum on silicon nitride platform that is compatible with slot-mode coupled photonic crystal cavities. We show efficient frequency conversion between two propagating microwave modes mediated by the radiation pressure interaction with a metalized dielectric nanobeam oscillator. We achieve bidirectional coherent conversion with a total device efficiency of up to ~60%, a dynamic range of 2 × 10^9 photons/s and an instantaneous bandwidth of up to 1.7 kHz. A high fidelity quantum state transfer would be possible if the drive dependent output noise of currently ~14 photons s^−1 Hz^−1 is further reduced. Such a silicon nitride based transducer is in situ reconfigurable and could be used for on-chip classical and quantum signal routing and filtering, both for microwave and hybrid microwave-optical applications. AU - Fink, Johannes M AU - Kalaee, M. AU - Norte, R. AU - Pitanti, A. AU - Painter, O. ID - 8038 IS - 3 JF - Quantum Science and Technology TI - Efficient microwave frequency conversion mediated by a photonics compatible silicon nitride nanobeam oscillator VL - 5 ER - TY - JOUR AB - Practical quantum networks require low-loss and noise-resilient optical interconnects as well as non-Gaussian resources for entanglement distillation and distributed quantum computation. The latter could be provided by superconducting circuits but existing solutions to interface the microwave and optical domains lack either scalability or efficiency, and in most cases the conversion noise is not known. In this work we utilize the unique opportunities of silicon photonics, cavity optomechanics and superconducting circuits to demonstrate a fully integrated, coherent transducer interfacing the microwave X and the telecom S bands with a total (internal) bidirectional transduction efficiency of 1.2% (135%) at millikelvin temperatures. The coupling relies solely on the radiation pressure interaction mediated by the femtometer-scale motion of two silicon nanobeams reaching a Vπ as low as 16 μV for sub-nanowatt pump powers. Without the associated optomechanical gain, we achieve a total (internal) pure conversion efficiency of up to 0.019% (1.6%), relevant for future noise-free operation on this qubit-compatible platform. AU - Arnold, Georg M AU - Wulf, Matthias AU - Barzanjeh, Shabir AU - Redchenko, Elena AU - Rueda Sanchez, Alfredo R AU - Hease, William J AU - Hassani, Farid AU - Fink, Johannes M ID - 8529 JF - Nature Communications KW - General Biochemistry KW - Genetics and Molecular Biology KW - General Physics and Astronomy KW - General Chemistry SN - 2041-1723 TI - Converting microwave and telecom photons with a silicon photonic nanomechanical interface VL - 11 ER - TY - GEN AB - This datasets comprises all data shown in plots of the submitted article "Converting microwave and telecom photons with a silicon photonic nanomechanical interface". Additional raw data are available from the corresponding author on reasonable request. AU - Arnold, Georg M AU - Wulf, Matthias AU - Barzanjeh, Shabir AU - Redchenko, Elena AU - Rueda Sanchez, Alfredo R AU - Hease, William J AU - Hassani, Farid AU - Fink, Johannes M ID - 13056 TI - Converting microwave and telecom photons with a silicon photonic nanomechanical interface ER - TY - GEN AB - This dataset comprises all data shown in the figures of the submitted article "Surpassing the resistance quantum with a geometric superinductor". Additional raw data are available from the corresponding author on reasonable request. AU - Peruzzo, Matilda AU - Trioni, Andrea AU - Hassani, Farid AU - Zemlicka, Martin AU - Fink, Johannes M ID - 13070 TI - Surpassing the resistance quantum with a geometric superinductor ER - TY - JOUR AB - Superconductor insulator transition in transverse magnetic field is studied in the highly disordered MoC film with the product of the Fermi momentum and the mean free path kF*l close to unity. Surprisingly, the Zeeman paramagnetic effects dominate over orbital coupling on both sides of the transition. In superconducting state it is evidenced by a high upper critical magnetic field 𝐵𝑐2, by its square root dependence on temperature, as well as by the Zeeman splitting of the quasiparticle density of states (DOS) measured by scanning tunneling microscopy. At 𝐵𝑐2 a logarithmic anomaly in DOS is observed. This anomaly is further enhanced in increasing magnetic field, which is explained by the Zeeman splitting of the Altshuler-Aronov DOS driving the system into a more insulating or resistive state. Spin dependent Altshuler-Aronov correction is also needed to explain the transport behavior above 𝐵𝑐2. AU - Zemlicka, Martin AU - Kopčík, M. AU - Szabó, P. AU - Samuely, T. AU - Kačmarčík, J. AU - Neilinger, P. AU - Grajcar, M. AU - Samuely, P. ID - 8944 IS - 18 JF - Physical Review B SN - 24699950 TI - Zeeman-driven superconductor-insulator transition in strongly disordered MoC films: Scanning tunneling microscopy and transport studies in a transverse magnetic field VL - 102 ER - TY - JOUR AB - Quantum illumination uses entangled signal-idler photon pairs to boost the detection efficiency of low-reflectivity objects in environments with bright thermal noise. Its advantage is particularly evident at low signal powers, a promising feature for applications such as noninvasive biomedical