BEGIN:VCALENDAR VERSION:2.0 PRODID:IEEE vTools.Events//EN CALSCALE:GREGORIAN BEGIN:VTIMEZONE TZID:US/Eastern BEGIN:DAYLIGHT DTSTART:20160313T030000 TZOFFSETFROM:-0500 TZOFFSETTO:-0400 RRULE:FREQ=YEARLY;BYDAY=2SU;BYMONTH=3 TZNAME:EDT END:DAYLIGHT BEGIN:STANDARD DTSTART:20161106T010000 TZOFFSETFROM:-0400 TZOFFSETTO:-0500 RRULE:FREQ=YEARLY;BYDAY=1SU;BYMONTH=11 TZNAME:EST END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTAMP:20161007T164420Z UID:4E3F35F9-800B-11E6-96B8-0050568D2FB3 DTSTART;TZID=US/Eastern:20161012T093000 DTEND;TZID=US/Eastern:20161012T170000 DESCRIPTION:The Baltimore Chapter of Electron Devices and Solid-State Circu its will be hosting its fifth Fall Colloquium on October 12\, 2016. The th eme of this year's meeting is Quantum Computing. This one-day event featur es a variety of experts in multiple aspects of the field: Superconducting Electronics\, Optical Computing\, and Ion Traps. Attendance is open to ind ustry\, government\, and academia\, including students. The venue is once again the American Center for Physics (conference room A)\, one mile south east of the University of Maryland College Park campus. For location and d irections see http://www.acp.org/directions-american-center-physics.\n\nAd mission and parking are free\, but registration is required (below). Compl imentary lunch will be provided for those who register by October 7. Atten dance is limited to 60\; if you are not able to register via this site\, p lease contact the chapter secretary papotyraj@ieee.org.\n\nAgenda:\n\n09:0 0 Registration: Coffee & Donuts\n\n09:45 Opening Remarks\n\n09:55 Dr. Kath y-Anne Soderberg\, Air Force Research Laboratory\, Information Directorate : "Quantum Networking and Quantum Computing at AFRL"\n\n10:30 Dr. Joel Str and\, Northrop Grumman: "Controlling Superconducting Qubits with Josephson Junction Logic"\n\n11:05 Dr. Jim Franson\, UMBC: "Nonlinear Properties of 'Linear' Optical Amplifiers"\n\n11:40 Dr. Jim Freericks\, Georgetown Univ ersity: "Measuring Excitation Energies and Green's Functions in Ion-Trap-B ased Quantum Simulations"\n\n12:15 Lunch Break (complimentary lunch provid ed for registered attendees)\n\n01:00 Dr. Norbert Linke\, UM Joint Quantum Institute: "Quantum Algorithms on a Programmable Ion Trap Quantum Compute r"\n\n01:35 Dr. Jiehang Zhang\, UM Joint Quantum Institute: "Non-equilibri um Dynamics in an Ion Quantum Simulator"\n\n02:10 Dr. Shuo Sun\, UM Joint Quantum Institute: "Quantum Information Processing with Quantum Dot Spins Coupled to Nanophotonic Cavities"\n\n02:45 Coffee Break\n\n03:00 Dr. Micha el Foss-Feig\, Army Research Lab: "Entanglement Growth and Locality in Lon g-Range Interacting Quantum Systems"\n\n03:35 Dr. Fredrik Fatemi\, Army Re search Lab: "Exciting Modes of Optical Nanofibers"\n\n04:10 Dr. Brian Kirb y\, ARL Network Science Division\, "Quantum Network Engineering"\n\n04:45 PM - Concluding Remarks\n\n05:00 PM - Adjourn\n\nSpeaker(s): \, \, \, \n\n Agenda: \nDr. Joel Strand: Controlling superconducting qubits requires sh aped microwave pulses and\, in most control schemes\, fast flux bias to ac hieve the requisite rotations around the Bloch sphere and frequency shifts to accomplish a complete set of one and two qubit gates. Sourcing all the se control signals at room temperature presents an imposing hardware chall enge\, but Reciprocal Quantum Logic (RQL) is a Josephson junction based di gital logic that could provide a low power cryogenic source of control sig nals. We report on the design\, simulation\, and test of Josephson junctio n-based output amplifiers\, microwave switches\, phase shifters\, and bala nced modulators operating in the 5-10 GHz range. The devices are controlle d by F0-level base-band signals\, operate with no power dissipation on chi p\, and have greater than -70 dBm saturation power\, making these devices suitable for control of quantum devices.\n\nDr. James Franson: Optical amp lifiers play a crucial role in classical communications\, where they are u sed to overcome the loss in optical fibers\, for example. At the quantum l evel\, an ideal optical amplifier will introduce an unavoidable amount of noise that must be taken into account in considering their use in applicat ions such as quantum communications and quantum sensors. An ideal optical amplifier has long been considered to be a linear device\, but we recently showed that entanglement between the signal and the amplifying medium can produce large amounts of decoherence that is unrelated to the added noise . In fact\, this effect can degrade the performance of an amplifier even w hen the added noise is negligibly small. The quantum-mechanical origin of these effects will be discussed and their impact on the amplification of S chrodinger cat states will be described.