00503nas a2200157 4500008003900000022001400039245006500053210006400118260001600182300001100198490000700209100002300216700001600239700002600255856006400281 2022 d a0143-080700aHow long does it take to implement a projective measurement?0 aHow long does it take to implement a projective measurement cJan-05-2022 a0354040 v431 aStrasberg, Philipp1 aModi, Kavan1 aSkotiniotis, Michalis uhttps://iopscience.iop.org/article/10.1088/1361-6404/ac5a7a00394nas a2200133 4500008003900000245004900039210004900088260000800137300001100145490000800156100001600164700002000180856006000200 2019 d00aHow to Quantify a Dynamical Quantum Resource0 aHow to Quantify a Dynamical Quantum Resource cOct a1504010 v1231 aGour, Gilad1 aWinter, Andreas uhttps://link.aps.org/doi/10.1103/PhysRevLett.123.15040100629nas a2200145 4500008003900000022001400039245009000053210006900143260001600212490000700228100002000235700001400255700002400269856019000293 2017 d a2470-004500aHeating without heat: Thermodynamics of passive energy filters between finite systems0 aHeating without heat Thermodynamics of passive energy filters be cJan-09-20170 v961 aMuñoz-Tapia, R1 aBrito, R.1 aParrondo, J., M. R. uhttps://link.aps.org/doi/10.1103/PhysRevE.96.030103http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevE.96.030103/fulltexthttps://link.aps.org/article/10.1103/PhysRevE.96.03010301085nas a2200169 4500008003900000245006800039210006100107260000800168300001100176490000700187520059500194100001700789700001600806700001800822700001900840856005600859 2016 d00aHeisenberg-{Weyl} {Observables}: {Bloch} vectors in phase space0 aHeisenberg Weyl Observables Bloch vectors in phase space cjul a0103010 v943 aWe introduce a Hermitian generalization of Pauli matrices to higher dimensions which is based on Heisenberg-Weyl operators. The complete set of Heisenberg-Weyl observables allows us to identify a real-valued Bloch vector for an arbitrary density operator in discrete phase space, with a smooth transition to infinite dimensions. Furthermore, we derive bounds on the sum of expectation values of any set of anticommuting observables. Such bounds can be used in entanglement detection and we show that Heisenberg-Weyl observables provide a first nontrivial example beyond the dichotomic case.1 aAsadian, Ali1 aErker, Paul1 aHuber, Marcus1 aKlockl, Claude uhttps://link.aps.org/doi/10.1103/PhysRevA.94.01030100867nas a2200133 4500008004100000022001400041245004800055210004800103300001100151490000800162520049000170100002100660856005200681 2009 eng d a0031-900700aHolonomic Quantum Computation in Subsystems0 aHolonomic Quantum Computation in Subsystems a0905020 v1033 aWe introduce a generalized method of holonomic quantum computation (HQC) based on encoding in subsystems. As an application, we propose a scheme for applying holonomic gates to unencoded qubits by the use of a noisy ancillary qubit. This scheme does not require initialization in a subspace since all dynamical effects factor out as a transformation on the ancilla. We use this approach to show how fault-tolerant HQC can be realized via 2-local Hamiltonians with perturbative gadgets.1 aOreshkov, Ognyan uhttp://prl.aps.org/abstract/PRL/v103/i9/e09050201278nas a2200157 4500008004100000245003500041210003500076300000800111490000600119520082700125100001700952700002200969700002800991700002401019856007701043 2007 eng d00aHow to hide a secret direction0 aHow to hide a secret direction a2440 v93 aWe present a procedure to share a secret spatial direction in the absence of a common reference frame using a multipartite quantum state. The procedure guarantees that the parties can determine the direction if they perform joint measurements on the state, but fail to do so if they restrict themselves to local operations and classical communication (LOCC). We calculate the fidelity for joint measurements, give bounds on the fidelity achievable by LOCC, and prove that there is a non-vanishing gap between the two of them, even in the limit of infinitely many copies. The robustness of the procedure under particle loss is also studied. As a by-product we find bounds on the probability of discriminating by LOCC between the invariant subspaces of total angular momentum N/2 and N/2-1 in a system of N elementary spins.1 aBagan, Emili1 aCalsamiglia, John1 aDemkowicz-Dobrzanski, R1 aMuñoz-Tapia, Ramon uhttp://iopscience.iop.org/1367-2630/9/8/244/pdf/1367-2630\_9\_8\_244.pdf