scanning or low-power short-range radar. Here, we experimentally investigate the concept of quantum illumination at microwave frequencies. We generate entangled fields to illuminate a room-temperature object at a distance of 1 m in a free-space detection setup. We implement a digital phase-conjugate receiver based on linear quadrature measurements that outperforms a symmetric classical noise radar in the same conditions, despite the entanglement-breaking signal path. Starting from experimental data, we also simulate the case of perfect idler photon number detection, which results in a quantum advantage compared with the relative classical benchmark. Our results highlight the opportunities and challenges in the way toward a first room-temperature application of microwave quantum circuits. AU - Barzanjeh, Shabir AU - Pirandola, S. AU - Vitali, D AU - Fink, Johannes M ID - 7910 IS - 19 JF - Science Advances TI - Microwave quantum illumination using a digital receiver VL - 6 ER - TY - CONF AB - Quantum illumination is a sensing technique that employs entangled signal-idler beams to improve the detection efficiency of low-reflectivity objects in environments with large thermal noise. The advantage over classical strategies is evident at low signal brightness, a feature which could make the protocol an ideal prototype for non-invasive scanning or low-power short-range radar. Here we experimentally investigate the concept of quantum illumination at microwave frequencies, by generating entangled fields using a Josephson parametric converter which are then amplified to illuminate a room-temperature object at a distance of 1 meter. Starting from experimental data, we simulate the case of perfect idler photon number detection, which results in a quantum advantage compared to the relative classical benchmark. Our results highlight the opportunities and challenges on the way towards a first room-temperature application of microwave quantum circuits. AU - Barzanjeh, Shabir AU - Pirandola, Stefano AU - Vitali, David AU - Fink, Johannes M ID - 9001 IS - 9 SN - 1097-5659 T2 - IEEE National Radar Conference - Proceedings TI - Microwave quantum illumination with a digital phase-conjugated receiver VL - 2020 ER - TY - JOUR AB - Microwave photonics lends the advantages of fiber optics to electronic sensing and communication systems. In contrast to nonlinear optics, electro-optic devices so far require classical modulation fields whose variance is dominated by electronic or thermal noise rather than quantum fluctuations. Here we demonstrate bidirectional single-sideband conversion of X band microwave to C band telecom light with a microwave mode occupancy as low as 0.025 ± 0.005 and an added output noise of less than or equal to 0.074 photons. This is facilitated by radiative cooling and a triply resonant ultra-low-loss transducer operating at millikelvin temperatures. The high bandwidth of 10.7 MHz and total (internal) photon conversion efficiency of 0.03% (0.67%) combined with the extremely slow heating rate of 1.1 added output noise photons per second for the highest available pump power of 1.48 mW puts near-unity efficiency pulsed quantum transduction within reach. Together with the non-Gaussian resources of superconducting qubits this might provide the practical foundation to extend the range and scope of current quantum networks in analogy to electrical repeaters in classical fiber optic communication. AU - Hease, William J AU - Rueda Sanchez, Alfredo R AU - Sahu, Rishabh AU - Wulf, Matthias AU - Arnold, Georg M AU - Schwefel, Harald G.L. AU - Fink, Johannes M ID - 9114 IS - 2 JF - PRX Quantum SN - 2691-3399 TI - Bidirectional electro-optic wavelength conversion in the quantum ground state VL - 1 ER - TY - JOUR AB - Quantum transduction, the process of converting quantum signals from one form of energy to another, is an important area of quantum science and technology. The present perspective article reviews quantum transduction between microwave and optical photons, an area that has recently seen a lot of activity and progress because of its relevance for connecting superconducting quantum processors over long distances, among other applications. Our review covers the leading approaches to achieving such transduction, with an emphasis on those based on atomic ensembles, opto-electro-mechanics, and electro-optics. We briefly discuss relevant metrics from the point of view of different applications, as well as challenges for the future. AU - Lauk, Nikolai AU - Sinclair, Neil AU - Barzanjeh, Shabir AU - Covey, Jacob P AU - Saffman, Mark AU - Spiropulu, Maria AU - Simon, Christoph ID - 9194 IS - 2 JF - Quantum Science and Technology SN - 2058-9565 TI - Perspectives on quantum transduction VL - 5 ER - TY - GEN AB - This dataset comprises all data shown in the plots of the main part of the submitted article "Bidirectional Electro-Optic Wavelength Conversion in the Quantum Ground State". Additional raw data are available from the corresponding author on reasonable request. AU - Hease, William J AU - Rueda Sanchez, Alfredo R AU - Sahu, Rishabh AU - Wulf, Matthias AU - Arnold, Georg M AU - Schwefel, Harald AU - Fink, Johannes M ID - 13071 TI - Bidirectional electro-optic wavelength conversion in the quantum ground state ER -