\n\nDr. Jim Freericks: One of the hallmarks of quantum simulation is adiabatic state preparation\, where a s ystem starts in the ground state of a trivial Hamiltonian and is slowly ev olved to the ground state of a complex Hamiltonian\, which then can be use d for further quantum computing or can have its properties analyzed. Since most experiments cannot evolve the system over a long-enough time to main tain adiabaticity\, and because shortcuts to adiabaticity are difficult to achieve\, most quantum simulators create significant diabatic excitations . One can directly study these excitations\, by performing spectroscopy to extract the excitation energies\, or by using Ramsey-type experiments to extract effective spin-spin Green's functions. In this talk\, I will descr ibe how one performs such spectroscopy and discuss the information contain ed in the Green's functions.\n\nDr. Norbert Linke: Trapped atomic ions pro vide pristine "atomic clock" qubits and optical schemes for near-unity sta te preparation and measurement. We present a modular quantum computing arc hitecture comprised of a chain of Ytterbium ions with individual Raman bea m addressing and individual readout [1]. We employ a pulse-shaping scheme [2] to use the transverse modes of motion in the chain to produce entangli ng gates between any qubit pair. This creates a fully connected system whi ch can be configured to run any sequence of single- and two-qubit gates\, making it in effect an arbitrarily programmable quantum computer. To demon strate the universality of this setup\, we present experimental results fr om quantum algorithms on five ions.\n\nDr. Jiehang Zhang: We engineer synt hetic quantum matter by encoding spins in a linear chain of trapped 171Yb+ ions. By applying laser-driven spin-dependent transitions\, we generate a n effective long-range Ising Hamiltonian\, mediated through the collective normal modes of motion. Furthermore\, we apply individual control fields to realize arbitrary state preparation\, as well as programmable random di sorder. Such a well-controlled quantum system provides an ideal platform f or quantum simulations\, where the classical computation resources require d scales exponentially as the system size grows. With these tools\, we pre sent some recent studies on intriguing questions regarding to quantum ther malization and novel driven phases of matter. We study "prethermalization" \, the failure of thermalization due to quasi-conserved quantities. We als o present the first observation of a "discrete time-crystal"\, a novel tem poral-correlated states which breaks discrete time-translation sysmmetry.\ n\nDr. Shuo Sun: The spin of a single electron confined in a quantum dot i s a promising matter qubit for quantum information processing. This spin s ystem possesses microsecond coherence time and allows picosecond timescale control using optical pulses. It is also embedded in a host semiconductor material that can be directly patterned to form compact integrated nanoph otonic devices.\n\nDr. Michael Foss-Feig: For more than a decade\, ultraco ld atomic and molecular systems have been exploited to simulate canonical models of strongly correlated materials. However\, the extremely low (ofte n sub nano-kelvin) temperatures required to realize the most interesting e quilibrium behaviors of such models\, including quantum magnetism and high -temperature superconductivity\, have proven extremely difficult to achiev e. When these ultracold systems are driven far-from equilibrium\, however\ , very small temperatures get traded in for very long time-scales\, which enable the observation of dynamic phenomena that were never even envisione d in the context of real materials. In this talk\, I will review some rece nt experimental and theoretical explorations of non-equilibrium dynamics i n ultracold atomic systems\, and will discuss some of the interesting ques tions that arise naturally from their remarkable tunability. In particular \, I will describe recent efforts to understand the fate of locality --- i .e. constraints on the propagation of information/entanglement --- as inte ractions become increasingly long-ranged.