[ { "id": "authors:qy2mc-7gp10", "collection": "authors", "collection_id": "qy2mc-7gp10", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20230512-186474000.2", "type": "monograph", "title": "Electro-optic transduction in silicon via GHz-frequency nanomechanics", "author": [ { "family_name": "Zhao", "given_name": "Han", "clpid": "Zhao-Han" }, { "family_name": "Bozkurt", "given_name": "Alk\u0131m", "orcid": "0000-0003-0633-8902", "clpid": "Bozkurt-Alk\u0131m-B" }, { "family_name": "Mirhosseini", "given_name": "Mohammad", "orcid": "0000-0002-9084-6880", "clpid": "Mirhosseini-M" } ], "abstract": "Interfacing electronics with optical fiber networks is key to the long-distance transfer of classical and quantum information. Piezo-optomechanical transducers enable such interfaces by using GHz-frequency acoustic vibrations as mediators for converting microwave photons to optical photons via the combination of optomechanical and piezoelectric interactions. However, despite successful demonstrations, efficient piezo-optomechanical transduction remains out of reach due to the challenges associated with hybrid material integration and increased loss from piezoelectric materials when operating in the quantum regime. Here, we demonstrate an alternative approach in which we actuate 5-GHz phonons in a conventional silicon-on-insulator platform. In our experiment, microwave photons resonantly drive a phononic crystal oscillator via the electrostatic force realized in a charge-biased narrow-gap capacitor. The mechanical vibrations are subsequently transferred via a phonon waveguide to an optomechanical cavity, where they transform into optical photons in the sideband of a pump laser field. Operating at room temperature and atmospheric pressure, we measure a microwave-to-optical photon conversion efficiency of 1.8 \u00d7 10\u207b\u2077 in a 3.3 MHz bandwidth, and demonstrate efficient phase modulation with a half-wave voltage of V_\u03c0 = 750 mV. Our results mark a stepping stone towards quantum transduction with integrated devices made from crystalline silicon, which promise efficient high-bandwidth operation, and integration with superconducting qubits. Additionally, the lack of need for piezoelectricity or other intrinsic nonlinearities makes our approach adaptable to a wide range of materials for potential applications beyond quantum technologies.", "publisher": "arXiv", "publication_date": "2022-10-24" }, { "id": "authors:ywb8x-41903", "collection": "authors", "collection_id": "ywb8x-41903", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20230512-186482000.3", "type": "monograph", "title": "Strong kinetic-inductance Kerr nonlinearity with titanium nitride nanowires", "author": [ { "family_name": "Joshi", "given_name": "Chaitali", "clpid": "Joshi-Chaitali" }, { "family_name": "Chen", "given_name": "Wenyuan", "clpid": "Chen-Wenyuan" }, { "family_name": "LeDuc", "given_name": "Henry G.", "clpid": "LeDuc-Henry-G" }, { "family_name": "Day", "given_name": "Peter K.", "clpid": "Day-Peter-K" }, { "family_name": "Mirhosseini", "given_name": "Mohammad", "orcid": "0000-0002-9084-6880", "clpid": "Mirhosseini-M" } ], "abstract": "Thin films of disordered superconductors such as titanium nitride (TiN) exhibit large kinetic inductance (KI), high critical temperature, and large quality factors at the single-photon level. KI nonlinearity can be exploited as an alternative to Josephson junctions for creating novel nonlinear quantum devices with the potential to operate at higher frequencies and at elevated temperatures. We study a means of magnifying KI nonlinearity by confining the current density of resonant electromagnetic modes in nanowires with a small volume V \u2243 10\u207b\u2074 um\u00b3. Using this concept, we realize microwave-frequency Kerr cavities with a maximum Kerr-shift per photon of K/2\u03c0 = 123.5 \u00b1 3 kHz and report a nonlinearity-to-linewidth ratio K/\u03b3 = 21%. With improved design, our devices are expected to approach the regime of strong quantum nonlinearity in the millimeter-wave spectrum.", "publisher": "arXiv", "publication_date": "2022-07-30" }, { "id": "authors:0h81w-59223", "collection": "authors", "collection_id": "0h81w-59223", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20230510-141132000.2", "type": "monograph", "title": "A quantum electromechanical interface for long-lived phonons", "author": [ { "family_name": "Bozkurt", "given_name": "Alk\u0131m", "orcid": "0000-0003-0633-8902", "clpid": "Bozkurt-Alk\u0131m-B" }, { "family_name": "Zhao", "given_name": "Han", "clpid": "Zhao-Han" }, { "family_name": "Joshi", "given_name": "Chaitali", "clpid": "Joshi-Chaitali" }, { "family_name": "LeDuc", "given_name": "Henry G.", "clpid": "LeDuc-Henry-G" }, { "family_name": "Day", "given_name": "Peter K.", "clpid": "Day-Peter-K" }, { "family_name": "Mirhosseini", "given_name": "Mohammad", "orcid": "0000-0002-9084-6880", "clpid": "Mirhosseini-M" } ], "abstract": "Controlling long-lived mechanical oscillators in the quantum regime holds promises for quantum information processing. Here, we present an electromechanical system capable of operating in the GHz-frequency band in a silicon-on-insulator platform. Relying on a novel driving scheme based on an electrostatic field and high-impedance microwave cavities based on TiN superinductors, we are able to demonstrate a parametrically-enhanced electromechanical coupling of g/2\u03c0 = 1.1 MHz, sufficient to enter the strong-coupling regime with a cooperativity of C = 1200. The absence of piezoelectric materials in our platform leads to long mechanical lifetimes, finding intrinsic values up to \u03c4_d = 265 \u03bcs (Q = 8.4 \u00d7 10\u2076 at \u03c9\u2098/2\u03c0= 5 GHz) measured at low-phonon numbers and millikelvin temperatures. Despite the strong parametric drives, we find the cavity-mechanics system in the quantum ground state by performing sideband thermometry measurements. Simultaneously achieving ground-state operation, long mechanical lifetimes, and strong coupling sets the stage for employing silicon electromechanical resonators as memory elements and transducers in hybrid quantum systems, and as a tool for probing the origins of acoustic loss in the quantum regime.", "publisher": "arXiv", "publication_date": "2022-07-22" }, { "id": "authors:2cqpy-dq195", "collection": "authors", "collection_id": "2cqpy-dq195", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190108-091005866", "type": "monograph", "title": "Waveguide-mediated interaction of artificial atoms in the strong coupling regime", "author": [ { "family_name": "Mirhosseini", "given_name": "Mohammad", "orcid": "0000-0002-9084-6880", "clpid": "Mirhosseini-M" }, { "family_name": "Kim", "given_name": "Eunjong", "orcid": "0000-0003-4879-8819", "clpid": "Kim-Eunjong" }, { "family_name": "Zhang", "given_name": "Xueyue", "orcid": "0000-0001-8994-0629", "clpid": "Zhang-Xueyue" }, { "family_name": "Sipahigil", "given_name": "Alp", "orcid": "0000-0003-1469-5272", "clpid": "Sipahigil-Alp" }, { "family_name": "Dieterle", "given_name": "Paul B.", "clpid": "Dieterle-Paul-B" }, { "family_name": "Keller", "given_name": "Andrew J.", "orcid": "0000-0003-3030-1149", "clpid": "Keller-Andrew-J" }, { "family_name": "Asenjo-Garcia", "given_name": "Ana", "orcid": "0000-0001-9850-5610", "clpid": "Asenjo-Garcia-Ana" }, { "family_name": "Chang", "given_name": "Darrick E.", "orcid": "0000-0002-5426-7339", "clpid": "Chang-Darrick-E" }, { "family_name": "Painter", "given_name": "Oskar", "orcid": "0000-0002-1581-9209", "clpid": "Painter-O" } ], "abstract": "Waveguide quantum electrodynamics studies photon-mediated interactions of quantum emitters in a one-dimensional radiation channel. Although signatures of such interactions have been observed previously in a variety of physical systems, observation of coherent cooperative dynamics has been obscured by radiative decay of atoms into the waveguide. Employing transmon qubits as artificial atoms coupled to a microwave coplanar waveguide, here we observe dynamical oscillations in an open system where a designated probe qubit interacts with an entangled dark state of an array of qubits which effectively traps radiation as an atomic cavity. The qubit-cavity system is shown to achieve a large cooperativity of C=172 due to collective enhancement of photon-mediated interactions, entering the strong coupling regime. The quantum coherence of the dark state cavity is also explored through its nonlinear response at the single-excitation level. With realistic refinements, this system is suitable for studying the many-body dynamics of large (N>10) quantum spin chains, synthesizing highly non-classical radiation fields on demand, and implementing universal quantum logic operations with high fidelity on information encoded within decoherence-free