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Quantum Enhanced Sensitivity through Many-Body Bloch Oscillations
Hassan Manshouri, Moslem Zarei, Mehdi Abdi +2
We investigate the sensing capacity of non-equilibrium dynamics in quantum systems exhibiting Bloch oscillations. By focusing on the resource efficiency of the probe, quantified by…
Optimal Superpositions for Particle Detection via Quantum Phase
Eva Kilian, Marko Toroš, P. F. Barker +1
Exploiting quantum mechanics for sensing offers unprecedented possibilities. State of the art proposals for novel quantum sensors often rely on the creation of large superpositions…
Massive quantum superpositions using magneto-mechanics
Sarath Raman Nair, Shilu Tian, Gavin K. Brennen +2
Macroscopic quantum superpositions of massive objects are deeply interesting as they have a number of potential applications ranging from the exploration of the interaction of grav…
Separability criterion using one observable for special states: Entanglement detection via quantum quench
Roopayan Ghosh, Sougato Bose
Detecting entanglement in many-body quantum systems is crucial but challenging, typically requiring multiple measurements. Here, we establish the class of states where measuring co…
Entanglement of Magnetically Levitated Massive Schrödinger Cat States by Induced Dipole Interaction
Ryan J. Marshman, Sougato Bose, Andrew Geraci +1
Quantum entanglement provides a novel way to test short-distance quantum physics in a non-relativistic regime. We provide entanglement-based protocols to potentially test the magne…
Low-Dissipation Data Bus via Coherent Quantum Dynamics
Dylan Lewis, João P. Moutinho, António Costa +2
The transfer of information between two physical locations is an essential component of both classical and quantum computing. In quantum computing the transfer of information must…
Classical Half-Adder using Trapped-ion Quantum Bits: Towards Energy-efficient Computation
Sagar Silva Pratapsi, Patrick H. Huber, Patrick Barthel +3
Reversible computation has been proposed as a future paradigm for energy efficient computation, but so far few implementations have been realised in practice. Quantum circuits, run…
Mass-independent scheme for enhancing spatial quantum superpositions
Run Zhou, Ryan J. Marshman, Sougato Bose +1
Placing a large mass in a large spatial superposition, such as a Schrödinger Cat state is a significant and important challenge. In particular, the large spatial superposition (${\…
Variational Quantum Circuits for Multi-Qubit Gate Automata
Arunava Majumder, Dylan Lewis, Akshaya Jayashankar +2
Implementing quantum operations in the form of natural Hamiltonian dynamics is desirable, since they almost require no external control or feedback. In this work, we propose a NISQ…
Quantum dynamics for energetic advantage in a charge-based classical full-adder
João P. Moutinho, Marco Pezzutto, Sagar Pratapsi +5
We present a proposal for a one-bit full-adder to process classical information based on the quantum reversible dynamics of a triple quantum dot system. The device works via the re…
An Entanglement-Complexity Generalization of the Geometric Entanglement
Alex Nico-Katz, Sougato Bose
We propose a class of generalizations of the geometric entanglement for pure states by exploiting the matrix product state formalism. This generalization is completely divested fro…
Ion Trap Long-Range XY Model for Quantum State Transfer and Optimal Spatial Search
Dylan Lewis, Leonardo Banchi, Yi Hong Teoh +2
Linear ion trap chains are a promising platform for quantum computation and simulation. The XY model with long-range interactions can be implemented with a single side-band Molmer-…
Catapulting towards massive and large spatial quantum superposition
Run Zhou, Ryan J. Marshman, Sougato Bose +1
Large spatial quantum superposition of size for mass is required to probe the foundations of quantum mechanics…
Requirements on Quantum Superpositions of Macro-Objects for Sensing Neutrinos
Eva Kilian, Marko Toroš, Frank F. Deppisch +2
We examine a macroscopic system in a quantum superposition of two spatially separated localized states as a detector for a stream of weakly interacting relativistic particles. We d…
Effects of XX-catalysts on quantum annealing spectra with perturbative crossings
Natasha Feinstein, Louis Fry-Bouriaux, Sougato Bose +1
In adiabatic quantum annealing the required run-time to reach a given ground-state fidelity is dictated by the size of the minimum gap that appears between the ground and first exc…
Quantum Liang Information Flow as Causation Quantifier
Bin Yi, Sougato Bose
Liang information flow is a quantity widely used in classical network theory to quantify causation, and has been applied widely, for example, to finance and climate. The most strik…
Sequential measurements for quantum-enhanced magnetometry in spin chain probes
Victor Montenegro, Gareth Siôn Jones, Sougato Bose +1
Quantum sensors outperform their classical counterparts in their estimation precision, given the same amount of resources. So far, quantum-enhanced sensitivity has been achieved by…
Floquet-induced localization in long-range many-body systems
Rozhin Yousefjani, Sougato Bose, Abolfazl Bayat
The fate of many-body localization in long-range interacting systems is not fully settled. For instance, the phase boundary between ergodic and many-body localized regimes is still…
Improving resilience of the Quantum Gravity Induced Entanglement of Masses (QGEM) to decoherence using 3 superpositions
Martine Schut, Jules Tilly, Ryan J. Marshman +2
Recently a protocol called quantum gravity induced entanglement of masses (QGEM) that aims to test the quantum nature of gravity using the entanglement of 2 qubits was proposed. Th…
Voltage-controlled Hubbard spin transistor
Rozhin Yousefjani, Sougato Bose, Abolfazl Bayat
Transistors are key elements for enabling computational hardware in both classical and quantum domains. Here, we propose a voltage-gated spin transistor using itinerant electrons i…
Constructing Nano-Object Quantum Superpositions with a Stern-Gerlach Interferometer
Ryan J. Marshman, Anupam Mazumdar, Ron Folman +1
Probing quantum mechanics, quantum aspects of general relativity along with the sensing and the constraining of classical gravity can all be enabled by unprecedented spatial sizes…
Qudits for Witnessing Quantum Gravity Induced Entanglement of Masses Under Decoherence
Jules Tilly, Ryan J. Marshman, Anupam Mazumdar +1
Recently a theoretical and an experimental protocol known as quantum gravity induced entanglement of masses (QGEM) has been proposed to test the quantum nature of gravity using two…
Realization of a complete Stern-Gerlach interferometer: Towards a test of quantum gravity
Yair Margalit, Or Dobkowski, Zhifan Zhou +8
The Stern-Gerlach effect, discovered a century ago, has become a paradigm of quantum mechanics. Surprisingly there has been little evidence that the original scheme with freely pro…
Optimal quantum spatial search with one-dimensional long-range interactions
Dylan Lewis, Asmae Benhemou, Natasha Feinstein +2
Continuous-time quantum walks can be used to solve the spatial search problem, which is an essential component for many quantum algorithms that run quadratically faster than their…