\n\nDr. Fredrik Fatemi: Optical n anofibers (ONFs) - fibers drawn to subwavelength diameters - can have a st rong evanescent field that efficiently interacts with surrounding atoms or quantum systems. One benefit of ONFs is that they are drawn from standard optical fiber that connects well with traditional optical hardware (detec tors\, laser diodes\, etc)\, but this requires adiabatic tapering for effi cient transmission. In this talk\, I describe the use of higher order opti cal modes not only to observe interesting propagation behavior\, but also to measure the ONF radius with 40 picometer sensitivity. I will also descr ibe some upcoming experiments we have with trapped cold atoms.\n\nDr. Bria n Kirby: The establishment of quantum networks will enable several interes ting applications such as secure communication\, distributed quantum compu ting\, and enhanced metrology. Quantum networks are comprised of interconn ected nodes which are capable of storing\, manipulating\, and transmitting entangled quantum states. In this talk we review recent efforts by our gr oup at ARL to understand how entanglement can be distributed between these nodes in the presence of imperfect channels. First we study the effects o f polarization dependent loss\, a common issue in optical fibers\, on enta ngled qubit pairs. Further\, we consider the effects of various channel de coherence mechanisms on entanglement swapping\, and suggest how networks c an be designed to mitigate these. Lastly\, we describe a topology for enta nglement-distribution switching networks which is optimized over worst cas e loss and the number of switches used.\n\nRoom: Conference Room A\, Bldg: American Center for Physics\, One Physics Ellipse\, College Park\, Maryla nd\, United States\, 20740 LOCATION:Room: Conference Room A\, Bldg: American Center for Physics\, One Physics Ellipse\, College Park\, Maryland\, United States\, 20740 ORGANIZER:papotyraj@ieee.org SEQUENCE:13 SUMMARY:Baltimore Colloquium on Quantum Computing URL;VALUE=URI:https://events.vtools.ieee.org/m/41290 X-ALT-DESC:Description: <br /><p>The <strong>Baltimore Chapter of Electron Devices and Solid-State Circuits</strong> will be hosting its fifth <stron g>Fall Colloquium&nbsp\;</strong>on October 12\, 2016.&nbsp\; The theme of this year's meeting is<strong>&nbsp\;Quantum Computing</strong>.&nbsp\; T his one-day event features&nbsp\;a variety of experts in multiple aspects of the field: Superconducting Electronics\, Optical Computing\, and Ion Tr aps.&nbsp\; Attendance is open to industry\, government\, and academia\, i ncluding students.&nbsp\; The venue is once again the American Center for Physics (conference room A)\, one mile southeast of the University of Mary land College Park campus.&nbsp\;&nbsp\;For location and directions see <a href="http://www.acp.org/directions-american-center-physics">http://www.ac p.org/directions-american-center-physics</a>.</p>\n<p>Admission and parkin g are free\, but registration is required (below).&nbsp\;&nbsp\;<em><span style="color: #800080\;">Complimentary lunch will be provided for those wh o register by October 7</span></em>.&nbsp\; Attendance is limited to 60\; if you are not able to register via this site\, please contact the chapter secretary <a href="mailto:papotyraj@ieee.org">papotyraj@ieee.org</a>.</p> \n<p>&nbsp\;</p>\n<p><span style="text-decoration: underline\;"><strong>Ag enda:</strong></span></p>\n<p>09:00&nbsp\;Registration: Coffee &amp\; Donu ts</p>\n<p>09:45&nbsp\;Opening Remarks</p>\n<p>09:55 <strong>Dr. Kathy-Ann e Soderberg</strong>\, Air Force Research Laboratory\, Information Directo rate: "<em>Quantum Networking and Quantum Computing at AFRL</em>"</p>\n<p> 10:30 <strong>Dr. Joel Strand</strong>\, Northrop Grumman: "<em>Controllin g Superconducting Qubits with Josephson Junction Logic</em>"</p>\n<p>11:05 <strong>Dr. Jim Franson</strong>\, UMBC: <em>"Nonlinear Properties of 'Li near' Optical Amplifiers"</em></p>\n<p>11:40 <strong>Dr. Jim Freericks\,</ strong> Georgetown University:<em> <em>"Measuring Excitation Energies and Green's Functions in Ion-Trap-Based Quantum Simulations"</em></em></p>\n<p >12:15&nbsp\;Lunch Break <em>(complimentary lunch provided for registered attendees)&nbsp\;</em></p>\n<p>01:00 <strong>Dr. Norbert Linke</strong>\, UM Joint Quantum Institute: <em>"Quantum Algorithms on a Programmable Ion Trap Quantum Computer"</em></p>\n<p>01:35 <strong>Dr. Jiehang Zhang</stron g>\, UM Joint Quantum Institute: <em>"Non-equilibrium Dynamics in an Ion Q uantum