subspaces.", "doi": "10.48550/arXiv.1809.09752", "publisher": "arXiv", "publication_date": "2018-09-25" }, { "id": "authors:atdc1-t3448", "collection": "authors", "collection_id": "atdc1-t3448", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190717-082422658", "type": "monograph", "title": "Enhanced Thermal Object Imaging by Photon Addition or Subtraction", "author": [ { "family_name": "Parazzoli", "given_name": "Claudio G.", "clpid": "Parazzoli-C-G" }, { "family_name": "Koltenbah", "given_name": "Benjamin E.", "clpid": "Koltenbah-B-E" }, { "family_name": "Gerwe", "given_name": "David R.", "clpid": "Gerwe-D-R" }, { "family_name": "Idell", "given_name": "Paul S.", "clpid": "Idell-P-S" }, { "family_name": "Gard", "given_name": "Bryan T.", "clpid": "Gard-B-T" }, { "family_name": "Birrittella", "given_name": "Richard", "clpid": "Birrittella-R" }, { "family_name": "Hashemi Rafsanjani", "given_name": "S. M.", "orcid": "0000-0001-7718-5654", "clpid": "Hashemi-Rafsanjani-S-M" }, { "family_name": "Mirhosseini", "given_name": "Mohammad", "clpid": "Mirhosseini-M" }, { "family_name": "Maga\u00f1a-Loaiza", "given_name": "O. S.", "clpid": "Maga\u00f1a-Loaiza-O-S" }, { "family_name": "Dowling", "given_name": "Jonathan P.", "clpid": "Dowling-J-P" }, { "family_name": "Gerry", "given_name": "Christofer C.", "clpid": "Gerry-C-C" }, { "family_name": "Boyd", "given_name": "Robert W.", "orcid": "0000-0002-1234-2265", "clpid": "Boyd-R-W" }, { "family_name": "Capron", "given_name": "Barbara A.", "clpid": "Capron-B-A" } ], "abstract": "Long-baseline interferometry (LBI) is used to reconstruct the image of faint thermal objects. The image quality, for a given exposure time, is in general limited by a low signal-to-noise ratio (SNR). We show theoretically that a significant increase of the SNR, in a LBI, is possible by adding or subtracting photons to the thermal beam. At low photon counts, photon addition-subtraction technology strongly enhances the image quality. We have experimentally realized a nondeterministic physical protocol for photon subtraction. Our theoretical predictions are supported by experimental results.", "doi": "10.48550/arXiv.1609.02780", "publisher": "arXiv", "publication_date": "2016-08-10" }, { "id": "authors:0k9fh-xnf17", "collection": "authors", "collection_id": "0k9fh-xnf17", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190717-083003422", "type": "monograph", "title": "Photon Added Coherent States: Nondeterministic, Noiseless Amplification in Quantum Metrology", "author": [ { "family_name": "Gard", "given_name": "Bryan T.", "clpid": "Gard-B-T" }, { "family_name": "Li", "given_name": "Dong", "clpid": "Li-Dong" }, { "family_name": "You", "given_name": "Chenglong", "clpid": "You-Chenglong" }, { "family_name": "Seshadreesan", "given_name": "Kaushik P.", "clpid": "Seshadreesan-K-P" }, { "family_name": "Birrittella", "given_name": "Richard", "clpid": "Birrittella-R" }, { "family_name": "Luine", "given_name": "Jerome", "clpid": "Luine-J" }, { "family_name": "Hashemi Rafsanjani", "given_name": "Seyed Mohammad", "orcid": "0000-0001-7718-5654", "clpid": "Hashemi-Rafsanjani-S-M" }, { "family_name": "Mirhosseini", "given_name": "Mohammad", "clpid": "Mirhosseini-M" }, { "family_name": "Maga\u00f1a-Loaiza", "given_name": "Omar S.", "clpid": "Maga\u00f1a-Loaiza-O-S" }, { "family_name": "Koltenbah", "given_name": "Benjamin E.", "clpid": "Koltenbah-B-E" }, { "family_name": "Parazzoli", "given_name": "Claudio G.", "clpid": "Parazzoli-C-G" }, { "family_name": "Capron", "given_name": "Barbara A.", "clpid": "Capron-B-A" }, { "family_name": "Boyd", "given_name": "Robert W.", "orcid": "0000-0002-1234-2265", "clpid": "Boyd-R-W" }, { "family_name": "Gerry", "given_name": "Christopher C.", "clpid": "Gerry-C-C" }, { "family_name": "Lee", "given_name": "Hwang", "clpid": "Lee-Hwang" }, { "family_name": "Dowling", "given_name": "Jonathan P.", "clpid": "Dowling-J-P" } ], "abstract": "Probabilistic amplification through photon addition, at the output of an Mach-Zehnder interferometer is discussed for a coherent input state. When a metric of signal to noise ratio is considered, nondeterministic, noiseless amplification of a coherent state shows improvement over a standard coherent state, for the general addition of m photons. The efficiency of realizable implementation of photon addition is also considered and shows how the collected statistics of a post selected state, depend on this efficiency. We also consider the effects of photon loss and inefficient detectors.", "doi": "10.48550/arXiv.1606.09598", "publisher": "arXiv", "publication_date": "2016-06-30" } ]