Simulator"</em></p>\n<p>02:10 <strong>Dr. Shuo Sun</strong>\, UM Jo int Quantum Institute: "<em>Quantum Information Processing with Quantum Do t Spins Coupled to Nanophotonic Cavities</em>"</p>\n<p>02:45&nbsp\;Coffee Break</p>\n<p>03:00&nbsp\;<strong>Dr. Michael Foss-Feig</strong>\, Army Re search Lab: <em>"Entanglement Growth and Locality in Long-Range Interactin g Quantum Systems"</em></p>\n<p>03:35 <strong>Dr. Fredrik Fatemi</strong>\ , Army Research Lab:<em> <em>"Exciting Modes of Optical Nanofibers"</em></ em></p>\n<p>04:10 <strong>Dr. Brian Kirby\, </strong>ARL Network Science D ivision\, "<em>Quantum Network Engineering"</em></p>\n<p>04:45 PM -&nbsp\; Concluding Remarks</p>\n<p>05:00&nbsp\;PM&nbsp\;- Adjourn</p><br /><br />A genda: <br /><p><strong>Dr. Joel Strand: </strong><strong>&nbsp\;</strong> Controlling superconducting qubits requires shaped microwave pulses and\, in most control schemes\, fast flux bias to achieve the requisite rotation s around the Bloch sphere and frequency shifts to accomplish a complete se t of one and two qubit gates.&nbsp\; Sourcing all these control signals at room temperature presents an imposing hardware challenge\, but Reciprocal Quantum Logic (RQL) is a Josephson junction based digital logic that coul d provide a low power cryogenic source of control signals. We report on th e design\, simulation\, and test of Josephson junction-based output amplif iers\, microwave switches\, phase shifters\, and balanced modulators opera ting in the 5-10 GHz range.&nbsp\; The devices are controlled by F<sub>0</ sub>-level base-band signals\, operate with no power dissipation on chip\, and have greater than -70 dBm saturation power\, making these devices sui table for control of quantum devices.</p>\n<p><strong>Dr. James Franson</s trong><strong>:&nbsp\; </strong>Optical amplifiers play a crucial role in classical communications\, where they are used to overcome the loss in opt ical fibers\, for example.&nbsp\; At the quantum level\, an ideal optical amplifier will introduce an unavoidable amount of noise that must be taken into account in considering their use in applications such as quantum com munications and quantum sensors.&nbsp\; An ideal optical amplifier has lon g been considered to be a linear device\, but we recently showed that enta nglement between the signal and the amplifying medium can produce large am ounts of decoherence that is unrelated to the added noise.&nbsp\; In fact\ , this effect can degrade the performance of an amplifier even when the ad ded noise is negligibly small.&nbsp\; The quantum-mechanical origin of the se effects will be discussed and their impact on the amplification of Schr odinger cat states will be described.</p>\n<p><strong>Dr. Jim Freericks:&n bsp\; </strong>One of the hallmarks of quantum simulation is adiabatic sta te preparation\, where a system starts in the ground state of a trivial Ha miltonian and is slowly evolved to the ground state of a complex Hamiltoni an\, which then can be used for further quantum computing or can have its properties analyzed.&nbsp\; Since most experiments cannot evolve the syste m over a long-enough time to maintain adiabaticity\, and because shortcuts to adiabaticity are difficult to achieve\, most quantum simulators create significant diabatic excitations.&nbsp\; One can directly study these exc itations\, by performing spectroscopy to extract the excitation energies\, or by using Ramsey-type experiments to extract effective spin-spin Green' s functions.&nbsp\; In this talk\, I will describe how one performs such s pectroscopy and discuss the information contained in the Green's functions .</p>\n<p><strong>Dr. Norbert&nbsp\;Linke:</strong><strong>&nbsp\; </stron g>Trapped atomic ions provide pristine "atomic clock" qubits and optical s chemes for near-unity state preparation and measurement. &nbsp\;We present a modular quantum computing architecture comprised of a chain of Ytterbiu m ions with individual Raman beam addressing and individual readout [1].&n bsp\; We employ a pulse-shaping scheme [2] to use the transverse modes of motion in the chain to produce entangling gates between any qubit pair.&nb sp\; This creates a fully connected system which can be configured to run any sequence of single- and two-qubit gates\, making it in effect an arbit rarily programmable quantum computer.&nbsp\; To demonstrate the universali ty of this setup\, we present experimental results from quantum algorithms on five ions.</p>\n<p><strong>Dr. Jiehang Zhang</strong><strong>:&nbsp\; </strong>We engineer synthetic quantum matter by encoding spins in a linea r chain of trapped 171Yb+ ions.&nbsp\; By applying laser-driven spin-depen dent transitions\, we generate an effective long-range Ising Hamiltonian\, mediated through the collective normal modes of motion. &nbsp\;Furthermor e\, we apply individual control fields to realize arbitrary state preparat ion\, as well as programmable random disorder. &nbsp\;Such a well-controll ed quantum system provides an ideal platform for quantum simulations\, whe re the classical computation resources required scales exponentially as th e system size grows.&nbsp\; With these tools\, we present some recent stud ies on intriguing questions regarding to quantum thermalization and novel driven phases of matter.&nbsp\; We study "prethermalization"\, the failure of thermalization due to quasi-conserved quantities. &nbsp\;We also prese nt the first observation of a "discrete time-crystal"\, a novel temporal-c orrelated states which breaks discrete time-translation sysmmetry.</p>\n<p ><strong>Dr. Shuo Sun</strong><strong>:&nbsp\; </strong>The spin of a sing le electron confined in a quantum dot is a promising matter qubit for quan tum information processing.&nbsp\; This spin system possesses microsecond coherence time and allows picosecond timescale control using optical pulse s. &nbsp\;It is also embedded in a host semiconductor material that can be directly patterned to form compact integrated nanophotonic devices.</p>\n <p><strong>Dr. Michael Foss-Feig</strong>:&nbsp\; For more than a decade\, ultracold atomic and molecular systems have been exploited to simulate ca nonical models of strongly correlated materials.&nbsp\; However\, the extr emely low (often sub nano-kelvin) temperatures required to realize the mos t interesting equilibrium behaviors of such models\, including quantum mag netism and high-temperature superconductivity\, have proven extremely diff icult to achieve.&nbsp\; When these ultracold systems are driven far-from equilibrium\, however\, very small temperatures get traded in for very lon g time-scales\, which enable the observation of dynamic phenomena that wer e never even envisioned in the context of real materials.&nbsp\; In this t alk\, I will review some recent experimental and theoretical explorations of non-equilibrium dynamics in ultracold atomic systems\, and will discuss some of the interesting questions that arise naturally from their remarka ble tunability.&nbsp\; In particular\, I will describe recent efforts to u nderstand the fate of locality --- i.e. constraints on the propagation of information/entanglement --- as interactions become increasingly long-rang ed.</p>\n<p><strong>Dr. Fredrik Fatemi</strong>:&nbsp\; Optical nanofibers (ONFs) - fibers drawn to subwavelength diameters - can have a strong evan escent field that efficiently interacts with surrounding atoms or quantum systems. One benefit of ONFs is that they are drawn from standard optical fiber that connects well with traditional optical hardware (detectors\, la ser diodes\, etc)\, but this requires adiabatic tapering for efficient tra nsmission.&nbsp\; In this talk\, I describe the use of higher order optica l modes not only to observe interesting propagation behavior\, but also to measure the ONF radius with 40 picometer sensitivity.&nbsp\; I will also describe some upcoming experiments we have with trapped cold atoms.</p>\n< p><strong>Dr. Brian Kirby:&nbsp\; </strong>The establishment of quantum ne tworks will enable several interesting applications such as secure communi cation\, distributed quantum computing\, and enhanced metrology. &nbsp\;Qu antum networks are comprised of interconnected nodes which are capable of storing\, manipulating\, and transmitting entangled quantum states.&nbsp\; In this talk we review recent efforts by our group at ARL to understand h ow entanglement can be distributed between these nodes in the presence of imperfect channels.&nbsp\; First we study the effects of polarization depe ndent loss\, a common issue in optical fibers\, on entangled qubit pairs. Further\, we consider the effects of various channel decoherence mechanism s on entanglement swapping\, and suggest how networks can be designed to m itigate these.&nbsp\; Lastly\, we describe a topology for entanglement-dis tribution switching networks which is optimized over worst case loss and t he number of switches used.</p> END:VEVENT END:VCALENDAR